2024

SOIL INVESTIGATION WORK FOR PROPOSED BUILDING AT

PARK STREET ROAD, SURYA NAGAR, 1 NO DABGRAM,
P.O. - RABINDRA SARANI, P.S. - SILIGURI, DIST -
DARJEELING, WARD NO - 23 (S.M.C.), MOUZA - SILIGURI,
KHATIAN NO - 151 (RS), 6613, 6614, 6615, 6584, 6585
(L.R.), PLOT NO - 12420 (RS), 3427 & 3423 (L.R.), J.L. NO -
100 (88).

OWNER’S NAME : SRI NITISH PAUL & OTHERS.

EXECUTED BY-
NS TESTING HOUSE
.
SOIL INVESTIGATION & STRUCTURAL ANALYSIS
GROUND FLOOR, BABUA APARTMENT,
SAKTIGARH ROAD NO. 2, SILIGURI- 7340005
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NS TESTING HOUSE

BORE LOG DATA SHEET

Project : Soil Investigation Work for Proposed Building at Park Street Road, Surya Nagar, 1 No Dabgram, P.O. - Rabindra
Sarani, P.S. - Siliguri, Dist - Darjeeling, Ward No - 23 (S.M.C.), Mouza - Siliguri, Khatian No - 151 (RS), 6613, 6614, 6615, 6584,
6585 (l.r.), Plot No - 12420 (RS), 3427 & 3423 (L.R.), J.L. No - 100 (88).

Bore Hole No 1 Borehole Diameter 150 (mm)

Commenced on 13.07.24 Ground Elevation 0.00
Completed on 13.07.24 Termination Depth 7.95 (m)
Water Level 1.50m Method of Boring Shell & Auger

Sample Details

Thicknees (m)
Depth (m) SPT: No of Blows
N' Value

Description
Type

15-30 cm

30-45 cm
0-15 cm
From

To

D 0.50 Top soil with silt with sandy silty clay,

1.10 sand, kankars etc. (0.00 - 1.10)m.
D 1.00

P 1.50 1.95 3 4 5 9 Loose to medium greyish micaceous silty

2.80 fine sand.
P 3.00 3.45 7 6 8 14 (1.10 - 3.90)m.

P 4.50 4.95 9 9 11 20
Medium dense to dense whitish grey
P 6.00 6.45 12 13 13 26 3.60 micaceous silty fine to medium sand.
(3.90 - 7.50)m.
P 7.50 7.95 14 18 16 34

U-Undisturbed Sample D-Disturbed Sample P-Standard Penetration Test

 Page 15
NS TESTING HOUSE

BORE LOG DATA SHEET

Project : Soil Investigation Work for Proposed Building at Park Street Road, Surya Nagar, 1 No Dabgram, P.O. - Rabindra
Sarani, P.S. - Siliguri, Dist - Darjeeling, Ward No - 23 (S.M.C.), Mouza - Siliguri, Khatian No - 151 (RS), 6613, 6614, 6615, 6584,
6585 (l.r.), Plot No - 12420 (RS), 3427 & 3423 (L.R.), J.L. No - 100 (88).

Bore Hole No 2 Borehole Diameter 150 (mm)

Commenced on 13.07.24 Ground Elevation 0.00
Completed on 13.07.24 Termination Depth 7.95 (m)
Water Level 1.50m Method of Boring Shell & Auger

Sample Details

Thicknees (m)
Depth (m) SPT: No of Blows
N' Value

Description
Type

15-30 cm

30-45 cm
0-15 cm
From

To

D 0.50 Top soil with silt with sandy silty clay,

1.10 sand, kankars etc. (0.00 - 1.10)m.
D 1.00

P 1.50 1.95 3 3 4 7 Loose to medium greyish micaceous silty

2.90 fine sand.
P 3.00 3.45 6 7 7 14 (1.10 - 4.00)m.

P 4.50 4.95 8 11 10 21
Medium dense to dense whitish grey
P 6.00 6.45 11 13 12 25 3.50 micaceous silty fine to medium sand.
(4.00 - 7.50)m.
P 7.50 7.95 14 16 15 31

U-Undisturbed Sample D-Disturbed Sample P-Standard Penetration Test

 Page 18
NS TESTING HOUSE
Project : Soil Investigation Work for Proposed Building at Park Street Road, Surya Nagar, 1 No Dabgram, P.O. - Rabindra Sarani,
P.S. - Siliguri.

GRAIN SIZE DISTRIBUTION CURVES

100.0

80.0
Percentage finer

60.0

40.0

20.0

0.0
0.002

0.075

0.425

4.75
2
0.001 0.01 0.1 1 10

Grain size (mm)

BH-1, SPT (1.50m) BH-1, SPT (4.50m) BH-1, SPT (7.50m)

Grain size (mm) <0.002 0.002-0.075 0.075-4.75 >4.75

Clay Silt Sand Gravel
Sample No.
(%) (%) (%) (%)
BH-1, SPT (1.50m) 27.9 72.1 0.0
BH-1, SPT (4.50m) 18.5 81.5 0.0
BH-1, SPT (7.50m) 13.7 86.3 0.0

GRAIN SIZE DISTRIBUTION CURVES

100.0

80.0
Percentage finer

60.0

40.0

20.0

0.0
0.002

0.075

0.425

4.75
2

0.001 0.01 0.1 1 10

Grain size (mm)

BH-2, SPT (3.00m) BH-2, SPT (6.00m)

Grain size (mm) <0.002 0.002-0.075 0.075-4.75 >4.75

Clay Silt Sand Gravel
Sample No.
(%) (%) (%) (%)
BH-2, SPT (3.00m) 25.0 75.0 0.0
BH-2, SPT (6.00m) 15.6 84.4 0.0
* Silt & Clay
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LABORATORY TEST RESULTS NS TESTING HOUSE

Standard Penetration

Dry density( gm/c.c.)

Bulk Density (gm/cc)
Resistance ‘N’ value

Co-hesion (kg/cm )
Plasticity Index (%)

2
Natural Moisture

Angle of Friction

Pressure Range
Plastic Limit (%)

IS Classification
Liquid Limit(%)
Bore Hole No.

Type of Test
Content (%)

mv (cm /kg)
Gravel (%)

Sp.Gravity
Depth (m)

Sand (%)

Clay (%)

(degree)

(kg/cm )

2
2
Silt (%)
Type

P 1.50 9 - 72.10 27.90* 20.0 1.880 1.567 Non-Plastic SM DS 31.0 2.64

BH-1

P 4.50 20 - 81.50 18.50* 17.0 1.890 1.615 Non-Plastic SM 2.65

P 7.50 34 - 86.30 13.70* 15.0 1.900 1.652 Non-Plastic SM 2.67

* Silt & Clay

DS: Direct Shear Test

UC: Unconfined Compression Test
UU: Unconsolidation Undrained Test
Project : Soil Investigation Work for Proposed Building at Park Street Road, Surya Nagar, P.O. - Rabindra Sarani, P.S. - Siliguri.
 Page 17
LABORATORY TEST RESULTS NS TESTING HOUSE

Standard Penetration

Dry density( gm/c.c.)

Bulk Density (gm/cc)
Resistance ‘N’ value

Co-hesion (kg/cm )
Plasticity Index (%)

2
Natural Moisture

Angle of Friction

Pressure Range
Plastic Limit (%)

IS Classification
Liquid Limit(%)
Bore Hole No.

Type of Test
Content (%)

mv (cm /kg)
Gravel (%)

Sp.Gravity
Depth (m)

Sand (%)

Clay (%)

(degree)

(kg/cm )

2
2
Silt (%)
Type

P 3.00 14 - 75.00 25.00* 23.0 1.880 1.528 Non-Plastic SM 2.65

BH-2

P 6.00 31 - 84.40 15.60* 16.0 1.900 1.638 Non-Plastic SM DS 33.0 2.67

* Silt & Clay

DS: Direct Shear Test

UC: Unconfined Compression Test
UU: Unconsolidation Undrained Test
Project : Soil Investigation Work for Proposed Building at Park Street Road, Surya Nagar, P.O. - Rabindra Sarani, P.S. - Siliguri.
Project : Soil Investigation Work for Proposed Building at Park Street Road, Surya Nagar, 1 No Dabgram, P.O. - Rabindra
Sarani, P.S. - Siliguri.
Page 13
NS TESTING HOUSE
0 10 20 30 40
0

2 BH-1

BH-2

4
DEPTH(m)

10

N-VALUE

Figure 3 : Distribution of Field N-Value with Depth

Project : Soil Investigation Work for Proposed Building at Park Street Road, Surya Nagar, 1 No Dabgram, P.O. - Rabindra Sarani, P.S. - Siliguri.

Page 11
NS TESTING HOUSE

BH = 2

BH = 1

9.15 M WIDE S.M.C. ROAD

Figure1: Borehole Location Plane

Not to Scale
Project : Soil Investigation Work for Proposed Building at Park Street Road, Surya Nagar, 1 No Dabgram, P.O. - Rabindra Sarani, P.S. - Siliguri.

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NS TESTING HOUSE

BH-1 BH-2
0.00 0.00

Depth in meter, Below E.G.L.

(-)1.10m (-)1.0 (-)1.10m (-)1.0

(-)2.0 (-)2.0

(-)3.0 (-)3.0
(-)3.90m (-)4.00m
(-)4.0 (-)4.0

(-)5.0 (-)5.0

(-)6.0 (-)6.0

(-)7.0 (-)7.0
(-)7.95m (-)7.95m

LEGEND
Layer-I : Top soil with silt with sandy silty clay, sand, kankars etc.
Layer-II : Loose to medium greyish micaceous silty fine sand.
Layer-III : Medium dense to dense whitish grey micaceous silty fine to medium sand.

Figure 2: Generalized Soil Profile