UPSC Civil Service Exam Questions

Q1: A retaining wall 8 m high with a smooth vertical back retains a clay back fill with C' = 15 kN/m2, φ = 15° and γ = 18 kN/ m3. (Given sin 15° ≅ 0.25). The pressure at the top will, nearly, be equal to

A 35.2 kN/m2

B 23.0 kN/m2

C 27.6 kN/m2

D 11.5 kN/m2

ANS:D - 11.5 kN/m2

Ans should be B.

At top z=0 pa=-2crootka=-2*15*√0.6=23.2kn/sq.m.



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