v. Nine-pile group consist of 0.30 m diameter friction concrete piles 12 m long arranged in 3 rows by 3 columns. The piles are driven into clay having unconfined compressive strength of 180 kPa and unit weight of clay is 18 kN/m³. The spacing of piles is 0.75 m oc. Assume a bearing capacity factor of Ne=9 and a=1.0. a. Find the allowable group pile capacity based on individual pile failure. b. Find the block capacity of pile group using a factor of safety of 3. c. Find the minimum pile spacing in order to achieve 100% efficiency.

v. Nine-pile group consist of 0.30 m diameter friction concrete piles 12 m long arranged in 3 rows by 3 columns. The piles are driven into clay having unconfined compressive strength of 180 kPa and unit weight of clay is 18 kN/m³. The spacing of piles is 0.75 m oc. Assume a bearing capacity factor of Ne=9 and a=1.0. a. Find the allowable group pile capacity based on individual pile failure. b. Find the block capacity of pile group using a factor of safety of 3. c. Find the minimum pile spacing in order to achieve 100% efficiency.

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 12.20P: A 600 mm diameter and 25 m long driven concrete pile carries a column load of 1200 kN. It is...

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