A 500mm x 500mm precast concrete driven pile, 15 m long, is proposed to support a column load in a large multi-storey apartment building. The water table is located at a depth of 10m below the ground surface. The soil propertiesare given in Table below.Depth (m)c (kPa)$ (9)y (kN/m³) E (MPa)V0-12Soil TypeMedium dense SANDStiff CLAY0302050.312+100019100.3Using the applicable method (a or 3 method)a) Calculate the end bearing capacityb) Calculate the skin resistancec) Estimate the net allowable pile capacity (FS=2)d) Based on your calculations state whether this pile is a 'friction pile' or an 'end bearing pile'.

Given, B=500 mm L=15 m Nc*=9 cu=100

A 500mm x 500mm precast concrete driven pile, 15 m long, is proposed to support a column load in a large multi- storey apartment building. The water table is located at a depth of 10m below the ground surface. The soil properties are given in Table below. Depth (m) Soil Type () 7 (kN/m³) E (MPa) V c (kPa) 0 0-12 30 20 5 0.3 Medium dense SAND Stiff CLAY 12+ 100 0 19 10 0.3 Using the applicable method (a or 3 method) a) Calculate the end bearing capacity b) Calculate the skin resistance c) Estimate the net allowable pile capacity (FS=2) d) Based on your calculations state whether this pile is a 'friction pile' or an 'end bearing pile'.

A 500mm x 500mm precast concrete driven pile, 15 m long, is proposed to support a column load in a large multi- storey apartment building. The water table is located at a depth of 10m below the ground surface. The soil properties are given in Table below. Depth (m) Soil Type () 7 (kN/m³) E (MPa) V c (kPa) 0 0-12 30 20 5 0.3 Medium dense SAND Stiff CLAY 12+ 100 0 19 10 0.3 Using the applicable method (a or 3 method) a) Calculate the end bearing capacity b) Calculate the skin resistance c) Estimate the net allowable pile capacity (FS=2) d) Based on your calculations state whether this pile is a 'friction pile' or an 'end bearing pile'.

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter7: Seepage

Section: Chapter Questions

Problem 7.2P

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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

A 500mm x 500mm precast concrete driven pile, 15 m long, is proposed to support a column load in a large multi-
storey apartment building. The water table is located at a depth of 10m below the ground surface. The soil properties
are given in Table below.
Depth (m)
c (kPa)
$ (9)
y (kN/m³) E (MPa)
V
0-12
Soil Type
Medium dense SAND
Stiff CLAY
0
30
20
5
0.3
12+
100
0
19
10
0.3
Using the applicable method (a or 3 method)
a) Calculate the end bearing capacity
b) Calculate the skin resistance
c) Estimate the net allowable pile capacity (FS=2)
d) Based on your calculations state whether this pile is a 'friction pile' or an 'end bearing pile'.

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