11.24 Redo Problem 11.23 with the following: center-to-center spacing of piles = 762 mm, length of piles = 13.7 m, D = 305 mm, c̟ = 41.2 kN/m², ys = 19.24 kN/m², and FS = 3.

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Chapter2: Loads On Structures
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Please answer 11.24

11.24 Redo Problem 11.23 with the following: center-to-center spacing of piles = 762 mm,
length of piles = 13.7 m, D = 305 mm, c, = 41.2 kN/m², y = 19.24 kN/m²,
and FS = 3.
11.23 The plan of a group pile is shown in Figure P11.23. Assume that the piles are
embedded in a saturated homogeneous clay having a c, = 86 kN/m². Given:
diameter of piles (D) = 316 mm, center-to-center spacing of piles = 600 mm,
and length of piles = 20 m. Find the allowable load-carrying capacity of the pile
group. Use FS = 3.
%3D
Transcribed Image Text:11.24 Redo Problem 11.23 with the following: center-to-center spacing of piles = 762 mm, length of piles = 13.7 m, D = 305 mm, c, = 41.2 kN/m², y = 19.24 kN/m², and FS = 3. 11.23 The plan of a group pile is shown in Figure P11.23. Assume that the piles are embedded in a saturated homogeneous clay having a c, = 86 kN/m². Given: diameter of piles (D) = 316 mm, center-to-center spacing of piles = 600 mm, and length of piles = 20 m. Find the allowable load-carrying capacity of the pile group. Use FS = 3. %3D
Table 11.10 Variation of a (interpo-
lated values based on Terzaghi, Peck
and Mesri, 1996)
P.
s0.1
0.2
0.3
1.00
0.92
0.4
0.6
0.8
1.0
1.2
0.82
0.74
0.62
0.54
0.48
0.42
1.4
1.6
0,40
0.38
0.36
0.35
1.8
2.0
2.4
2.8
0.34
0.34
Note: P, = atmospheric pressure
- 100 kN/m²
ΣΟ,-L,Β,CpN + Σ 2(L, + B )c, ΔL
(11.121)
Step 3. Compare the values obtained from Eqs. (11.120) and (11.121). The lower of
the two values is Qgw)•
4B, = 1
8
5
4+
2
LIB
Transcribed Image Text:Table 11.10 Variation of a (interpo- lated values based on Terzaghi, Peck and Mesri, 1996) P. s0.1 0.2 0.3 1.00 0.92 0.4 0.6 0.8 1.0 1.2 0.82 0.74 0.62 0.54 0.48 0.42 1.4 1.6 0,40 0.38 0.36 0.35 1.8 2.0 2.4 2.8 0.34 0.34 Note: P, = atmospheric pressure - 100 kN/m² ΣΟ,-L,Β,CpN + Σ 2(L, + B )c, ΔL (11.121) Step 3. Compare the values obtained from Eqs. (11.120) and (11.121). The lower of the two values is Qgw)• 4B, = 1 8 5 4+ 2 LIB
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