A masonry gravity retaining wall 5 m high has a cross section as shown by Figure 25 and supports a clay soil backfill that is level with the top of the wall. The top of the wall is 0.75 m wide and the...

A masonry gravity retaining wall 5 m high has a cross section as shown by Figure 25 and supports a clay soil backfill that is level with the top of the wall. The top of the wall is 0.75 m wide and the base of the wall is 1.75 m wide. Check the stability of this wall against overturning and sliding using criteria indicated by Figure 18(b). Use a unit weight for the masonry equal to 22 . Use Terzaghi charts and Figure 29 to obtain values for P_h
and P_v. Assume that the unit resistance to sliding along the base is equal to the value for the clay cohesion, determined from shear strength testing as 35 kPa.