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Enlarging the stem of bore hole at the depth is done by using________

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+1 vote
in Geotechnical Engineering II by (93.7k points)
Enlarging the stem of bore hole at the depth is done by using________

(a) Spiral auger

(b) Under-reamer

(c) Boring guide

(d) None of the mentioned

I got this question during an online exam.

Enquiry is from Construction of Under-Reamed Pile Foundation in portion Pile Foundations of Geotechnical Engineering II

1 Answer

0 votes
by (243k points)
Correct choice is (b) Under-reamer

Easy explanation: Under-reaming or enlarging the stem of bore hole at the required depths is achieved by means of the under-reamer consisting of a set of two collapsible blade assembly.

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