Question

The uncased cast-in-situ piles can be used only in the condition, where _______

(a) Water should not fall in the hole and Adjacent pile will not damage the concrete

(b) Seasonal condition change

(c) None of the mentioned

(d) All of the mentioned

This question was addressed to me in my homework.

The above asked question is from Uncased Cast-in-Situ Concrete Piles in chapter Pile Foundations of Geotechnical Engineering II

Answer 1

Right option is (a) Water should not fall in the hole and Adjacent pile will not damage the concrete

Explanation: The uncased piles are used only where it is certain that neither soil nor water will fall in to the hole after withdrawing a driven mandrel or shell and also where adjacent pile will not damage the green concrete.