A square group of 25 piles extends between depth of 2m and 12m in adeposit of 20 m thick stiff clay overlying rock. The piles are 0.5 m india and are spaced at 1m centre to centre in the group. The undrainedshear strength of the clay at the pile base level is 180 kPa and theaverage value of the undrained shear strength over the depth of the pileis 110 kPa. The adhesion coefficient α is 0.45. Estimate the capacity ofthe pile group considering an overall factor of safety equal to 3 againstshear failure. Nc corresponding to φu = 0 is 9.
A square group of 25 piles extends between depth of 2m and 12m in adeposit of 20 m thick stiff clay overlying rock. The piles are 0.5 m india and are spaced at 1m centre to centre in the group. The undrainedshear strength of the clay at the pile base level is 180 kPa and theaverage value of the undrained shear strength over the depth of the pileis 110 kPa. The adhesion coefficient α is 0.45. Estimate the capacity ofthe pile group considering an overall factor of safety equal to 3 againstshear failure. Nc corresponding to φu = 0 is 9.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A square group of 25 piles extends between depth of 2m and 12m in a
deposit of 20 m thick stiff clay overlying rock. The piles are 0.5 m in
dia and are spaced at 1m centre to centre in the group. The undrained
shear strength of the clay at the pile base level is 180 kPa and the
average value of the undrained shear strength over the depth of the pile
is 110 kPa. The adhesion coefficient α is 0.45. Estimate the capacity of
the pile group considering an overall factor of safety equal to 3 against
shear failure. Nc corresponding to φu = 0 is 9.
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