Question

The resultant earth pressure at any point of a raft is considered to be ___________

(a) w + mw

(b) (1-m)w

(c) w-mw

(d) (1-w)m

I had been asked this question in a national level competition.

I want to ask this question from IS Code of Practice for Design of Raft Foundations topic in division Shallow Foundations of Geotechnical Engineering II

Answer 1

Correct choice is (a) w + mw

Explanation: The earth pressure varies from point to point of a raft, and hence the resultant pressure at any point is considered to be w + mw, where w is constant and m varies throughout the raft.