The group pile will be developed without onsite static load tests. The soil conditions are consistent, and the site characterization program was Average. A single pile of that group with a circular shape is shown in the figure below. There are 4 rows of 3 piles with center-to-center spacing of 3 meters in the plan. First, calculate the allowable downward load capacity for a single pile and then find the group efficiency and calculate the allowable downward capacity. (use the table for finding skin friction)

The group pile will be developed without onsite static load tests. The soil conditions are consistent, and the site characterization program was Average. A single pile of that group with a circular shape is shown in the figure below. There are 4 rows of 3 piles with center-to-center spacing of 3 meters in the plan. First, calculate the allowable downward load capacity for a single pile and then find the group efficiency and calculate the allowable downward capacity. (use the table for finding skin friction)

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

The group pile will be developed without onsite static load tests. The soil conditions are
consistent, and the site characterization program was Average. A single pile of that group with a
circular shape is shown in the figure below. There are 4 rows of 3 piles with center-to-center
spacing of 3 meters in the plan. First, calculate the allowable downward load capacity for a single
pile and then find the group efficiency and calculate the allowable downward capacity. (use the
table for finding skin friction)
Silty Sand (SM)
kN
m³
Y = 17-
kN
Ysat 20-
Well Graded
Sand (SW)
kN
m³
Y = 20-
2.0
1.5
10.5
K
-0.6
Depth(m) N60
1
2.5
4
7
9
12
10
20
12
15
22
20
19
16 24
31

layer
No.
1
2
3
Depth
(m)
0-2
2-3.5
3.5-9
9-16
Z
(m)
B
0₂
(kPa)
fs
(kPa)
As
(m2)
Sum
fs As
(KN)

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