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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Ishita Das posted an Question
December 03, 2020 • 01:11 am
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30 points
30 points
- IIT JAM
- Geology (GG)
For the construction of a gravity dam choose the most favourable geological condition of the following
For the construction of a gravity dam choose the most favourable geological condition of the following (a) strata dipping downstream in narrow Valley (b)strata upstream in a wide Valley (C) strata dipping downstream in wide Valley (d) strata dipping upstream in narrow Valley
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Rahul kumar Best Answer
Answer: (b) Strata dipping upstream in a wide valley Gravity dams are best suited for wide/broad river valley (However it can also be built on narrow river valley with sound foundation rocks). The upstream dipping rocks will minimise the pore fluid pressure and hence will provide stability of the dam.
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Sajan sarthak![best-answer]()
Strata dipping upstream and wide valley region because:-- A gravity dam is a structure designed to withstand loads by its own weight and by its resistance to sliding and overturning on its foundation so a bigger structure means more weight so a wide valley is good one