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Engineering Department ENGR 370 - Surveying: Student Names

1) This document summarizes a student lab experiment on profile leveling for a surveying class. The lab involved taking elevation measurements along a 50 pace road section to determine cut and fill needs. 2) Students measured elevations at 10 pace intervals, calculated height of instrument and reduced levels, and determined 1.44 square meters of total fill area was needed based on the desired road grade. 3) The conclusions emphasized that the experiment taught how to perform profile leveling using an automatic level and how to use the elevation data to calculate earthwork quantities based on a design ground line.

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zhalyan sardar
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50 views9 pages

Engineering Department ENGR 370 - Surveying: Student Names

1) This document summarizes a student lab experiment on profile leveling for a surveying class. The lab involved taking elevation measurements along a 50 pace road section to determine cut and fill needs. 2) Students measured elevations at 10 pace intervals, calculated height of instrument and reduced levels, and determined 1.44 square meters of total fill area was needed based on the desired road grade. 3) The conclusions emphasized that the experiment taught how to perform profile leveling using an automatic level and how to use the elevation data to calculate earthwork quantities based on a design ground line.

Uploaded by

zhalyan sardar
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOCX, PDF, TXT or read online on Scribd
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Engineering Department

ENGR 370 – Surveying

Student Names:
1- Aland Ako

2- Nvar Kamal

3- Zhalyan Sardar

4- Karzok Nassradin

5- Soma Hoshyar

6- Daban Hawraman

Test Name: Profile Leveling


Test Date: 4/4/ 2021
Submission Date: 4/28/2021
Introduction:

Profile leveling is taking the longitudinal cross section of a road to


determine the elevation of points along the center line of a rail way, high
way, canal, sewer system, and etc. This method is used to determine the
areas that should be cut or filled along the project, and to design the
most suitable gradients to which the ground should be worked.

Objective:
In this experiment we will learn about profile leveling and how to
use the data to determine the amount of earthwork needed.

1
Material:

1- Automatic Level

2- Tripod

2
3- Level rod

Procedure:
We measured 50 paces, 10 at a time and marked their locations.
Then placed the benchmark outside of the field of work (in this instance
the road), and we measured its elevation to find the instrument height
(HI) later. Then we measured the elevation of each point.

3
Data sheet:

Details: Students:

1- Location: Suleiman, AUIS 1. Aland 6- Karzok


2- Test Date: 2/7/ 2021 2. Nvar
3- Weather: normal 3. Zhalyan

4- Temperature: 21 C 4. Daban
5. Soma

4
Station Distanc B.S. I.S. (m) F.S. HI (m) R.L.
1 e (m) (m) (m)
(paces)
B.M - 1.30 101.30 100
0 0 1.69 99.61
1 10 1.70 99.60
2 20 1.66 99.64
3 30 1.62 99.68
4 40 1.57 99.73
5 50 1.51 99.79

Calculations:
To find the data presented in the table:
Height of Instrument (H.I) = Bench mark elevation (B.M.) + Back Sight
(B.S.)
Reduced Level (R.L.) = Height of instrument (H.I) – F.S. or I.S.

5
To determine the areas of cutting and filling:

Profile Leveling
99.9

99.85
D
99.8 F

3
99.75
Elevetion (m)

99.7 C
2
E
99.65
A 1
99.6
B
99.55

99.5
0 10 20 30 40 50 60

Distance (paces)

The red line represents the desired ground level, and the blue line represents the
actual ground level.

Equation of the red line (RL):

y= 0.004x + 99.61

Area part 1:

RL at 10= 99.65

EB= 99.65-99.6= 0.05m

AE = 10(0.72) = 7.2m

AB= 10(0.72) = 7.2m

h=7.19m

6
A1= 0.5(7.19)(0.05)= 0.18m2

Area part 2:

EF = BC = 30

EB = FC = 0.05m

A2= (0.05)(30)(0.72)= 1.08m2

Area part 3:

CD= 10

FD= 10

FC = 0.05m

h= 7.19m

A2= 0.5(7.19)(0.05)= 0.18m2

Total area to be filled= part 1+ part 2 + part 3 = 1.44m2

7
Discussion and remarks
To find the area of part 1 and part 3, the height of the triangles was
found using Pythagoras theory, and the distance between the points were
found using the formula for distance between two points. Also, part 2 is
considered as a rectangle since the angle EBC is so close to 90 degree.
The line of the desired ground level helps us determine how much
earthwork is required, in our case it is filling.

Conclusion
In this experiment, we learned about profile leveling and how to
perform it using an automatic level. Also, we learned how to use its data
to determine the work that needs to be done in the site by using the line
of desired ground level.

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