Question

Composite piles are suitable for ______________

(a) Maximum design load

(b) Project above the water table

(c) Compacting the soil

(d) Protect water front structures

This question was posed to me during an interview.

The origin of the question is Types of Piles in chapter Pile Foundations of Geotechnical Engineering II

Answer 1

Right choice is (b) Project above the water table

To explain: Composite piles are suitable where the upper part of a file is to project above the water table. Such a pile consists of a lower portion of untreated timber and the upper portion of concrete.