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What is the recommended value of shear friction factor against sliding?

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+1 vote
in Irrigation Engineering by (75.2k points)
What is the recommended value of shear friction factor against sliding?

(a) More than unity

(b) Less than unity

(c) More than 3 to 5

(d) Less than 3

This question was addressed to me by my college professor while I was bunking the class.

Asked question is from Design of Gravity Dams in portion Gravity Dam Design and Construction of Irrigation Engineering

1 Answer

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by (106k points)
The correct choice is (c) More than 3 to 5

The best I can explain: Shear Friction Factor is given by –

SFF = sliding factor (SF) + B.q / ∑Ph where B = width of joint or section area = B x 1, q is the shear strength of the joint, and Ph is the sum of horizontal force causing sliding. SF must be greater than 1 and SFF must be greater than 3 to 5. This analysis is carried out for a full reservoir case as well as an empty case.

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