Question

In vacuum method, the vacuum drawn on the well-point stiffened the sub-soil to carry out excavations.

(a) True

(b) False

I had been asked this question in class test.

Asked question is from Drainage and Dewatering topic in section Drainage and Dewatering of Geotechnical Engineering I

Answer 1

Right option is (a) True

The best I can explain: When the vacuum is drawn on the well-point, the ground surface is subjected to unbalanced atmospheric pressure consolidating the sub-soil which becomes stiff enough for carrying out excavations.