Check the total settlement of a group of pile as shown in Figure 1. The total allowable settlement isset not exceed 3% of the pile diameter and the overconsolidated ratio (OCR) of the clay is more than1. The groundwater table is located 15m beneath the ground level. The diameter of the pile, b is0.5m and the spacing between piles, s is 2m.The pile group is subjected to foundation load of5425KN. The laboratory testing data for the soil samples taken are as follows:At 5m, eo = 0.55, Cc = 0.32, C, = 0.09, ơ'o = 150KN/m?At 10m, eo = 0.55, Cc = 0.32, C; = 0.09, o'o = 225KN/m?At 12m, e, = 0.55, Cc = 0.32, C, = 0.09, oo = 300KN/m?7m5mClay10mUnit weight = 18kN/mFriction angle = 0degreeCohesion = 100KN/m

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Check the total settlement of a group of pile as shown in Figure 1. The t

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter12: Pile Foundations

Section: Chapter Questions

Problem 12.10P

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Concept explainers

Load and resistance factor design

Load and resistance factors design (LRFD), also known as Limit state design (LSD), refers to the design method used in building engineering. A boundary condition is a condition of a structure where it can no longer meet the relevant design requirements. The condition may refer to the load level or other actions on the structure, while the terms refer to the integrity of the structure, suitability for use, durability, or other design requirements. A structure designed for LRFD is limited to keeping track of all possible actions during its design time and is always ready for use, with the appropriate level of reliability in each boundary condition. LRFD-based construction codes clearly define the appropriate levels of reliability in their instructions.

Question

Check the total settlement of a group of pile as shown in Figure 1. The total allowable settlement is
set not exceed 3% of the pile diameter and the overconsolidated ratio (OCR) of the clay is more than
1. The groundwater table is located 15m beneath the ground level. The diameter of the pile, b is
0.5m and the spacing between piles, s is 2m.The pile group is subjected to foundation load of
5425KN. The laboratory testing data for the soil samples taken are as follows:
At 5m, eo = 0.55, Cc = 0.32, C, = 0.09, ơ'o = 150KN/m?
At 10m, eo = 0.55, Cc = 0.32, C; = 0.09, o'o = 225KN/m?
At 12m, e, = 0.55, Cc = 0.32, C, = 0.09, oo = 300KN/m?
7m
5m
Clay
10m
Unit weight = 18kN/m
Friction angle = 0
degree
Cohesion = 100KN/m

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