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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Rahul kumar
Concrete dam: Concrete dam, also known as gravity dam is constructed in area with very stable rock foundations. The stability of gravity dam mainly depends on the weight of dam. Buttress dam: Buttress dam is made in area with relatively weaker foundation rocks. Load distribution is generally over a wide area. Solid concrete buttresses are made along downstream side of the dam to provide extra strength to the dam. In upper figure, the diagram is depicting the distribution of water pressure in case of dam with batter on upstream side. As shown in diagram, the water pressure is increasing with depth because of increasing thickness of water column. In lower figure the water pressure from below (uplift pressure) of the dam is shown. Uplift pressure decreases towards the downstream side of the dam.