A drilled shaft is constructed in a uniform clay layer of 40 ft. and tipped in a uniform,dense sand layer with N60 of 30. The drilled shaft has a diameter of 3 ft. and embeddedlength is 40 ft. Assume a total unit weight of 125 pcf for clay and 120 pcf for sand. Thewater table is at a depth of 15-ft. The unit weight of clay below water table is 125 pcf aswell. The clay layer has undrained shear strength of 2 ksf. Assume depth of zone ofseasonal moisture change to be 5-ft. Find the ultimate load capacity of the drilled shaft.Use alpha method for clay and beta method for sand.Clayy=Ysat=125 pcfc,=2 ksf15 ftWater table40 ftDense sand: N=30; Ysat=120 pcf

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A drilled shaft is constructed in a uniform clay layer of 40 ft. and tipped in a uniform, dense sand layer with N60 of 30. The drilled shaft has a diameter of 3 ft. and embedded length is 40 ft. Assume a total unit weight of 125 pcf for clay and 120 pcf for sand. The water table is at a depth of 15-ft. The unit weight of clay below water table is 125 pef as well. The clay layer has undrained shear strength of 2 ksf. Assume depth of zone of seasonal moisture change to be 5-ft. Find the ultimate load capacity of the drilled shaft. Use alpha method for clay and beta method for sand. Clay y= Ysat=125 pcf c,=2 ksf 15 ft Water table 40 ft Dense sand: N0=30; Ysat=120 pcf

A drilled shaft is constructed in a uniform clay layer of 40 ft. and tipped in a uniform, dense sand layer with N60 of 30. The drilled shaft has a diameter of 3 ft. and embedded length is 40 ft. Assume a total unit weight of 125 pcf for clay and 120 pcf for sand. The water table is at a depth of 15-ft. The unit weight of clay below water table is 125 pef as well. The clay layer has undrained shear strength of 2 ksf. Assume depth of zone of seasonal moisture change to be 5-ft. Find the ultimate load capacity of the drilled shaft. Use alpha method for clay and beta method for sand. Clay y= Ysat=125 pcf c,=2 ksf 15 ft Water table 40 ft Dense sand: N0=30; Ysat=120 pcf

Principles of Foundation Engineering (MindTap Course List)

8th Edition

ISBN:9781305081550

Author:Braja M. Das

Publisher:Braja M. Das

Chapter10: Drilled-shaft Foundations

Section: Chapter Questions

Problem 10.9P

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