Question

A homogeneous gravity retaining wall supporting a cohesive backfill is shown in the figure. The lateral active earth pressure at the bottom of the wall is 40 kPa

The maximum weight of the wall (expressed in KN per m length required to prevent it from overturning about its toe (Point P) is

• A. 120
• B. 180
• C. 240
• D. 360

Answer 1

The correct option is A 120


Moment about toe

$F\times 2=W\times 2$

F = W

$W=F=\frac{1}{2}\times 6\times 40=120KN$

Weight of wall = 120 kN