+1 vote
in Irrigation Engineering by (75.2k points)
What is the value of eccentricity for no tension condition in the dam?

(a) e < B/6

(b) e > B/6

(c) e > B/3

(d) e < B/3

I had been asked this question in final exam.

The doubt is from Gravity Method in chapter Gravity Dam Design and Construction of Irrigation Engineering

1 Answer

0 votes
by (106k points)
Correct choice is (a) e < B/6

Easiest explanation: The resultant of all the forces i.e hydrostatic water pressure, uplift pressure and self-weight of the dam should always lie within the middle third of the base for no tension. When e < B/6, the value of stress intensity at toe and heel are positive i.e compression on both sides.

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