PANCHAYAT RAJ ENGINEERING DEPARTMENT

DETAILED PROJECT REPORT FOR

IMPROVEMENTS TO GANAKALLU KERE, GANAKALLU

VILLAGE, BANNIKUPE GRAMA PANCHAYAT RAMANAGARA
TALUK RAMANAGARA DISTRICT

ESTIMATED COST: 75.00 LAKHS

EXECUTIVE ENGINEER ASSISTANT EXECUTIVE ENGINEER

PANCHAYAT RAJ ENGINEERING PANCHAYAT RAJ ENGINEERING
DEPARTMENT DIVISION, RAMANAGARA DEPARTMENT SUB DIVISION, RAMANAGARA
PANCHAYAT RAJ ENGINEERING DEPARTMENT
GOVERNMENTOFKARNATAKA

EXECUTIVE ENGINEER
PANCHAYAT RAJ ENGINEERING
DEPARTMENT DIVISION, RAMANAGARA

ASSISTANT EXECUTIVE ENGINEER

PANCHAYAT RAJ ENGINEERING
DEPARTMENT SUB DIVISION,
RAMANAGARA

DETAILED PROJECT REPORT FOR

DPR FOR IMPROVEMENTS TO GANAKALLU KERE,

GANAKALLU VILLAGE, BANNIKUPPE GRAMA PANCHAYAT
BIDADI HOBLI RAMANAGARA TALUK RAMANAGARA
DISTRICT

ESTIMATED AMOUNT: 75.00 LAKHS

 Owner: PANCHAYATH RAJ ENGINEERING Improvement of Tank of Ganakallu Tank
DEPARTMENT RAMANAGAR

CHAPTER-I:

INTRODUCTION ABOUT TANK & ITS IMPORTANCE

1.1 Introduction about Tank:

A Tank/lake is a large, natural or artificially created inland body of standing water, typically
freshwater, that is surrounded by land. Lakes can vary widely in size, depth, and shape,
ranging from small ponds to vast bodies of water. They can be formed through various
geological processes, including tectonic activity, glacial activity, volcanic activity, or human-
made constructions such as dams.

Key characteristics of waterbodies include:

Stagnant Water:

Lakes are characterized by relatively still or stagnant water as compared to flowing rivers
or streams.

Inflow and Outflow:

Lakes receive water from inflowing rivers, streams, precipitation, and groundwater. They
also have an outflow, which can be a river or an underground channel.

Basin or Depression:

Lakes are typically formed in basins or depressions in the Earth's surface. These basins
may result from geological processes such as tectonic activity or glacial erosion.

Natural or Artificial:

While many lakes are naturally occurring, some are human- made or artificial, created by
the construction of dams or reservoirs. Freshwater or Saline: Most lakes contain
freshwater, but there are also saline or brackish lakes with higher salt concentrations. The
type of water depends on factors such as geology, climate, and location.

Diversity of Sizes and Shapes:

Lakes come in various sizes, ranging from small ponds to large, expansive bodies of
water like the Great Lakes in North America. Shapes can be round, oval, irregular, or
elongated.

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 Owner: PANCHAYATH RAJ ENGINEERING Improvement of Tank of Ganakallu Tank
DEPARTMENT RAMANAGAR

Ecological Systems:

Lakes support diverse ecosystems with a variety of plant and animal life. They provide
habitats for fish, birds, aquatic plants, and other organisms. Lakes serve multiple purposes,
including providing drinking water, support in agriculture through irrigation, offering
recreational opportunities, and contributing to the overall balance of regional ecosystems

1.2 Importance of Tanks/Lakes

Freshwater and lakes play a vital role in sustaining life on Earth, supporting ecosystems, human
civilizations, and various economic activities. The importance of freshwater and lakes can be
understood from various perspectives:

Life Sustenance

Drinking Water: Freshwater is essential for human survival. Lakes are significant sources of
drinking water for communities around the world. Access to clean and safe freshwater is
crucial for maintaining public health.

Biodiversity and Ecosystems:

Habitats for Species: Lakes support diverse ecosystems, providing habitats for a wide range
of plant and animal species. These ecosystems contribute to global biodiversity and play a
role in maintaining the balance of various ecological processes.

Agriculture and Irrigation:

Crop Cultivation: Freshwater from lakes is a primary source for irrigation in agriculture. Many
civilizations have developed around fertile lands near lakes, relying on them for successful crop
cultivation and sustained agricultural productivity.

Hydropower Generation:

Energy Production: Lakes often serve as reservoirs for hydropower generation. The flow of
water through dams and hydroelectric power plants generates electricity, contributing to a
sustainable and renewable energy source.

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 Owner: PANCHAYATH RAJ ENGINEERING Improvement of Tank of Ganakallu Tank
DEPARTMENT RAMANAGAR

Recreation and Tourism:

Leisure Activities: Lakes provide recreational opportunities for activities such as boating,
fishing, swimming, and hiking. Many lakes attract tourists and contribute to local economies
through the tourism industry.

Climate Regulation:

Temperature Moderation: Bodies of water, including lakes, play a role in moderating

temperatures in their surroundings. They absorb and release heat more slowly than land, helping
to regulate local climates

Water Cycle and Hydrological Processes:

Water Storage: Lakes act as natural reservoirs, storing water and releasing it gradually.
They are integral to the water cycle, impacting weather patterns, precipitation, and
groundwater recharge.

Cultural and Spiritual Significance:

Cultural Heritage: Lakes often have cultural and spiritual significance for local
communities. Many cultural practices, rituals, and traditions are associated with lakes,
reflecting their historical importance.

Biodiversity Conservation:

Preserving Endangered Species: Lakes and freshwater habitats are critical for the
conservation of endangered and endemic species. Protecting these environments 1s essential
for maintaining the health of ecosystems and preventing species loss.

Global Water Security:

Global Resource: Freshwater, including that stored in lakes, is a finite resource. As the
global population grows, ensuring water security becomes a critical challenge. Proper
management of lakes and freshwater resources is essential for meeting the growing demand
for water.

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 Owner: PANCHAYATH RAJ ENGINEERING Improvement of Tank of Ganakallu Tank
DEPARTMENT RAMANAGAR

Flood Control:

Natural Buffer: Lakes can act as natural buffers against floods. They absorb excess water
during heavy rainfall and release it slowly, helping to prevent downstream flooding and erosion.

In summary, freshwater and Tanks are indispensable resources with far-reaching impacts on
the environment, biodiversity, human societies, and economies. Sustainable management
and conservation of these resources are essential to ensure a balanced and thriving
planet.

1.3 Historical background of waterbodies in Karnataka:

Karnataka, a state located in the southwestern part of India, is blessed with a diverse
landscape that includes numerous lakes and tanks. These water bodies have played a crucial
role in the historical, cultural, and ecological fabric of the region. Here's a general
introduction to lakes and tanks in Karnataka

Cultural and Historical Significance:

Many lakes and tanks in Karnataka hold cultural and historical significance, often dating
back centuries. Some were constructed during the rule of dynasties like the Cholas, Hoysalas,
and Vijayanagara Empire, contributing to the region's rich heritage.

Water Management and Irrigation:

Lakes and tanks have traditionally been essential for water management and irrigation in
Karnataka. They were designed to capture and store rainwater, providing a sustainable water
supply for agriculture, especially in regions with seasonal rainfall patterns.

Drinking Water Source:

Several lakes and tanks in Karnataka have served as important sources of drinking water for
local communities. Over the years, urbanization and increasing population have led to
challenges in maintaining the water quality of these sources.

Ecological Importance:

region. They support diverse flora and fauna, serving as habitats for various species of birds,
fish, and aquatic plants.

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 Owner: PANCHAYATH RAJ ENGINEERING Improvement of Tank of Ganakallu Tank
DEPARTMENT RAMANAGAR

Recreational Spaces:

Many lakes in Karnataka have transformed into recreational spaces, offering opportunities
for boating, picnicking, and other leisure activities. Urban lakes in cities like Bengaluru also
serve as green spaces for residents.

Challenges and Conservation:

Urbanization, pollution, encroachment, and unsustainable water management practices pose

challenges to the health of waterbodies in Karnataka. Conservation efforts and rejuvenation projects
are underway to address these issues and restore the ecological balance.

Government Initiatives:

The state government, along with local bodies and environmental organizations, has been
actively involved in initiatives to conserve and rejuvenate waterbodies. These efforts aim to
ensure sustainable water resources and maintain the overall well-being of the environment.

In summary, lakes and tanks in Karnataka have been integral to the state's
historical, cultural, and environmental identity. They continue to be important for water
management, irrigation, and as sources of recreation, while ongoing efforts focus on
addressing challenges to ensure their conservation and sustainability.

1.4 Main Parameters of waterbodies.

Lakes are diverse ecosystems, and their characteristics can vary widely based on factors
such as location, size, climate, and geological features. Several parameters are commonly
used to describe and study lakes. Here are some main parameters:

Size and Depth:

Surface Area: The total area covered by the lake. Maximum Depth: The deepest point in the
lake. Volume: The total amount of water the lake can hold.

Water Quality:

PH Level: The measure of acidity or alkalinity of the water. Dissolved Oxygen

(DO): The amount of oxygen dissolved in the water is vital for aquatic life.

Nutrient Levels: Concentrations of nutrients like nitrogen and phosphorus, which

can affect water quality and lead to issues like eutrophication.

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 Owner: PANCHAYATH RAJ ENGINEERING Improvement of Tank of Ganakallu Tank
DEPARTMENT RAMANAGAR

Temperature:

Surface Temperature: Temperature of the water at the lake's surface. Thermal

Stratification: The layering of water with different temperatures, which can affect the distribution
of oxygen and nutrients.

Lake Morphometry:

Shoreline Length: The total length of the lake's shoreline. Fetch: The distance over
which wind can blow across the lake's surface, influencing wave patterns.

Hydrology:

Inflow and Outflow: The sources of water entering the lake (inflow) and the water leaving
the lake (outflow).

Residence Time: The average amount of time water spends in the lake before leaving

Biotic Factors:

Biodiversity: The variety of plant and animal species present in the lake. Fish Population: The
types and abundance of fish species in the lake.

Sediment Characteristics:

Sediment Type: The composition of materials at the lake bottom. Sediment Accumulation Rates:
The rate at which sediment builds up over time.

Land Use and Watershed Characteristics:

Land Cover: The types of land uses in the lake's watershed, such as urban, agricultural, or
forested areas.

Land Use Changes: Alterations in the land cover over time, impacting water
quality and quantity.

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DEPARTMENT RAMANAGAR

Eutrophication Status:

Trophic State: The classification of a lake based on its nutrient status, often categorized as
oligotrophic (low nutrients), mesotrophic (moderate nutrients), or eutrophic (high nutrients).

Water Residence and Turnover: Lake Stratification: The division of the lake into layers based on
temperature and density.

Ecological Health:

Ecological Indicators: Measurements or observations used to assess the overall health of the
lake ecosystem, such as the presence of indicator species.

These parameters help scientists, ecologists, and environmentalists understand the

characteristics and functioning of lakes, enabling better management and conservation
efforts. Monitoring these parameters over time is essential for assessing changes in lake
ecosystems and addressing potential environmental issues.

1.5 Present Status of Lakes in RAMANAGARA:

Ramanagara city and district of Karnataka on the banks of the Arkavathi River and the
administrative center of the taluk of the same name. Ramanagara is the largest cocoon

silk producer in India. (1,553 km2). It is located among the lush green forests of the
state of Karnataka.

1.6 Need of Tank /Lake Rejuvenation Project

Lake rejuvenation projects are crucial for various environmental, social, and economic reasons.
Here are some of the key necessities and benefits associated with lake rejuvenation projects:

Water Security

Lake rejuvenation enhances water storage capacity and helps in maintaining a sustainable
and reliable water supply. This is especially important in regions where lakes serve as crucial
water sources for drinking, agriculture, and industrial purposes.

Biodiversity Conservation:

Healthy lakes support diverse ecosystems, providing habitats for a wide range of plant and animal
species. Rejuvenation projects help maintain biodiversity, preserving the natural balance of
aquatic ecosystems and contributing to overall environmental health.

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 Owner: PANCHAYATH RAJ ENGINEERING Improvement of Tank of Ganakallu Tank
DEPARTMENT RAMANAGAR

Erosion Control:

Well-maintained lakes help control soil erosion by regulating water flow and preventing
sedimentation. This is vital for preserving the quality of agricultural lands and preventing
downstream siltation.

Flood Control:

Properly managed lakes can act as buffers against flooding. Rejuvenation projects focus on
optimizing the capacity of lakes to absorb excess water during heavy rainfall and release it
gradually, reducing the risk of downstream flooding.

Recharge of Groundwater:

Lakes play a crucial role in recharging groundwater by allowing water to percolate into the soil.
Rejuvenation projects often involve measures to enhance groundwater recharge, benefiting
overall water availability in the region.

Climate Resilience:

Lakes contribute to climate resilience by moderating temperature extremes an<I influencing

local weather patterns. Well-maintained lakes can help mitigate the impacts of climate
change on communities and ecosystems.

Recreation and Tourism:

Rejuvenated lakes create aesthetically pleasing and functional spaces that attract visitors.
This not only enhances the quality of life for local residents but also contributes to the
tourism industry and the local economy.

Cultural and Heritage Preservation:

Many lakes hold cultural and historical significance. Rejuvenation projects often include
efforts to preserve the cultural heritage associated with lakes, ensuring that these spaces
remain important parts of local identity.

Livelihood Support:

Fishing communities and other livelihoods dependent on lakes benefit from rejuvenation
projects that maintain fish habitats and sustain aquatic resources. This helps in supporting
the economic well-being of local communities.

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 Owner: PANCHAYATH RAJ ENGINEERING Improvement of Tank of Ganakallu Tank
DEPARTMENT RAMANAGAR

Aesthetic and Recreational Value:

Well-maintained lakes enhance the aesthetic appeal of the surroundings and provide
opportunities for recreational activities such as boating, fishing, and picnicking. This contributes
to the overall well-being and quality of life for nearby residents.

Tanks and lakes play an important role in helping irrigation as well as recharging ground
water in the surrounding areas. Lakes are an inherent part of the society in Indian culture
and serve a variety of purposes. Rejuvenation of lakes is impact on biodiversity and
groundwater recharge of the city and surroundings.

Ramanagara Planning Authority has taken up the initiative to improve the waterbodies
coming under its jurisdiction with the Tank Rejuvenation Fee.

Thus, to preserve the waterbodies, and promote groundwater recharge, Improvements to

Ganakallu Tank in Ganakallu village has been initiated for the remaining works. A detailed
restoration plan has been prepared for the rejuvenation and over all development of the tank by
Ramanagara Planning Authority.

HANUMAN BUILDERS AND CONSULANT 9

Owner: PANCHAYATH RAJ ENGINEERING Improvement of Tank of Ganakallu Tank
DEPARTMENT RAMANAGAR

CHAPTER-II

INVENTORY AND CONDITION SURVEY

Inventory details
Inventory and condition survey has been carried out to propose the improvement as per requirement.

Details of Ganakallu Tank inventory is given as shown in table,

Table 0-1:inventory details of Ganakallu Tank

Name of the tank: Kemapahalli Tank Inventory Date:

Tank location details:
District: Ramanagara Taluk: Ramanagara
Hobli: Bidadi Village: Ganakallu
Toposheet reference: Basin/sub basin: -
Latitude: Easting:
Longitude: 12°46'15.2"N Northing:

Bund details:
Tank bund level: 770 m Bund height: 4.0 m
Bund length: 100 m Top width of the bund: 5.0 m
Average width of u/s side - Average Length of d/s -
slope: side slope:
Weir details :
`No. of weir and length: No
Shape of the Weist weir: -
Weist weir top width: -
Type of apron: -
Sluice details:
No. of sluice: -
Details: -
Sluice level: -
Sluice dimension: -

Condition Survey

The field survey of the Ganakallu Tank has been carried to observe the present condition of the tank.
The condition of following components has been studied,

 Tank bed
 Bund

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Owner: PANCHAYATH RAJ ENGINEERING Improvement of Tank of Ganakallu Tank
DEPARTMENT RAMANAGAR

Tank Bed
The findings with respect to condition survey of the tank are as follows:
The condition survey of the tank bed covers an area of 2610.4966 Sqm

 The tank bed is in partially full in condition.

 Tank bed is partially covered with Weeds
 Tank bed is partially covered with Weeds and Bushes
 Tank bed is silted.
Photographs of the tank bed are shown below,

Tank Bed is partially filled and Silted

Tank bund
The findings with respect to the condition survey of the tank bund are as follows:

 It is an Earthen bund having a length of 100 m.

 Bund top width 5.0 m and Average bottom width of 11.7 m.
 No Pitching is observed
 The bund side slopes are not in good condition.
Photographs of the tank bund are shown below,

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Owner: PANCHAYATH RAJ ENGINEERING Improvement of Tank of Ganakallu Tank
DEPARTMENT RAMANAGAR

Top Width of the bund covered with Bushes and weeds

Slopes are not in good condition (No Pitching is Observed)

Weist Weir

There is Weist water weir observed in the lake

Tank Sluice Gate

There is no sluice gate observed in the Tank.

Mother Nala

Only one nala should be observed.

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Owner: PANCHAYATH RAJ ENGINEERING Improvement of Tank of Ganakallu Tank
DEPARTMENT RAMANAGAR

CHAPTER-III

TANK DETAILS

The Ganakallu Tank falls in Ganakallu village, Ramanagara Taluk and District and tank details are
furnished as shown below,

Details of Ganakallu Tank

Table 0-1:Tank details of Ganakallu Tank

Name of the tank Ganakallu Tank

1 Location
1.1 District: Ramanagara Taluk: Ramanagara
1.2 Hobli Village: Ganakallu
1.3 Latitude 12°51'16.1"N Easting
1.4 Longitude 77°21'25.1"E Northing
2 Catchment Details
2.1 Basin/Sub Basin -
2.2 Catchment Area 372,410.88 Sqm
3 Command and Water Spread Area Details
3.1 Command Area -
3.2 Water Spread Area: 6314.496 Sqm ( 6.31Ha)
4 Storage and Water Utilization:
4.1 Storage Capacity: 0.145
4.2 Water Utilization: -
5 Bund
5.1 Type of Bund Mud Road
5.2 Bund Height 2.5 m
5.3 Bund Length 100
6 Weir
6.1 Weist weir width Weist Weir - FRL 770.00
6.2 Type of Apron - Length of apron -
along draft
channel:
7 Sluice Details
7.1 No of Sluices Gate -
7.2 Type of Sluice Gate -
7.3 Sluice Gate Level -
7.4 Sluice Gate Dimension -

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Owner: PANCHAYATH RAJ ENGINEERING Improvement of Tank of Ganakallu Tank
DEPARTMENT RAMANAGAR

CHAPTER-IV

TOPOGRAPHICAL SURVEY

Survey and Investigations

For detailed Establishment of GPS control points

Ground Control Points (X, Y) have been established at required interval all along the project area using
DGPS. All GCP’s are connected with reference B.M at Ganakallu Govt School and the B.M elevation has
been connected with nearby GTS B.M. The List of TBM & GPS Points enclosed as Annexure-1.

Topographical Survey

GANAKALLU

As per the terms of reference, it is necessary to do detailed survey by using DGPS/Total Station for fixing
the dam alignment and storage location. Topographical survey for all the 04 tanks is carried out.

Survey process has been explained in subsequent parts.

Survey has been done and contour map is prepared .capacity contour map is prepared with all
topographical features. contour map with google image background is prepared

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Owner: PANCHAYATH RAJ ENGINEERING Improvement of Tank of Ganakallu Tank
DEPARTMENT RAMANAGAR

Chapter-V

FINDINGS AND IMPROVEMENTS PROPOSED

The data obtained from the topographical survey, investigation, inventory and condition survey are
studied and analyzed to determine the extent of restoration required to fill the tank to their 75% storage
capacity. The details of the findings and improvements proposed are furnished in this chapter.

Tank Capacity
Total storage capacity, as per Zp tank register is 0.145 Mcft. The computed capacity, using contours
generated from topographic survey is shown in table. From the table below we can see that the capacity
of the tank is De-silting of the tank Bed is proposed to a depth of 0.9 m, which increases the tank capacity
by 0.04 Mcft.

Hence total Storage Capacity of the tank after de-silting is 0.185 Mcft.

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Owner: PANCHAYATH RAJ Improvement of Tank of Ganakallu Tank
ENGINEERING DEPARTMENT
RAMANAGAR

Table 0-1:Storage Capacity of Ganakallu Tank

ORIGINAL AREA CAPACITY TABLE OF GANAKALLU TANK

Sl Reservoir Contour Water Capacity between contours (m³) Capacity Cumulative Cumulative Cumulative
no Elevation interval spread (m³) capacity Capacity in Capacity in
. (m) (m) Area (m²) V = h/3 x [A1+A2+ √ A1A2] (m³) (MCM) (Mcft)

1 767.500 - 33.60 - -
2 768.000 0.50 2553.20 0.50/ 3 x [33.60 + 2553.20 + √33.60 x 2553.20 ] 439. 439. 0.00 0.015

3 768.500 0.50 5580.10 0.50/ 3 x [2553.20 + 5580.10 + √2553.20 + 5580.10 ] 1370. 1810. 0.001 0.063

4 769.000 0.50 5901.80 0.50/ 3 x [5580.10 + 5901.80 + √5580.10 + 5901.80 ] 1931. 3741. 0.003 0.132

5 770.00 0.09 6314.496 0.50/ 3 x [5901.80 + 6314.496 + √5901.80 + 6314.496 ] 369. 4111. 0.004 0.145

Water Spread Area @ 768.500m = 5580.10 Sqm

Water Spread Area @ 769.00m = 5901.80 Sqm
Water Spread Area @ FRL 770.00m = 6314.496 Sqm

Capacity of the tank @ FRL 769.089m= 0.145 Mcft

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Owner: PANCHAYATH RAJ ENGINEERING Improvement of Tank of Ganakallu Tank
DEPARTMENT RAMANAGAR

Tank Bed
The condition of tank bed is explained in condition survey chapters. As per Condition survey Tank bed is
partially full and has little growth of bushes and weeds.
Recommended action
Following restorations has been recommended based on the condition survey and Inventory details.

 Jungle clearance of the tank bed

 De-silting of 0.9 m is proposed in the tank bed.

Tank Bund
Tank Bund is with disturbed Slopes. Growth of bushes and Weeds have been found on d/s and u/s of
bund.
Recommended action

 Jungle clearances need to be done on the sides Slopes and top width.

 The bund need to be leveled, compacted with provision of extra casing material.

 The slope of the bund on U/S 2:1 and D/S is 1.5:1 is proposed

 Grip trenches of dimension 1.2*0.6m on the U/S is provided along the bund length in order to get
casing of the bund with the existing Bund.

 The pitching with 600mm thick hand packed rough stone revetment need to be newly provided on
the U/S side of the bund.

 Template walls dimension 0.3*0.3 m at a distance of 15m interval on the bund is provided.

 Washing Ghat is proposed for a length of 5.25m and breadth of 5m on the bund

 Fencing is provided all along the bund

Wiest Weir
There is no Wiest weir

Recommended action

Sluice Gate
There is no sluice gate
Images indicating the scenario of Ganakallu Tank over the period of years as depicted
on Google Earth.

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DEPARTMENT RAMANAGAR

Ganakallu Tank seen on Google Earth in the Year-2024

Ganakallu Tank seen on Google Earth in the Year-2023

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Owner: PANCHAYATH RAJ ENGINEERING Improvement of Tank of Ganakallu Tank
DEPARTMENT RAMANAGAR

Ganakallu Tank seen on Google Earth in the Year-2017

Ganakallu Tank seen on Google Earth in the Year-2013

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Owner: PANCHAYATH RAJ ENGINEERING Improvement of Tank of Ganakallu Tank
DEPARTMENT RAMANAGAR

Plan indicating the existing features of tank:

Existing Features of Ganakallu Tank

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Owner: PANCHAYATH RAJ ENGINEERING Improvement of Tank of Ganakallu Tank
DEPARTMENT RAMANAGAR

HYDROLOGY OF GANAKALLU TANK

To study the hydrological conditions and drainage characteristics of the catchment area
of the tank, ridgeline identification and demarcation of catchment boundary on toposheet is
adopted.

Catchment area of Ganakallu Tank is 612,662.74 sqm which is obtained

by delineating the watershed boundary using the Survey

CATCHMENT AREA MAP

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Owner: PANCHAYATH RAJ ENGINEERING Improvement of Tank of Ganakallu Tank
DEPARTMENT RAMANAGAR

1 Estimation of Yield from Seasonal Rainfall by Using Strange's Table Method.

Strange (1892) studied the available rainfall and runoff in the border areas of present- day
Maharashtra and Karnataka and has obtained yield ratios as functions of indicators
representing catchment characteristics. Catchments classified as good, average and bad
according to the relative magnitudes of yield they give by considering 50% dependable
monsoon rainfall.

According to the yielding qualities, catchments classified as good, bad and average. For a
certain rainfall, if the catchment yields a copious runoff, it is classified as good. If the
yield is poor, it is classified as bad. All those catchments lying between these two types
are classified as average catchments. In present study, based on Strange's table method of
Yield calculation for ‘Ganakallu Tank, catchment falls under Bad catchment.

Table 3.1: Strange's Table of Total monsoon rainfall and Estimated Run-off and Yield
per square area of catchment as follows:

HAD CATCHMENT
Total Monsoon
rainfall (mm) Depth of run-off Yield of run-off from
SI. No
catchment per Sq
due to rainfall (mm)
area (Mm3/km2)
1 2 3 4
1 25.40 0.0127 0.00001l
2 50.80 0.0506 0.000044
3 76.20 0.1524 0.000153
4 IO1.60 0.3556 0.000349
5 127.00 0.6350 0.000634
6 152.40 1.1430 0.001137
7 177.80 1.8542 0.001859
8 203.20 2.8448 0.002843
9 228.60 3.9678 0.004002

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10 254.00 5.4610 0.005456

11 279.40 7.2644 0.007260

12 304.80 9.4488 0.009447

13 330.20 11.8872 0.011884

14 355.60 14.7574 0.014749

15 381.00 17.9070 0.017909

16 406.40 21.3360 0.021331

17 431.80 25.0444 0.025038

18 457.20 29.2608 0.029258

19 482.60 33.5280 0.033533

20 508.00 38.1000 0.038103

21 533.40 42.9260 0.042938

22 558.80 48.3362 0.048337

23 584.20 53.7464 0.053750

24 609.60 59.4360 0.059435

25 635.00 65.4050 0.065405

26 660.40 71.9836 0.071987

27 685.80 78.5114 0.078525

28 711.20 85.3440 0.085348

29 736.60 92.4306 0.092444

30 762.00 I 00.2030 0.100200

31 787.40 107.8738 0.107870

32 812.80 115.8240 0.115830

33 838.20 124.0536 0.124050

34 863.60 132.9940 0.132990

35 889.00 141.7830 0.141790

36 914.40 150.8760 0.150880

37 939.80 160.2230 0.160240

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Owner: PANCHAYATH RAJ ENGINEERING Improvement of Tank of Ganakallu Tank
DEPARTMENT RAMANAGAR

BAD CATCHMENT
Total Monsoon
rainfall (mm) Depth of run-off Yield of run-off from
SI. No
due to rainfall
catchment per Sq
(mm) area (Mm3/km2)

38 955.20 170.3580 0.170350

39 990.60 180.2890 0.180290

40 1016.00 190.5000 0.190500

41 1041.40 200.9900 0.200990

42 1066.80 212.2930 0.212290

43 1092.20 223.3420 0.223360

44 1117.60 234.6960 0.234700

45 1143.00 245.3040 0.246320

46 1168.40 258.8010 0.258810

47 1193.80 270.9930 0.271000

48 1219.20 283.4640 0.283470

49 1244.60 296.2150 0.296220

50 1270.00 309.8800 0.309890

51 1295.40 323.1890 0.323210

52 1320.80 336.8040 0.336810

53 1346.20 350.6720 0.350690

54 1371.60 365.5310 0.365540

55 1397.00 379.9840 0.380000

56 1422.40 394.7160 0.394720

57 1447.80 409.7270 0.409740

58 1473.20 425.7550 0.425760

59 1498.60 441.3250 0.441360

60 1524.00 457.2000 0.457210

HANUMAN BUILDERS AND CONSULANT 24

Owner: PANCHAYATH RAJ ENGINEERING Improvement of Tank of Ganakallu Tank
DEPARTMENT RAMANAGAR

From the Stranger's table gives the yield per square area of catchment for monsoon
rainfall ranging from 25.4 mm to 1524mm. The yield is estimated as follows:

Yield = Yield per square area of catchment area * Independent catchment area

Table: 3.2 Annual Monsoon Rainfall for 30 years (1993-2024)- Ramanagara RG Station

SI.No Year Annual Rainfall SI.No Year Annual

Rainfall (mm)
(mm)

1 1993 536.60 17 2009 614.20

2 1994 572.80 18 2010 572.00
3 1995 581.10 19 2011 380.00
4 1996 972.60 20 2012 264.50
5 1997 656.50 21 2013 776.50
6 1998 531 .40 22 2014 491.00
7 1999 609.40 23 2015 548.18
8 2000 991.60 24 2016 319.68
9 2001 449.20 25 2017 835.35
10 2002 334.50 26 2018 406.89
11 2003 491.40 27 2019 623.99
12 2004 815.60 28 2020 687.70
13 2005 1009.20 29 2021 600.08
14 2006 279.80 30 2022 I 038.10
15 2007 498.90 31 2023 575.80

16 2008 622.00 32 2024 149.1

HANUMAN BUILDERS AND CONSULANT 25

Owner: PANCHAYATH RAJ ENGINEERING Improvement of Tank of Ganakallu Tank
DEPARTMENT RAMANAGAR

Table 3.3: 50% dependable Monsoon Rainfall for 30 years (1993-2024)- Ramanagara RG Station:

SI.No Year Annual Rainfall SI. No Year Annual Rail1fall

(mm) (mm)
I 2022 1038.10 17 1994 572.80
2 2005 1009.20 18 2010 572.00
3 2000 991.60 19 2015 548.l 8
4 1996 972.60 20 1993 536.60
5 2017 835.35 21 1998 531.40
6 2004 815.60 22 2007 498.90
7 2013 776.50 23 2003 491 .40
8 2020 687.70 24 2014 491.00
9 1997 656.50 25 2001 449.20
10 2019 623.99 26 2018 406.89
11 2008 622.00 27 201 I 380.00
12 2009 614.20 28 2002 334.50
13 1999 609.40 29 2016 319.68
14 2021 600.08 30 2006 279.80
15 1995 581.10 31 2012 264.500

16 2023 575.80 32 2024 149.1

Considering 50% dependable monsoon rainfall, Total annual monsoon rainfall for
Ganakallu Tank = 581.10 in the year (1995), obtained by arranging monsoon rainfall
in descending order, shown in the Table 3.3.
From the Strange's table by Interpolation, the yield runoff from catchment per Sq area (Sq
kms in Million cubic meter) is 0.053092.
Therefore, total Yield of run-off for the ‘Ganakallu Tank having an independent
catchment of 0. 614Sq.Km is= 0.053092*0.61* I 000

Total yield = 32.38

HANUMAN BUILDERS AND CONSULANT 26

Owner: PANCHAYATH RAJ ENGINEERING Improvement of Tank of Ganakallu Tank
DEPARTMENT RAMANAGAR

FLOOD ANALYSIS OF THE LAKE

Calculation of Maximum Flood Discharge (MFD) using Ryve's Formula:

Q=CA2t3

Were,
Q= Maximum Flood Discharge in Cumecs
A= Total Catchment
Area in Sq.Miles/Sq.Kms
C= Ryve's Coefficient

As per the MI Guidelines, for Catchment area between 0-13 Sq.Kms, the value of C is
given as 9.75 (pg.20 Ml Guidelines)

Total Catchment area (Sq.Km) Value of C MFD (Cumecs)

2.41 9.75 8.75

Exiling the Length of Weist weir based on

MFD:
Q=l.84 LH312
Where,
L= Length of the weir /waterway in m
H= depth of spillage over weir in m=0.9m
Therefore, the required length of the weir is 6.00m for maximum flood Discharge of
8.75Cumecs. Required length of outlet box culvert is 3.0m width x 1.50m depth

HANUMAN BUILDERS AND CONSULANT 27

Owner: PANCHAYATH RAJ ENGINEERING Improvement of Tank of Ganakallu Tank
DEPARTMENT RAMANAGAR

CHAPTER-VI

REJUVENATION PROPOSAL OF GANAKALLU TANK

Ganakallu Tank has undertaken development activities during the year 2025 using tank
rejuvenation fee with the estimated cost of rupees one twenty-five lakhs. The sanctioned
estimate developments include De-silting of tank bed, Embankment for bund formation,
Stone Pitching, Kerb Stones, Heavy duty Cobble stone for pavement, Providing and
Laying CC I :3:6.

The works which were implemented on site are de-silting of tank bed, embankment
formation and pitching. Other works were not executed and hence the remaining
sanctioned amount will be utilized for necessary tank development activities. The
components proposed for the tank in this DPR is as follows:

Construction of fence for tank boundary:

Present there is no tank boundary fencing for periphery of the tank except the periphery
adjacent to road side of length 50.00m. As per topographical survey the overall
periphery of the tank is 120.00m. Grill fencing is proposed for the length of 70.00 m
which includes Earthwork Excavation, Clearing and grubbing, providing PCC, coping,
Providing SSM, Providing flush/ Ruled pointing, Providing and fixing Steel work,
Painting Steel work. The Grill Fencing would result in protection of the tank from
future encroachment.

Construction of box culvert at inlet with.

As per the Flood analysis for the tank, there is a maximum flood discharge of
8.75cumecs. to surplus this quantity of flood safely it requires to provide a box culvert
as there is no existing inlet canal the flood. Hence a box culvert of 3.0rn width x 1.50m
depth is proposed at the inlet. Draft channel improvements are proposed for the
length of 35.00m.

Cleaning and de-silting of tank

The tank, inlet and out let canal fill with vegetation and silt , as per is code we can clean
and de-silted the 200 sqm of tank remaining tank fill with water, inlet ad outlet canal
clean and de-silted 200m length and depth of 0.45m

HANUMAN BUILDERS AND CONSULANT 28

Owner: PANCHAYATH RAJ ENGINEERING Improvement of Tank of Ganakallu Tank
DEPARTMENT RAMANAGAR

Cost Estimates
Estimates are prepared by using KPWD 2024-2025 SOR

Abstract and Detailed estimates are enclosed as Annexure1.

Total cost of the Ganakallu Tank for the improvements is 25,00,00.00/- Rupees

HANUMAN BUILDERS AND CONSULANT 29

 ABSTRACT
IMPROVEMENTS TO GANAKALLU KERE, GANAKALLU VILLAGE, BIDADI HOBLI
RAMANAGARA TALUK RAMANAGARA DISTRICT
Common SR -20232024
Si No Description Amount in Rs. Total Amount in Rs.
1 BOX CULVERT Rs. 2,37,605.36 Rs. 2,37,605.36
2 CLEANING and DE-SILTING Rs. 12,19,908.83 Rs. 12,19,908.83
3 PATH WAY AND FENCING Rs. 47,10,023.00 Rs. 47,10,023.00
4 WASTE WEIR Rs. 1,22,408.00 Rs. 1,22,408.00
SUB TOTAL-A Rs. 62,89,945
ADD 18% GST Rs. 11,32,190
SUB TOTAL-B Rs. 74,22,135
DPR CHARGES @ 1.125% ON "A" Rs. 70,761.88
MISC., AND ROUND OFF Rs. 7,102.80
GRAND TOTAL IN RS Rs. 75,00,000
 IMPROVEMENTS TO GANAKALLU KERE, GANAKALLU VILLAGE, BIDADI HOBLI
RAMANAGARA TALUK RAMANAGARA DISTRICT
BOX CULVERT SR 2023-24
DETAILED ESTIMATE MEASUREMENT
SL NO
PARTICULARS ITEM NO L B D QTY. UNIT RATE AMOUNT
1 Earth work in surface excavation by mechanical means for lowering & leveling the ground without blasting for all works other
than foundation in Ordinary/ Soft rock & depth not exceeding 300mm as per drawing and technical specifications, including
setting out, shoring, strutting, barricading, caution lights, removal of stumps and other deleterious matter including dressing of
excavated surfaces, disposing off or levelling the excavated earth or sorting & stacking the selected earth for reuse in a radius
of 50 m and lift upto 1.5 m including cost of labour, tools, usage of machinery & other appurtenances required to complete the
work (PWD CSR VOL I for the year 2023-24. I. No. 1.13 P.No. 08)
Basic Rate Rs. 362.00
Area Weightage 3% Rs. 10.86
Final Rate Rs. 372.86
CULVERT 1 3.00 3.00 1.20 10.80
WINGWALL 4 1.50 0.90 1.20 6.48
17.28 /m3 372.86 6,443.02
PLAIN CEMENT CONCRETE M10
2 Providing and laying in position plain cement concrete for levelling course for all works in foundation. The granite/trap/basalt
crushed graded coarse aggregates and fine aggregates as per relevant IS Codes machine mixed, laid in layers not exceeding
150 mm thickness, well compacted using plate vibrators, including all lead & lifts, cost of all materials of quality, labour,
Usage charges of machineries, curing, and all the other appurtenances required to complete the work as per technical
specifications. (The cost of steel reinforcement & formwork shall be paid separately) Mix 1:3:6 (M10) Using 40 mm
nominal size graded crushed coarse aggregates (PWD CSR VOL I for the year 2023-24. I. No. 2.1.3 P.No. 15)

Basic Rate Rs. 5989.00

Area Weightage 3% Rs. 179.67
Final Rate Rs. 6168.67
CULVERT 1 3.00 3.00 0.13 1.13
WINGWALL 4 1.50 0.90 0.13 0.68
1.80 /m3 6,168.67 11,103.61
RCC WORK
3 Providing and laying in position Reinforced cement concrete for all Super structures of building , Road works, Water works,
Irrigation works & super structure works of bridges upto 3.50 m height. The granite/trap/basalt crushed graded coarse
aggregates and fine aggregates as per relevant IS Codes machine mixed with super plasticisers laid in layers, well compacted
using needle vibrators. The cost includes all lead & lifts, cost of all materials, quality confirming to the requirements of
relevant IS codes , labour, Usage charges of machinery, curing and all other appurtenances required to complete the work as
per technical specifications. (The cost of steel reinforcement, dowel bars & formwork to be paid separately) M25 Design Mix
Using 20 mm nominal size graded crushed coarse aggregates (PWD CSR VOL I for the year 2023-24. I. No. 2.5.1 P.No.
17)

Rs. 6630.00
Area Weightage 3% Rs. 198.90
Shuttering8% Rs. 530.40
Final Rate Rs. 7359.30
CULVERT RAFT 1 3.00 3.00 0.45 4.05
WINGWALL RAFT 4 1.50 0.75 0.30 1.35
5.40 /m3 7,359.30 39,740.22

4 Providing and laying in position Reinforced cement concrete for all Super structures of building , Road works, Water works,
Irrigation works & super structure works of bridges upto 3.50 m height. The granite/trap/basalt crushed graded coarse
aggregates and fine aggregates as per relevant IS Codes machine mixed with super plasticisers laid in layers, well compacted
using needle vibrators. The cost includes all lead & lifts, cost of all materials, quality confirming to the requirements of
relevant IS codes , labour, Usage charges of machinery, curing and all other appurtenances required to complete the work as
per technical specifications. (The cost of steel reinforcement, dowel bars & formwork to be paid separately) M25 Design Mix
Using 20 mm nominal size graded crushed coarse aggregates (PWD CSR VOL I for the year 2023-24. I. No. 2.5.1 P.No.
17)

Rs. 6630.00
Area Weightage 3% Rs. 198.90
Shuttering20% Rs. 1326.00
Final Rate Rs. 8154.90
HEAD WALL 2 3.00 0.45 1.50 4.05
 4.05 /m3 8,154.90 33,027.35

5 Providing and laying in position Reinforced cement concrete for all Super structures of building , Road works, Water works,
Irrigation works & super structure works of bridges upto 3.50 m height. The granite/trap/basalt crushed graded coarse
aggregates and fine aggregates as per relevant IS Codes machine mixed with super plasticisers laid in layers, well compacted
using needle vibrators. The cost includes all lead & lifts, cost of all materials, quality confirming to the requirements of
relevant IS codes , labour, Usage charges of machinery, curing and all other appurtenances required to complete the work as
per technical specifications. (The cost of steel reinforcement, dowel bars & formwork to be paid separately) M25 Design Mix
Using 20 mm nominal size graded crushed coarse aggregates (PWD CSR VOL I for the year 2023-24. I. No. 2.5.1 P.No.
17)
Basic Rate Rs. 6630.00
Area Weightage 3% Rs. 198.90
Shuttering20% Rs. 1326.00
Final Rate Rs. 8154.90
SLAB 1 3.00 3.00 0.30 2.70
2.70 /m3 8,154.90 22,018.23

6 Providing and laying in position Reinforced cement concrete for all Super structures of building , Road works, Water works,
Irrigation works & super structure works of bridges upto 3.50 m height. The granite/trap/basalt crushed graded coarse
aggregates and fine aggregates as per relevant IS Codes machine mixed with super plasticisers laid in layers, well compacted
using needle vibrators. The cost includes all lead & lifts, cost of all materials, quality confirming to the requirements of
relevant IS codes , labour, Usage charges of machinery, curing and all other appurtenances required to complete the work as
per technical specifications. (The cost of steel reinforcement, dowel bars & formwork to be paid separately) M25 Design Mix
Using 20 mm nominal size graded crushed coarse aggregates (PWD CSR VOL I for the year 2023-24. I. No. 2.5.1 P.No.
17)

Basic Rate Rs. 6630.00

Area Weightage 3% Rs. 198.90
Shuttering20% Rs. 1326.00
Final Rate Rs. 8154.90
WING WALL 4 1.50 0.30 0.90 1.62
1.62 /m3 8,154.90 13,210.94

T.M.T STEEL
7 Providing Thermo-Mechanically Treated bars of grade Fe-550 or more Steel reinforcement for R.C.C. work including
straightening, cutting, bending, placing in position, binding and anchoring to adjacent members whereever necessary complete
as per Design including cost of material, labour, usage charges complete as per specifications. (The laps and wastages shall
not be measured separately) (PWD SR for Buildings VOL I for the year 2023-24. I. No. 2.11 P.No. 18)
Basic Rate Rs. 79011.00
Area Weightage3% Rs. 2370.33
Final Rate Rs. 81381.33

TMT Steel Fe500 1.38 /Ton 81,381.33 1,12,062.00

FOOTING 5.40 100.00 Kg/Cum 540.00
HEAD Wall 4.05 100.00 Kg/Cum 405.00
SLAB 2.70 100.00 Kg/Cum 270.00
WING WALL 1.62 100.00 Kg/Cum 162.00
1377.00
TOTAL AMOUNT 2,37,605.36
 IMPROVEMENTS TO GANAKALLU KERE, GANAKALLU VILLAGE, BIDADI HOBLI
RAMANAGARA TALUK RAMANAGARA DISTRICT

CLEANING and DE-SILTING SR 2023-24

DETAILED ESTIMATE MEASUREMENT
SL NO
PARTICULARS ITEM NO L B D QTY. UNIT RATE AMOUNT
JUNGLE CLEANING
1 Clearing and grubbing road land including uprooting rank vegetation, grass, bushes, shrubs, saplings and trees girth up to
300 mm, removal of stumps of trees cut earlier and disposal of unserviceable materials and stacking of serviceable material
to be used or auctioned, including removal and disposal of top organic soil not exceeding 150 mm in thickness.In area of
light jungle (PWD CSR VOL III for the year 2023-24. I. No.2.5 (ii)a P.No. 09)

Basic Rate Rs. 393.00

Area Weightage 3% Rs. 11.79
Final Rate Rs. 404.79
TOP BUND 1 200.00 3.00 600.00
U/S BUND 1 750.00 3.00 2250.00
D/S BUND 1 100.00 4.00 400.00
3250.00 m2
32.50 /100m2 404.79 13,155.68

Providing compacted embankment for field irrigation channels with gravelly soil from approved borrow area in layers of
100 to 150 mm thickness (before compaction) including cost of all materials, machinery, labour, all other operations such
as collection of soil, spreading in layer of specified thickness, sorting-out, breaking clods, levelling, watering, compacting
as directed, dressing sides to required slope and all other ancillary operations complete. (PWD CSR VOL IV for the year
2023-24. I. No.3.9 P.No. 48)
Basic Rate Rs. 489.00
Area Weightage 3% Rs. 14.67
Final Rate Rs. 503.67

1 150.00 3.00 0.45 202.50

202.50 /m3 503.67 1,01,993.18
SOTNE REVETMENT
3 providing and constructing 550 mm thick hand packed rough stone revetment consisting of 300 mm thick rough stones with
400 to 450 mm long through stones at 1.5 m c / c over filter backing of 100 mm thick sand and 150 mm thick 40 mm down
graded coarse aggregate layers including cost of all materials, machinery, labour, laying to specified slope, wedging with
chips, finishing & all necessary works as directed and complete as per specification. (PWD CSR VOL IV for the year
2023-24. I. No. 1.5 P.No.129)
Rs. 946.00
Area Weightage 3% Rs. 28.38
Final Rate Rs. 974.38
D/S BUND 1 340.00 3.00 1020.00
1020.00 /m2 974.38 9,93,867.60
CLENING AND DE-SILTING
JUNGLE CLEANING
1 Clearing and grubbing road land including uprooting rank vegetation, grass, bushes, shrubs, saplings and trees girth up to
300 mm, removal of stumps of trees cut earlier and disposal of unserviceable materials and stacking of serviceable material
to be used or auctioned, including removal and disposal of top organic soil not exceeding 150 mm in thickness.In area of
light jungle (PWD CSR VOL III for the year 2023-24. I. No.2.5 (ii)a P.No. 09)
Basic Rate Rs. 393.00
Area Weightage 3% Rs. 11.79
Final Rate Rs. 404.79
CANAL SIDE 2 750.00 2.00 3000.00
CANAL BOTTOM 1 750.00 1.00 750.00
LAKE 1 150.00 50.00 7500.00
11250.00 m2
112.50 /100m2 404.79 45,538.88
 DE-SILTING
2 De-silting of Feeder Channel/Canal in dry condition by excavating the deposited bed material and disposing off the same by
stacking/ formation of Embankment or as directed including cost of all machinery, labour & all necessary works as directed
and complete as per specification. (PWD CSR VOL IV for the year 2023-24. I. No.3.13 P.No. 140)
Basic Rate Rs. 94.00
Area Weightage 3% Rs. 2.82
Final Rate Rs. 96.82

1 750.00 1.00 0.30 225.00

1 500.00 250.00 0.90 450.00
675.00 /m3 96.82 65,353.50
TOTAL AMOUNT 12,19,908.83
 IMPROVEMENTS TO GANAKALLU KERE, GANAKALLU VILLAGE, BIDADI HOBLI RAMANAGARA TALUK
RAMANAGARA DISTRICT

SL NO
PARTICULARS ITEM NO L B D QTY. UNIT RATE AMOUNT
1 Earth work excavation for Foundation by mechanical means for all works & depth upto 3 m, as per drawing and
technical specifications, including setting out, shoring, strutting, barricading, caution lights, including dressing
of excavated surfaces, disposing off or levelling the excavated earth or sorting & stacking the selected earth for
reuse in a radius of 50 m and lift upto 1.5 m including cost of labour, tools, usage of machinery & other
appurtenaces required to complete the work. In all kinds of soils Depth upto 3 m. (P.No. 8 I.No. 1.14 of PWD
SR 2023-24) Vol-1
Basic rate 102.00 dfr
AW 3% 3.06
Total 105.06
Foundation 1 300.00 0.75 0.50 112.50
112.50 Cum 105.06 11819.00
2 Providing and laying in position plain cement concrete for levelling course for all works in foundation. The
granite/trap/basalt crushed graded coarse aggregates and fine aggregates as per relevant IS Codes machine
mixed, laid in layers not exceeding 150 mm thickness, well compacted using plate vibrators, including all lead &
ifts, cost of all materials of quality, labour, Usage charges of machineries, curing, and all the other
appurtenances required to complete the work as per technical specifications. (The cost of steel reinforcement &
formwork
Basic rateshall be paid separately) Mix 1:4:8( M5) Using 40 mm nominal size graded crushed coarse
5664.00
AW 3% 169.92
Total 5833.92
Foundation 1 300.00 0.75 0.075 16.88
16.88 Cum 5833.92 98447.00
3 Providing Size Stone masonry with hard stone in foundation & plinth with Cement mortar 1:6 (1 cement : 6
coarse sand)(P.No.9 I.No.5.4 of PWD SR 2023-24)Vol-2

Basic rate 6389.00

AW 3% 191.67
Total 6580.67
1 300.00 0.60 0.2036.00
Foundation
1 300.00 0.45 0.4054.00
90.00 Cum 6580.67 592260.00
3 Providing ruled pointing to coursed stone masonry with lime mortar 1:3,20mm deep, after raking joints to depth
of 20mm nicely lining, includingcost all materials, labour, usage charges of machinery, curing completeas per
specification.(P.No.214 I.No.21.10 of PWD SR 2023-24)Vol-2
Basic rate 299.00
AW 3% 8.97
Total 307.97
Pointing 2 300.00 0.60 360.00
360.00 Sqm 307.97 110869.00
4 Providing and laying in position Reinforced cement concrete for all Super structures of building , Road works,
Water works, Irrigation works & super structure works of bridges upto 3.50 m height. The granite/ trap/basalt
crushed graded coarse aggregates and fine aggregates as per relevant IS Codes machine mixed with super
lasticisers laid in layers, well compacted using needle vibrators. The cost includes finsishing concrete structure
in line, all lead & lifts, cost of all materials, quality confirming to the requirements of relevant IS codes , labour,
Usage charges of machinery, curing and all other appurtenances required to complete the work as per technical
specifications. (The cost of steel reinforcement, dowel bars & formwork to be paid separately) M20 Design Mix
Using 20 mm nominal size graded crushed coarse aggregates (P.No. 17 I.No.2.5.1 of PWD SR 2023-24)
Vol-1

Basic rate 6630.00

AW 3% 198.90
50% for shuttering 3315.00
Total 10143.90
PB 1 300.00 0.45 0.125 16.88
16.88 Cum 10143.90 171178.00
5 Supplying, fitting and placing TMT FE 550 / 550D Steel Reinforcement including cost of all materials,
machinery, labour, cleaning, straightening, cutting, bending, hooking, laping/welding joints, tying with binding
wire / soft annealed steel wire and other ancilary operations complete as per drawing and technical
specification.Buildings (P.No.18 I.No. 2.11 a of PWD SR 2023-24) Vol-1
 Basic rate 89457.00
AW 3% 2683.71
Total 92140.71
at 80 kg per m3 1350.00 kgs
1.350 Tonne 92140.71 124390.00
Providing and fixing Steel work in built up tubular (round, square or rectangular hollow tubes etc.) trusses etc.,
including cutting, hoisting, fixing in position and applying a priming coat of approved steel primer,
including welding and bolted with special shaped washers etc. complete. Hot finished welded type tubes
6
including cost of materials, labour, usage charges of machinery complete as per specifications and as per
directions of the Engineer-in-Charge ,(Item no 11.16.3 Pg No. 83 PWD SR2023-24)Vol-2

Basic rate 122.00

AW 3% 3.66
Total 125.66
80mm X 80mm, 3.2mm thick
Poles 121 2.25 272.25
272.25 m
at 7.51 kg/m 2044.60
50mm X 25mm, 2.6mm thick
Fencing
Horizontal pipe 2 300.00 600.00
600.00 m
at 2.71kg/m 1626.00
15mm X 15mm,Hallow tube
Grill 1 300.00 1.50 450.00 Sqm
at 30kg/Sqm 13500.00
Net weight 17170.60
Total : 17170.60 Kgs 125.66 2157657.00

8 Supplying and fixing M15 grade precast cement concrete Kerb stones for Roadway, Sidewalls and gutters fixed
with CM 1:3 fixed and finsihed in line as per direction of Engineer in charge. (The cost of PCC shall be paid
extra) 600 x 300 x 100 mm size(P.No.74 I.No.8.42.6 of PWD SR 2023-24)Vol-3

Basic rate 266.00

AW 3% 7.98
Total rate 273.98
kerb stone PCC 1 300.00 300.00
300.00 m 273.98 82194.00
9 Providing, laying, spreading and compacting stone aggregates of specific sizes to water bound macadam
specification including spreading in uniform thickness, hand packing, rolling with vibratory roller in stages to
proper grade and camber, applying and brooming requisite type of screening/ binding Materials to fill up the
interstices of coarse aggregate, watering and compacting to the required density.By Manual Means, Grading-I
(63 mm to 45 mm),Using Screening Crushable type such as Moorum or Gravel(P.No.25 I.No.4.13 404 A (i) a
of PWD SR 2023-24)Vol-3
Basic rate 2523.00
AW 3% 75.69
Narega rate 2598.69
Walking path 1 300.00 3.00 0.075 67.50
67.50 Cum 2598.69 175412.00
10 Providing and laying 60mm thick factory made precast M -30 grade Cement Concrete Paver Block as per IRC
SP 63:2018 & IS 15658 for Cycle Tracks & Pedestrian Footpaths of approved shape and colour, laid in required
pattern and including over 30mm thick compacted bed of coarse sand, filling the joints with fine sand etc. all
complete as per the direction of Engineer-incharge. (WMM/WBM Base to be paid separately if necessary as per
relevant technical specification)(P.No.51 I.No.6.8.1 of PWD SR 2023-24)Vol-3

Basic rate 1068.00

AW 3% 32.04
Narega rate 1100.04
Walking path 1 300.00 3.00 900.00
900.00 Sqm 1100.04 990036.00
11 Painting with synthetic enamel paint of approved brand and manufacture of required colour to give an even
shade :Two coats on new work over an under coat of suitable shade with ordinary paint of approved brand and
manufacture after thoroughly brooming the surface to remove all dirt, dust, mortar drops and foreign matter
including preparing the surface even and sand paper smooth, cost of materials, labour complete as per
specifications and as per directions of Engineer-in-charge.( I.No. 8.41 of PWD SR 2023-24)Vol-2

Basic rate 167.00

AW3% 5.01
Total 172.01
Poles 121 1.50 0.32 58.08
Horizontal pipe 2 300.00 0.15 90.00
Grill 1 300.00 1.50 450.00
SSM 2 300.00 0.60 360.00
Kerbstone 2 300.00 0.30 180.00
1138.08 sqm 172.01 195761.00

Sub Total ₹ 47,10,023.00

 IMPROVEMENTS TO GANAKALLU KERE, GANAKALLU VILLAGE, BIDADI HOBLI RAMANAGARA TALUK
RAMANAGARA DISTRICT
SL NO
PARTICULARS ITEM NO L B D QTY. UNIT RATE AMOUNT
1 Earth work excavation for Foundation by mechanical means for all works & depth upto 3 m, as per drawing and
technical specifications, including setting out, shoring, strutting, barricading, caution lights, including dressing
of excavated surfaces, disposing off or levelling the excavated earth or sorting & stacking the selected earth for
reuse in a radius of 50 m and lift upto 1.5 m including cost of labour, tools, usage of machinery & other
appurtenaces required to complete the work. In all kinds of soils Depth upto 3 m. (P.No. 8 I.No. 1.14 of PWD
SR 2023-24) Vol-1

Basic rate 102.00 dfr

AW 3% 3.06
Total 105.06
Foundation 1 15.00 1.00 1.00 15.00
15.00 Cum 105.06 1576.00
2 Providing and laying in position plain cement concrete for levelling course for all works in foundation. The
granite/trap/basalt crushed graded coarse aggregates and fine aggregates as per relevant IS Codes machine
mixed, laid in layers not exceeding 150 mm thickness, well compacted using plate vibrators, including all lead &
ifts, cost of all materials of quality, labour, Usage charges of machineries, curing, and all the other
appurtenances required to complete the work as per technical specifications. (The cost of steel reinforcement &
formwork shall be paid separately) Mix 1:4:8( M5) Using 40 mm nominal size graded crushed coarse
aggregates(P.No.15 I.No.2.1.2 of PWD SR 2023-24)Vol-1
Basic rate 5664.00
AW 3% 169.92
Total 5833.92
Foundation 1 15.00 1.00 1.13
0.075
1.13 Cum 5833.92 6563.00
3 Providing Size Stone masonry with hard stone in foundation & plinth with Cement mortar 1:6 (1 cement : 6
coarse sand)(P.No.9 I.No.5.4 of PWD SR 2023-24)Vol-2
Basic rate 6389.00
AW 3% 191.67
Total 6580.67
1 15.00 0.75 0.45 5.06
Foundation
1 15.00 0.50 0.45 3.38
8.44 Cum 6580.67 55524.00
3 Providing ruled pointing to coursed stone masonry with lime mortar 1:3,20mm deep, after raking joints to depth
of 20mm nicely lining, includingcost all materials, labour, usage charges of machinery, curing completeas per
specification.(P.No.214 I.No.21.10 of PWD SR 2023-24)Vol-2

Basic rate 299.00

AW 3% 8.97
Total 307.97
Pointing 2 15.00 0.60 18.00
18.00 Sqm 307.97 5543.00
4 Providing and laying in position Reinforced cement concrete for all Super structures of building , Road works,
Water works, Irrigation works & super structure works of bridges upto 3.50 m height. The granite/ trap/basalt
crushed graded coarse aggregates and fine aggregates as per relevant IS Codes machine mixed with super
lasticisers laid in layers, well compacted using needle vibrators. The cost includes finsishing concrete structure
in line, all lead & lifts, cost of all materials, quality confirming to the requirements of relevant IS codes , labour,
Usage charges of machinery, curing and all other appurtenances required to complete the work as per technical
specifications. (The cost of steel reinforcement, dowel bars & formwork to be paid separately) M20 Design Mix
Using 20 mm nominal size graded crushed coarse aggregates (P.No. 17 I.No.2.5.1 of PWD SR 2023-24)
Vol-1
Basic rate 6630.00
AW 3% 198.90
50% for shuttering 3315.00
Total 10143.90
PB 1 15.00 0.45 0.450 3.04
3.04 Cum 10143.90 30812.00
5 Supplying, fitting and placing TMT FE 550 / 550D Steel Reinforcement including cost of all materials,
machinery, labour, cleaning, straightening, cutting, bending, hooking, laping/welding joints, tying with binding
wire / soft annealed steel wire and other ancilary operations complete as per drawing and technical
specification.Buildings (P.No.18 I.No. 2.11 a of PWD SR 2023-24) Vol-1

Basic rate 89457.00

AW 3% 2683.71
Total 92140.71
at 80 kg per m3 243.00 kgs
0.243 Tonne 92140.71 22390.00
Sub Total ₹ 1,22,408.00
 Rain-Gauge Station Code: 20302 Taluk: ramanagar District: Ramanagara
Total Total
Year Total Monthly rainfall (mm)
Annual Monsoon
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec mm mm
1993 0 0 0 53.4 62 144 23 121.3 115.5 132.8 43.8 63.2 759.00 536.60
1994 0 0 0 119 126.5 64.3 71.5 45.1 89.7 302.2 25.8 0 844.10 572.80
1995 1.2 0 0 41.4 62.8 83.8 20 180.8 158.9 137.6 50.8 0 737.30 581.10
1996 0 7 0 59 58.6 190.2 101.4 188.4 205.4 287.2 0 40.8 1138.00 972.60
1997 0.00 0.00 46.00 38.40 55.80 37.00 40.20 120.60 188.50 270.20 116.20 26.00 938.90 656.50
1998 0.00 0.00 0.00 86.50 39.80 32.20 148.20 183.60 79.20 88.20 72.60 11.20 741.50 531.40
1999 0.00 0.00 0.00 100.00 107.40 56.00 9.60 75.40 97.00 371.40 84.00 9.40 910.20 609.40
2000 0.00 10.60 0.00 27.00 67.20 68.00 70.80 220.60 197.00 435.20 30.00 4.00 1130.40 991.60
2001 16.00 0.00 0.00 54.20 24.80 0.00 19.40 70.80 228.00 131.00 41.80 0.00 586.00 449.20
2002 0.00 0.00 0.00 13.00 48.50 50.60 32.60 5.60 152.10 93.60 17.00 0.00 413.00 334.50
2003 0.00 0.00 14.40 25.40 10.60 47.80 62.00 75.50 32.00 274.10 9.20 0.00 551.00 491.40
2004 0.00 38.60 2.00 72.00 155.30 150.00 163.20 23.00 221.00 258.40 5.00 0.00 1088.50 815.60
2005 12.00 0.00 35.00 134.00 124.40 67.00 120.00 118.60 189.00 514.60 134.00 22.00 1470.60 1009.20
2006 0.00 0.00 86.00 0.00 88.00 94.00 19.60 34.00 48.20 84.00 89.00 0.00 542.80 279.80
2007 0.00 0.00 0.00 49.20 112.00 58.60 92.60 90.60 69.00 188.10 43.00 37.00 740.10 498.90
2008 0.00 0.00 60.00 33.50 85.20 9.00 98.00 231.20 158.50 125.30 65.00 2.00 867.70 622.00
2009 0.30 0.20 42.50 27.10 233.10 89.40 38.00 198.50 262.40 25.90 63.90 25.10 1006.40 614.20
2010 1.70 0.00 11.20 113.40 148.50 79.00 149.30 143.40 70.00 130.30 182.60 1.30 1030.70 572.00
2011 0.00 29.00 11.00 122.50 182.00 35.00 84.50 71.50 25.00 164.00 31.50 4.00 760.00 380.00
2012 0.00 0.00 0.00 51.50 34.50 6.50 69.00 69.00 21.00 99.00 1.00 4.00 355.50 264.50
 Rain-Gauge Station Code: 20302 Taluk: ramanagara District: Ramanagara
Total Total
Year Total Monthly rainfall (mm) Annual Monsoon
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec mm mm

2013 0.00 2.50 11.50 27.00 93.50 91.50 97.50 159.50 254.00 174.00 40.00 0.50 951.50 776.50
2014 0.00 0.50 51.90 18.50 207.50 145.00 15.50 54.50 116.00 160.00 0.00 0.00 769.40 491.00
2015 0.18 0.61 20.47 113.33 161.69 59.06 29.76 163.77 185.02 110.57 192.20 6.52 1043.18 548.18
2016 0.90 0.07 8.77 23.16 95.61 53.59 170.83 55.14 16.98 23.14 5.23 58.28 511.70 319.68
2017 3.38 0.03 23.00 42.21 261.34 27.82 32.19 216.86 328.82 229.66 40.54 13.80 1219.65 835.35
2018 0.12 6.43 28.24 31.85 185.23 89.17 35.52 62.99 137.18 82.03 15.89 1.73 676.38 406.89
2019 10.13 2.91 0.97 47.00 87.94 35.26 45.36 131.37 171.72 240.28 88.64 10.39 871.97 623.99
2020 0.30 0.10 21.80 76.30 119.90 113.90 152.00 57.00 206.50 158.30 41.40 21.60 969.10 687.70
2021 21.49 9.99 0.47 72.51 72.23 61.80 123.58 79.44 122.98 212.28 244.33 37.72 1058.82 600.08
2022 0.58 0.00 9.30 52.34 227.48 117.16 135.99 359.14 122.63 303.15 75.22 35.11 1438.10 1038.07
2023 0.0 0.0 19.0 54.4 213.2 34.6 55.0 56.6 162.0 75.6 56.4 2.0 728.8 575.80
2024 0.00 0.00 0.00 2.00 32.00 27.00 43.00 47.1 17.00 47.00 16.00 - - 149.1
II. DESIGN DETAILS OF BOX CULVERT
2. Materials:
1. Box Details:
Grade of Concrete - M25 (Moderate) Grade of Steel -
Fe500
Clear cover - 75mm

III. DESIGN PARAMETERS FOR RCC DESIGN

1. Reinforcement: (Ref :- IRC.112-2001)

Grade of steel - Fe500

Characteristic strength of steel (fy) - 500N/mm^2
Material Factor (ϒs) - 1.15
Modulus of Elasticity (Es) - 20000 N/mm2

2. Concrete:(Ref:- IRC-112-2011)

Grade of Concrete - M25 (Moderate)

Characteristic strength of steel (fck) - 25 N/mm^2
Material Factor (ϒs) - 1.5
Coefficient of Friction (μ) - 0.50
Modulus of Elasticity (Ec) - 25000 N/mm2
Design value considered (0.446*fck) - 11.15 N/mm2

3. Constants:

Modular Ratio M = Es(1+ φ) / Ec

VII. LOAD CALCULATIONS

1. Dead Load (Ref:-IRC: 6-2014)

Volume of top slab = 2 x 5.45 x 0.75 x 1 = 8.175 m3

Volume of bottom slab = 2 x 5.45 x 0.70 x 1 = 7.63 m3
Volume of side walls = 2 x 7.725 x 0.5 x 1 = 7.725 m3
Volume of Mid wall = 7.725 x 0.4 x 1 = 3.09 m3
Total volume = 26.62 m3
Therefore, total weight of concrete = 26.62 x 25 = 665.5
KN Effective width = 0.25 + 5 +0.4 +5 +0.25 = 10.9 m
. Therefore, Base pressure due to self-weight = 665.5/10.9
× 1 = 61.05KN/m

2. Earth Pressure:

Fig . 2 Earth Pressure

3. Load Calculation : Earth pressure at base due to submerged earth = (20-10) x
3.1 Top Slab : 8.5 x 0.5 = 42.5 KN/𝑚2 Earth Pressure due to live load =
3.1.1. Dead Load : 0
Weight of wearing course: 4. Base Pressure:
= 0.065 x 22 4.1 Dead Load:
= 1.43 KN/𝑚2 = So we provide 2 KN/𝑚2 (0.065 –
Wearing coat thickness) Load from top state and walls including wearing course =
Self weight of top state 51.45 KN/𝑚2 Self weight of Bottom Slab = 0.7 x 25
= 0.75 x 25 = 17.5 KN/𝑚2
=18.75 KN/𝑚2 Total Load = 68.95 KN/𝑚2

Total = DL + LL = 20.75 KN/𝒎𝟐 4.2 Live Load:

3.1.2 Live Load (I) There is no live load coming from top slab without
Dispersal perpendicular to span impact = 21 KN/ 𝑚2
= 0.84 + 2 x 0.065 (T.L + L.L) Bare pressure = 89.95 KN/𝑚2 (Is safe for
= 0.97 m S.B.C of 150 KN/𝑚2)
Dispersal in span direction
= 4.57 + 2 x t IX. MOMENT CALCULATION
t = 0.065
= 4.57 + 2 x 0.065 1. Top Slab:
= 4.7 m F.E.M due to Dead Load = 20.75 x 8.5 x 8.5/12
= 124.93 KNm.
P/A = 350/ 4.7 x 0.97 F.E.M due to Live Load = 95.96 x 8.5 x 8.5/12
= 76.771N/𝑚2 = 577.76 Knm. Total F.E.M = 702.69 KNm
(25 % of 76.77 KN/𝑚2) Mid span moment due to dead load = 20.75 x 8.8 x8.5/8 =
187.41 KNm. Mid span moment due to Live load = 95.8.5
Total Load : x 8.5/8 = 134.6 KNm.
D.L + L.L = 20.75 + 95.96=116.7125 KN/𝒎𝟐s Total mid span moment due to live load = 866.66 KNm.

3.2 Bottom Slab : 2. Bottom Slab:

3.2.1. Dead Load : F.E.M due to Dead Load = 51.45 x 8.5 x 8.5/12 = 309.772
KNm.
Load from top slab = 20.75 KN/𝑚2 F.E.M due to Live Load = 21x 8.5 x 8.5/12 = 126.44
Load of walls = 10 (0.5x2+0.4) x25/11.4 KNm.
= 51.45 KN/𝑚2 Total F.E.M = 436.21KNm.
Mid span moment due to dead load = 51.45 x 8.5 x 8.5/8
3.2.2. Live Load: = 464.66 KNm. Mid span moment due to Live load = 21 x
8.5 x 8.5/8 = 189.656 KNm. Total mid span moment due
(Dispersed Live Load) to live load = 654.32 KNm.
Live load = 21 KN/𝑚2 (As per IRC 6 - 2014, Clause -
208) Total Load = DL + LL 3. Side Wall:
= 72.45 KN/𝑚2 Box empty, surcharge load on side fill F.E.M at top due to
dead load :
3.2.3 Side Wall: = 85 x 8.5 x8.5/30
= 204.71 KNm.
C-1 Box empty earth premier at bare due to live load F.E.M due to live load at top = 12x 8.5 x 8.5/12
surcharge: = 72.25 KNm.
= 1.2 x 0.5 x 20 Total fixed end moment at top = 276.96 KNm.
= 12 KN/𝑚2 F.E.M due to dead load at base = 85 x 8.5 x 8.5/20
C-2 Box empty earth Pressure at bar due to earth fill: = 307.1 KNm.
= 20 x 0.5 x 8.5 F.E.M due to Live load at base = 72.25 KNm.
= 85 KN/𝑚2 Total F.E.M at base = 379.313 KNm.
C-3 Box full Live Load surcharge on side fill: Mid span moment due to dead load :
Earth pressure at base due to live load Surcharge = 12 = 85 x 8.5 x 8.5/16
KN/𝑚2 = 383.83 KNm.
Mid span moment due to live load = 12 x 8.5 x 8.5/8
= 108.375 KNm.
Total mid span moment = 492.1 KNm. 3.2 Moment due to Breaking force :

MAD = MDA = MCB = MBC = 169.79x8.5/2

X. MOMENT DISTRIBUTION = 721KNm.
After distribution of moment among all the members a
Distribution factor = 0.5 moment of 46.155KNm is equal to 46.2 KNm is obtained.
Table no. 2 Moment Dstributon
Table no.3 Moment due to Breaking force

Load Case MaximumDistributed moments at

supports
MAB MDC MAD MDA
Total Max of all 528.8 452.3 528.8 452.3
Load cases
B.F Distributed 361 361 361 361
momentsatsupport
Design Support 889.8 813.3 889.8 813.3
Moments moments
including
breaking

4. Moment and reinforcement at salient section :

4.1 Top Slab :

Maximum Moment Support/ Midspan including breaking
= 121.83 KNm Depth req = ((889.8 x 102)/(1000 x k))
1. Maximum Support Moments: k = Moment of Resistance (Constant) = 1.105 Mpa
= ((889.8 x 102) / (1000 x 1.105))
MAB = 528.8 KNm MDC = 452.31 KNm MAD = 528.8 = 897 mm
KNm MDA = 452.3 KNm Ast = (889.8 x 106) / (200 x 0.902 x 362) Ast = 5498.74
mm2
2. Mid Span Moments :
4.2 Check for Shear :
MAB = 1036 – 528.8 = 507.2 KNm. Shear Force @ deff from face of wall Vu = (116.71 (3-
MDC = 654.32 – 452.3 = 202.2 KNm. 2(0.897 + 0.05)) / 2 Vu = 221/2
MAD = 492.1 – (528.8+452.3)/2 = 1.55 KNm. Vu = 110.5 KN
Shear stress = Vu / bd
3. Breaking Force:
= (110.5 x 103) / (1000 x 897)

= 0.123 N/mm2

Steel Percentage = (Ast x 100) / bd

= (5498.74 x 100) / (1000 x 897)
Steel % = 0.613 Permissible Shear Stress
= 0.123 + (((0.613 - 0.5)0.05) / 0.25)
= 0.145 N/mm2
Increase tension steel to increase permissible shear stress
Fig. 3 Breaking Force Required steel
= (((0.123 – 0.0434)0.25) / 0.05) + 0.5
= 0.39 %
3.1 70R Tracked Load:
Steel area = (0.9 x 1000 x 897) / 100
As per IRC - 6-2014, The breaking force shall be 20% for = 3498 mm2
the first lane road. The breaking force = 350x20/100 Hence, provide tension steel 3498 mm2 in place of 5498
mm2 required for moment only
=70KN.
Load on top of the box which will affect the box =
11.4x70/4.7 = 169.79 KN. 4.3 Bottom Slab :
Bending Moment (Max) = 813.3 KNm d = ((813.3 x 106) / (1000 x 1.105))
d = 857.9 mm
Provided 858 mm is OK
Ast = (813.3 x 106) / (200 x 0.902 x 858)
Ast = 5254.5 mm2

4.4 Check for Shear :

Shear Force = 72.45 (3-2(0.858 + 0.05)) / 2
= 42.89 KN
Shear Stress
= Vu / bd
= (42.89 x 103) / (1000 x 858)
= 0.049 N/mm2 < 0.2715 N/mm2

4.5 Side Walls :

Moment at junction is same as slabs hence same tensile bars shall continue.
RA= ((12 x 4.25) / 2) + (1/2) x 85 x 4.25 x (1/3)
= 25.5 + 60.21
= 85.71KN
RD = ((12 x 4.25) / 2) + 85 x 4.25 x 1/3
= 25.5 + 120.42
= 145.92 KN
S.F @ deff from
D = RD - (85 + 29.65) / 2 x 0.442 - 12 x 0.442
= 145.92 – 113.83
= 32.09 KN
Shear Stress
= (32.09 x 103) / (1000 x 750)
= 0.0428 N/mm2 < 0.10 N/mm2

Hence, Safe.
8.5 / 85 = 7.83 / x
x = 78.3
7.83 / 78.3 = 0.62 / x
x = 6.2

A = RA - 1/2 x 6.2 x 0.62 - 12 x 0.62

= 85.7 – 5.013
= 80.18 KN
Shear Stress
= (80.18 x 103) / (1000 x 700)
= 0.014 N/mm2 < 0.1 N/mm2 Hence, Safe.
GANAKALLU LAKE
 8MMØ @ 6" C/C
12MMØ @ 6" C/C TOP SLAB

0.45M

8MMØ @ 6" C/C

12MMØ @ 6" C/C

1.5M
1.5M

3.0M

SIDE WALL

8MMØ @ 6" C/C

12MMØ @ 6" C/C
0.1M 0.45M

C/S OF BOX CULVERT