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
subject: Geotechnical Engineering
book: principle of foundation engineering - Braja M Das
Determine the effective stress at the top of the clay layer before lowering the water table using the relation
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