Please find the question 1 is 2nd Image Find the allowable downward capacity of the pile used in question 1. Assume the factor of safetyis 3 and the pile is to be driven with the use of jetting. Use the ß method (the effective stress-based method). Divide the soil into 3 sub-layers.(3 A 50 cm square prestressed concrete pile will be driven 20 m into the soil profile below. (waterlevel at the ground surface). Compute the net load toe-bearing capacity.4.0016.00-0.5Y = 17.5 kN/m³Ø' = 28°Y = 18.5 kN/m³EsØ' = 32°=60000 kPaV = 0.35Dr = 50%

A square pile = 0.5 mLength of pile = 20 m Factor of safety = 3 Driven pile

A 50 cm square prestressed concrete pile will be driven 20 m into the soil profile below. (water level at the ground surface). Compute the net load toe-bearing capacity. 4.00 16.00 -0.5 y = 17.5 kN/m³ Ø' = 28° y = 18.5 kN/m³ Ø' = 32° Es 60000 kPa V=0.35 Dy = 50%

A 50 cm square prestressed concrete pile will be driven 20 m into the soil profile below. (water level at the ground surface). Compute the net load toe-bearing capacity. 4.00 16.00 -0.5 y = 17.5 kN/m³ Ø' = 28° y = 18.5 kN/m³ Ø' = 32° Es 60000 kPa V=0.35 Dy = 50%

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 12.37P

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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

Please find the question 1 is 2nd Image

Transcribed Image Text:A 50 cm square prestressed concrete pile will be driven 20 m into the soil profile below. (water level at the ground surface). Compute the net load toe-bearing capacity. 4.00 16.00 -0.5 Y = 17.5 kN/m³ Ø' = 28° Y = 18.5 kN/m³ Es Ø' = 32° = 60000 kPa V = 0.35 Dr = 50%

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