Combined type folding dam and construction method thereof

Abstract

The invention discloses a combined type folding dam and a construction method thereof. The combined type folding dam comprises a folding dam body, a dam base plate, an edge pier, a middle pier, a pump room, an overhaul channel and the like, and is characterized in that the folding dam body is fixedly hinged to the dam base plate; two ends of the folding dam body are movably pressed against the edge pier A and the middle pier; when water is filled into the folding dam body, the folding dam body can be automatically lifted to stop and accumulate water from the upstream of a riverway; when the water in the folding dam body is drained, the folding dam body can be inclined towards the downstream, and the dam height is automatically reduced; and water flow overflows from the top of the folding dam body and flows into a riverbed after being subjected to energy consumption through an apron. The dam is suitable for a stratum of a wide and shallow river valley, so that requirements on adjustment of library capacity, overflowing from the top of the dam and large discharging flow can be met; and the combined type folding dam has the characteristics of good water flow state, automatic control over dam height, simple structure, convenience in operation, simplicity in construction and maintenance and the like and is a hydraulic structure capable of stopping and releasing the water.

Description

technical field [0001] The invention relates to an overflow weir capable of automatically raising and lowering the height, in particular to a combined folding weir and a construction method thereof. Background technique [0002] At present, for the terrain and water flow conditions of wide and shallow river valleys, large discharge volumes, and low water heads in water conservancy projects, rubber dams that can automatically raise and lower the dam height, have no gate piers in the valley to block the water flow, and dam crest overflows are often used to achieve design goals. Since the rubber sheet dam shell is an elastic body, when the dam shell is filled with water to a certain amount, under the action of gravity, the rubber sheet dam shell will expand to both sides without raising, so that the dam height of the rubber dam is limited. It affects the application of this type of dam. Contents of the invention [0003] Aiming at the deficiencies of existing rubber dams, th...

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Problems solved by technology

Since the rubber sheet dam shell is an elastic body, when the dam shell is filled with water to a certain amount, under the action of gravity, the rubber sheet dam shell will expand to both sides without raising, so that the dam height of the rubber dam is limited. Affect the use of this type of dam

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