Q4: It is required to construct a pile foundation comprised of 25 piles arranged in 5 columns at distances of 120 cm center to center. The diameter and lengths of the piles are 50 cm and 12 m respectively. The bottom of the pile cap is located at a depth of 3 m from the ground surface. The details of the soil properties etc. are as given below with reference to ground level as the datum. The water table was found at a depth of 6 m from ground level. Compute the consolidation settlement of the pile foundation if the total load imposed on the foundation is 3000 KN * 25 degrees Depth Soil properties Silt, saturated, y= 15.8 kN/m³ Clay, saturated, y = 18.80 kN/m³ Clay, saturated, y = 19.6 kN/m³, qu = 125 kN/m², eo= 0.75, C 0.27 Clay, y = 18.30 kN/m³, qu = 100 kN/m², eo = 0.97, Ce=0.41 Clay, y = 19.85 kN/m³, qm = 165 kN/m², eo = 0.68, Ce-0.24 Rocky stratum From 0 3 5 10 14 18 To 3 5 10 14 18

Q4: It is required to construct a pile foundation comprised of 25 piles arranged in 5 columns at distances of 120 cm center to center. The diameter and lengths of the piles are 50 cm and 12 m respectively. The bottom of the pile cap is located at a depth of 3 m from the ground surface. The details of the soil properties etc. are as given below with reference to ground level as the datum. The water table was found at a depth of 6 m from ground level. Compute the consolidation settlement of the pile foundation if the total load imposed on the foundation is 3000 KN * 25 degrees Depth Soil properties Silt, saturated, y= 15.8 kN/m³ Clay, saturated, y = 18.80 kN/m³ Clay, saturated, y = 19.6 kN/m³, qu = 125 kN/m², eo= 0.75, C 0.27 Clay, y = 18.30 kN/m³, qu = 100 kN/m², eo = 0.97, Ce=0.41 Clay, y = 19.85 kN/m³, qm = 165 kN/m², eo = 0.68, Ce-0.24 Rocky stratum From 0 3 5 10 14 18 To 3 5 10 14 18

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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Concept explainers

Braced cuts

The braced cut is a method of providing lateral support to the soil in foundation trenches, to prevent the trenches from deformation by the caving in of soil and resisting it from moving laterally. During shallow excavation in firm soil, generally, slopes are provided to resist the caving in of soil. During shallow excavation in soft soil and deep excavation, the chances of caving in of soil increase. Hence, it becomes necessary to make a provision to resist the deformation of trenches due to caving in of soil. The braced cut is the method used for such conditions. The excavation using braced cuts is a bit uneconomical as compared to the traditional open-cut excavation method but provides better safety than the cut excavation method.

Question

Q4: It is required to construct a pile
foundation comprised of 25 piles
arranged in 5 columns at distances of 120
cm center to center. The diameter and
lengths of the piles are 50 cm and 12 m
respectively. The bottom of the pile cap is
located at a depth of 3 m from the
ground surface. The details of the soil
properties etc. are as given below with
reference to ground level as the datum.
The water table was found at a depth of 6
m from ground level. Compute the
consolidation settlement of the pile
foundation if the total load imposed on
*
the foundation is 3000 KN
25 degrees
Depth
Soil properties
From
0
Silt, saturated, y= 15.8 kN/m³
3
Clay, saturated, y = 18.80 kN/m³
5
Clay, saturated, y = 19.6 kN/m³, qu 125 kN/m², eo 0.75, C 0.27
10
Clay, y = 18.30 kN/m³, qu = 100 kN/m², eo = 0.97, Ce=0.41
14
Clay, y 19.85 kN/m³, g 165 kN/m², eo -0.68, Ce-0.24
Rocky stratum
18
To
3
5
10
14
18

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