Question

The average drainage path for the pressure increment is calculated from the formula of ______

(a) \(d=\frac{1}{2} \left[\frac{H_{‘}-H_f}{2}\right] \)

(b) \(d=\frac{1}{2} \left[\frac{H_{‘}}{2}\right] \)

(c) \(d=\frac{1}{2} \left[\frac{H_{‘}-H_f}{4}\right] \)

(d) \(d=\frac{1}{2} \left[\frac{H_f-H_{‘}^{’}}{2}\right] \)

The question was asked in an internship interview.

I'd like to ask this question from Determination of Coefficient of Consolidation in section One Dimensional Consolidation of Geotechnical Engineering I

Answer 1

Right choice is (a) \(d=\frac{1}{2} \left[\frac{H_{‘}-H_f}{2}\right] \)

The best explanation: The average drainage path for the pressure increment is calculated from the formula of,

\(d=\frac{1}{2} \left[\frac{H_{‘}-H_f}{2}\right] \)

where, H1=initial height of the specimen under initial load

and Hf=final height of the specimen under final load.