Determine the diameter of 70 ft long pile driven in the medium dense sand (Shown in Figure). Design load is 185Kips and factor of safety can be assumed to be 2.5. Frictional coefficient is 0.45 Sand y = 115lb/ft3 Ø = 28° 30 K = 0.80 70 Sand Ysat = 128lb/ft3 0= 30° K = 0.85 %3D 33°C ao

Determine the diameter of 70 ft long pile driven in the medium dense sand (Shown in Figure). Design load is 185Kips and factor of safety can be assumed to be 2.5. Frictional coefficient is 0.45 Sand y = 115lb/ft3 Ø = 28° 30 K = 0.80 70 Sand Ysat = 128lb/ft3 0= 30° K = 0.85 %3D 33°C ao

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

Determine the diameter of 70 ft long pile driven in the medium dense
sand (Shown in Figure). Design load is 185Kips and factor of safety can
be assumed to be 2.5. Frictional coefficient is 0.45
Sand
y = 115lb/ft3
Ø = 28°
K = 0.80
30
%3D
Sand
128lb/ft
%3!
Ysat
Ø= 30°
K = 0.85
33°C
70

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Calculate the pile's allowable bearing load using the corrected SPT values at various depths given in the figure below (factor of safety is 1.5). 10m D=1m 2m 2m 2m 2m 2m SPT1=14. SPT2=16 SPT3=18. SPT4=18 -- SPT5=20. Corrected SPT Values
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