GATE CE 2020 Geotech. Engg. Quiz 10 (App update required to attempt this test)

If  represents the total vertical stress total horizontal stress, effective vertical stress and effective horizontal stress on a soil element respectively, then the coefficient of passive earth pressure is given by

A vertical wall 7m high retaining a horizontal sand backfill. Unit weight and poison ration are

and . The total thrust at rest on vertical wall is _______ kN/m?

Consider the following statement about Coulomb earth pressure theory:

1) It is valid for gravity type retaining wall.

2) Coulomb considered wedge failure and failure surface passes through the toe of the wall.

3) Wedge acts as a rigid body.

4) This theory is not suitable for passive earth pressure.

5) Coulomb considered elemental failure.

Which of these is/are correct?

Two soil profile are used as backfill behind a retaining wall as shown in the figure, where is total unit weight and c’ & are effective shear parameters. Find the resultant active thrust acting on the wall in kN/m

An unbraced cut is made to the maximum possible depth in a pure clayey soil having unit weight and cohesion . The active earth pressure at the base level of cut is ________