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The document describes pile design calculations for two boreholes including pile dimensions, soil properties, and calculated pile capacities at various depths.

The pile design methodology involves calculating the safe bearing capacity (Qsu) based on the soil type and N-value, bond resistance (Qbu) based on the pile dimensions and soil properties, and net safe load (Fall1 and Fall2) accounting for these factors and the structural capacity.

The parameters considered in calculating the pile capacity are the soil type, N-value from SPT tests, pile dimensions like diameter/base area, bond resistance factors related to soil type, and structural capacity of the pile.

Project :

Client :
Location :
Subject :
Bore Hole No:- BH-1
Pile size
Base Area , Ab
Perimater
Recommended Structural Capacity
Qsu = As.Nave / 5 ( for sand(1) )

=
=
=
=

400
0.16
1600
170

mm
m2
mm
tonnes

Fall1 = Qsu / 2.5 + Qbu / 2.5


Fall2 = Qsu / 2 + Qbu / 2 - Qnsf

Qsu = As.Nave / 6 ( for silt / clay(2) )


Qbu = Ab.40*Nb
Qbu = Ab.30*Nb

( for sand(1) )

(max=1076ton/m2 or 10.7 MPa,

172.16 tonnes)

( for silt / clay(2) )

(max=1076ton/m2 or 10.7 MPa,

172.16 tonnes)

Depth
(m)
0
1.5
3
4.5
6
7.5
9
10.5
12
13.5
15
16.5
18
19.5
21
22.5
24
25.5
27

Thick
(m)
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5

SPT
N Value
0
16
18
11
15
16
20
19
22
21
24
17
20
18
21
21
23
25
31

Nave
0
8
17
14.5
13
15.5
18
19.5
20.5
21.5
22.5
20.5
18.5
19
19.5
21
22
24
28

Type of
soil
1
1
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2

Shaft area

As (m2)
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4

Qsu

Qsu (cum)

Qbu

Qnsf

(tonnes)

(tonnes)

(tonnes)

(tonnes)

0.00
3.84
6.80
5.80
5.20
6.20
7.20
7.80
8.20
8.60
9.00
8.20
7.40
7.60
7.80
8.40
8.80
9.60
11.20

0.00
3.84
10.64
16.44
21.64
27.84
35.04
42.84
51.04
59.64
68.64
76.84
84.24
91.84
99.64
108.04
116.84
126.44
137.64

0.00
72.53
72.00
70.40
67.20
81.60
88.00
97.60
99.20
107.20
99.20
97.60
88.00
94.40
96.00
104.00
110.40
126.40
142.40

0.875
0.875
0.875
0.875
0.875
0.875
0.875
0.875
0.875
0.875
0.875
0.875
0.875
0.875
0.875
0.875
0.875
0.875

Fall1

Fall2

(tonnes)

(tonnes)

0.00
30.55
33.06
34.74
35.54
43.78
49.22
56.18
60.10
66.74
67.14
69.78
68.90
74.50
78.26
84.82
90.90
101.14
112.02

0.00
37.31
40.45
42.55
43.55
53.85
60.65
69.35
74.25
82.55
83.05
86.35
85.25
92.25
96.95
105.15
112.75
125.55
139.15

28.5
30
31.5
33
34.5
36
37.5
39
40.5
42
43.5
45
46.5
48
49.5
51
52.5
54
55.5

1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5

33
35
26
30
32
36
38
50
50
50
50
50
50
50
50
50
50
50
50

32
34
30.5
28
31
34
37
44
50
50
25
50
50
50
50
50
50
50
50

2
2
2
2
2
2
2
2
2
2
2
2
1
1
1
1
1
1
1

2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4

12.80
13.60
12.20
11.20
12.40
13.60
14.80
17.60
20.00
20.00
10.00
20.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00

150.44
164.04
176.24
187.44
199.84
213.44
228.24
245.84
265.84
285.84
295.84
315.84
339.84
363.84
387.84
411.84
435.84
459.84
483.84

158.40
150.40
145.60
140.80
156.80
169.60
172.16
172.16
172.16
160.00
160.00
172.16
172.16
172.16
172.16
172.16
172.16
172.16
172.16

1.875
2.875
3.875
4.875
5.875
6.875
7.875
8.875
9.875
10.875
28.875
29.875
30.875
31.875
32.875
33.875
34.875
35.875
36.875

123.54
125.78
128.74
131.30
142.66
153.22
160.16
167.20
175.20
178.34
182.34
195.20
204.80
214.40
224.00
233.60
243.20
252.80
262.40

152.55
154.35
157.05
159.25
172.45
184.65
192.33
200.13
209.13
212.05
199.05
214.13
225.13
236.13
247.13
258.13
269.13
280.13
291.13

y
depth
0
-1.5
-3
-4.5
-6
-7.5
-9
-10.5
-12
-13.5
-15
-16.5
-18
-19.5
-21
-22.5
-24
-25.5
-27

Pile Depth vs Pile Capacity

50

100

0
-5

Pile Depth (m)

x
capacity
0.00
30.55
33.06
34.74
35.54
43.78
49.22
56.18
60.10
66.74
67.14
69.78
68.90
74.50
78.26
84.82
90.90
101.14
112.02

-10
-15
-20
-25
-30
-35
-40

Allowable Pile Capacity (tonnes)


BH-3 150MM RC PILE

150

123.54
125.78
128.74
131.30
142.66
153.22
160.16
167.20
175.20
178.34
182.34
195.20
204.80
214.40
224.00
233.60
243.20
252.80
262.40

-28.5
-30
-31.5
-33
-34.5
-36
-37.5
-39
-40.5
-42
-69
-70.5
-72
-73.5
-75
-76.5
-78
-79.5
-81

84% of recommended structural working load

90% of recommended structural working load

Project :
Client :
Location :
Subject :
Bore Hole No:- BH-1
Pile size
Base Area , Ab
Perimater
Recommended Structural Capacity
Qsu = As.Nave / 5 ( for sand(1) )

=
=
=
=

450
0.2025
1800
200

mm
m2
mm
tonnes

Fall1 = Qsu / 2.5 + Qbu / 2.5


Fall2 = Qsu / 2 + Qbu / 2 - Qnsf

Qsu = As.Nave / 6 ( for silt / clay(2) )


Qbu = Ab.40*Nb

( for sand(1) )

(max=1076ton/m2 or 10.7 MPa,

217.89 tonnes)

Qbu = Ab.30*Nb

( for silt / clay(2) )

(max=1076ton/m2 or 10.7 MPa,

217.89 tonnes)

Depth
(m)
0
1.5
3
4.5
6
7.5
9
10.5
12
13.5
15
16.5
18
19.5
21
22.5
24
25.5
27

Thick
(m)
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5

SPT
N Value
0
16
18
11
15
16
20
19
22
21
24
17
20
18
21
21
23
25
31

Nave
0
8
17
14.5
13
15.5
18
19.5
20.5
21.5
22.5
20.5
18.5
19
19.5
21
22
24
28

Type of
soil
1
1
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2

Shaft area

As (m2)
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7

Qsu

Qsu (cum)

Qbu

Qnsf

(tonnes)

(tonnes)

(tonnes)

(tonnes)

0.00
4.32
7.65
6.53
5.85
6.98
8.10
8.78
9.23
9.68
10.13
9.23
8.33
8.55
8.78
9.45
9.90
10.80
12.60

0.00
4.32
11.97
18.50
24.35
31.32
39.42
48.20
57.42
67.10
77.22
86.45
94.77
103.32
112.10
121.55
131.45
142.25
154.85

0.00
91.80
91.13
89.10
85.05
103.28
111.38
123.53
125.55
135.68
125.55
123.53
111.38
119.48
121.50
131.63
139.73
159.98
180.23

1.166
1.166
1.166
1.166
1.166
1.166
1.166
1.166
1.166
1.166
1.166
1.166
1.166
1.166
1.166
1.166
1.166
2.166

Fall1

Fall2

(tonnes)

(tonnes)

0.00
38.45
41.24
43.04
43.76
53.84
60.32
68.69
73.19
81.11
81.11
83.99
82.46
89.12
93.44
101.27
108.47
120.89
134.03

0.00
46.89
50.38
52.63
53.53
66.13
74.23
84.69
90.32
100.22
100.22
103.82
101.91
110.23
115.63
125.42
134.42
149.94
165.37

28.5
30
31.5
33
34.5
36
37.5
39
40.5
42
43.5
45
46.5
48
49.5
51
52.5
54
55.5

1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5

33
35
26
30
32
36
38
50
50
50
50
50
50
50
50
50
50
50
50

32
34
30.5
28
31
34
37
44
50
50
25
50
50
50
50
50
50
50
50

2
2
2
2
2
2
2
2
2
2
2
2
1
1
1
1
1
1
1

2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7

14.40
15.30
13.73
12.60
13.95
15.30
16.65
19.80
22.50
22.50
11.25
22.50
27.00
27.00
27.00
27.00
27.00
27.00
27.00

169.25
184.55
198.27
210.87
224.82
240.12
256.77
276.57
299.07
321.57
344.07
366.57
393.57
420.57
447.57
474.57
501.57
528.57
555.57

200.48
190.35
184.28
178.20
198.45
214.65
217.89
217.89
217.89
202.50
202.50
217.89
217.89
217.89
217.89
217.89
217.89
217.89
217.89

3.166
4.166
5.166
6.166
7.166
8.166
9.166
10.166
11.166
12.166
30.166
31.166
32.166
33.166
34.166
35.166
36.166
37.166
38.166

147.89
149.96
153.02
155.63
169.31
181.91
189.86
197.78
206.78
209.63
218.63
233.78
244.58
255.38
266.18
276.98
287.78
298.58
309.38

181.69
183.28
186.11
188.37
204.47
219.22
228.16
237.06
247.31
249.87
243.12
261.06
273.56
286.06
298.56
311.06
323.56
336.06
348.56

y
depth
0
-1.5
-3
-4.5
-6
-7.5
-9
-10.5
-12
-13.5
-15
-16.5
-18
-19.5
-21
-22.5
-24
-25.5
-27

Pile Depth vs Pile Capacity

50

100

150

0
-5

Pile Depth (m)

x
capacity
0.00
38.45
41.24
43.04
43.76
53.84
60.32
68.69
73.19
81.11
81.11
83.99
82.46
89.12
93.44
101.27
108.47
120.89
134.03

-10
-15
-20
-25
-30
-35
-40

Allowable Pile Capacity (tonnes)


BH-3 200MM RC PILE

200

147.89
149.96
153.02
155.63
169.31
181.91
189.86
197.78
206.78
209.63
218.63
233.78
244.58
255.38
266.18
276.98
287.78
298.58
309.38

-28.5
-30
-31.5
-33
-34.5
-36
-37.5
-39
-40.5
-42
-69
-70.5
-72
-73.5
-75
-76.5
-78
-79.5
-81

83% of recommended structural working load

90% of recommended structural working load

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