GATE CE 2019 Set 1 — Question 63
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Geotechnical Engineering → Stability of Slopes → Infinite Slopes
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Question
A granular soil has a saturated unit weight of and an effective angle of shearing resistance of . The unit weight of water is . A slope is to be made on this soil deposit in which the seepage occurs parallel to the slope up to the free surface. Under this seepage condition for a factor of safety of , the safe slope angle (in degree, round off to 1 decimal place) would be ________
Correct answer
10.8 to 11.3
Solution
For an infinite slope with seepage parallel to the slope up to the free surface, the factor of safety () is given by:Where:
- is the slope angle
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