The soil profile at a site consists of 10 m of gravelly sandunderlain by a soft clay layer. The water table lies 1 m belowthe ground level. The moist and saturated unit weights of thegravelly sand are 17.0 kN/m3 and 20.0 kN/m3, respectively.Due to some ongoing construction work, it is proposed tolower the water table to 3 m below the ground level. Whatwill be the change in the effective stress on top of the softclay layer?

initial effective stress: σ'=1×γD+9×(γSATURATED-γWATER)γD=17 KN/m3γSATURATED=20 KN/m3γWATER=9.81…

Answered: The soil profile at a site consists of…

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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The soil profile at a site consists of 10 m of gravelly sand
underlain by a soft clay layer. The water table lies 1 m below
the ground level. The moist and saturated unit weights of the
gravelly sand are 17.0 kN/m³ and 20.0 kN/m³, respectively.
Due to some ongoing construction work, it is proposed to
lower the water table to 3 m below the ground level. What
will be the change in the effective stress on top of the soft
clay layer?

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