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What are the two main causes of failure of hydraulic structure on the pervious foundation?

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+1 vote
in Irrigation Engineering by (75.2k points)
What are the two main causes of failure of hydraulic structure on the pervious foundation?

(a) Seepage and Over-turning

(b) Undermining and Uplift

(c) Over-turning and Piping

(d) Overturning and Uplift

I got this question in homework.

My query is from Seepage Theories topic in portion Seepage Theories and Weirs and Barrages Design of Irrigation Engineering

1 Answer

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by (106k points)
The correct option is (b) Undermining and Uplift

For explanation I would say: Whenever a hydraulic structure is founded on a pervious foundation, it is subjected to seepage of water beneath the structure in addition to all other forces. The water seeping below endangers the stability of the structure and may cause its failure either by Piping or Undermining and Direct uplift.

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