Question

In Lane’s weighted creep theory, he suggested a weightage factor _________

(a) 1/3 for horizontal creep and 1.0 for vertical creep

(b) 1/3 for vertical creep and 1.0 for horizontal creep

(c) 2/3 for horizontal creep and 1/3 for horizontal creep

(d) 2/3 for vertical creep and 1/3 for horizontal creep

I got this question during an online exam.

I'm obligated to ask this question of Seepage Theories in chapter Seepage Theories and Weirs and Barrages Design of Irrigation Engineering

Answer 1

The correct option is (a) 1/3 for horizontal creep and 1.0 for vertical creep

Explanation: A weightage factor of 1/3 is proposed by Lane for horizontal creep and 1.0 for vertical creep. The weighted creep length –

L = (1/3) B + V where B = sum of horizontal contacts and sloping contacts less than 45° to the horizontal and V = sum of vertical contacts and sloping contacts greater than 45° to the horizontal.