There is no strict rule in governing the measure of rock encountered in piling operation. There are two common practices in measuring rock during piling:
(i) Measure the quantity of obstruction taken out from the drilled out;
(ii) Firstly, it is assumed that the rock surface is uniform. Based on this assumption, measure the obstruction level by using a tape.
Advertisements
This question is taken from book named – A Self Learning Manual – Mastering Different Fields of Civil Engineering Works (VC-Q-A-Method) by Vincent T. H. CHU.
If you have a query, you can ask a question here.