Question

_________ method of increasing the bearing power of soil becomes very useful when the load coming on the soil is practically uniform.

(a) Raft foundation

(b) Grillage foundation

(c) Mat foundation

(d) Inverted arch foundation

The question was posed to me at a job interview.

My question is from Components topic in division Important Building Components of Construction & Building Materials

Answer 1

Right answer is (a) Raft foundation

The explanation is: Raft foundations are very useful in the soil which is of yielding nature that is soft clay or reclaimed soil. The raft is designed as an inverted RCC roof with uniformly distributed load of the soil pressure and supported by walls, beams and columns.