Tuesday, 31 May 2016

Depth of exploration


The depth of the exploration required at a particular site depend on the degree of variation of the sub-surface data in the horizontal and vertical directions. It is not possible to fix the number, disposition and depth of borings without making a few preliminary borings or sounding at the site.

Generally exploration should be carried out to a depth upto which the increase in pressure due to structural loading is likely to cause perceptible settlement or shear failure. such a depth known as the significant depth, depent upon the type of the structure, its weight.  It is generally safe to assume the significant depth upto a level at which the net increase in vertical pressure become less than 10% of the initial overburden pressure.

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