Water recession and desilting structure of silt-laden channel

Abstract

The invention discloses a recession and desilting structure of a silt-laden channel. The recession and desilting structure comprises an upstream channel, a downstream channel, a recession and desilting channel, a desilting basin, a check gate and a recession and desilting gate. The upstream channel and the downstream channel are connected through a bend, the bend serves as a desilting basin, by means of the principle of forward sand flushing and bend water taking, the downstream channel is connected to a bend convex bank, the water recession and desilting channel is connected to a bend concave bank, and a water recession and desilting gate and a check gate are arranged at inlets of the water recession and desilting channel and the downstream channel respectively. During irrigation, the check gate is opened, the water-recession sand-discharging gate is closed, water flows through the curve, and sand and stones are deposited in the sand basin due to inertia; during sand discharging, the check gate is closed, the water-recession sand discharging gate is opened, the water flow of the water-recession sand discharging channel is increased, and overflowing sand pulling is increased through the channel, so that silt deposited in the channel is discharged.

Description

technical field [0001] The invention belongs to the field of water conservancy engineering, and relates to a water-regression and sand-removal structure for channels with many sediments. Background technique [0002] At present, among domestic irrigation channels, it is a conventional design idea to design a drainage channel to discharge excess water to ensure the safety of the channel during the flood period. In the existing design schemes, the drainage channel often adopts side weir drainage, and the side weir is often open. Type wide-top weir, or add gates to increase the overflow depth of the drainage channel and increase the overflow capacity. None of the above considerations have considered the problem of sediment deposition on the channels with many sediments in the plain. The setting of the backwater channels is mainly to discharge excess water and cannot solve the problem of deposition in long-distance channels. SUMMARY OF THE INVENTION [0003] In view of the de...

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Problems solved by technology

None of the above considerations considers the problem of sediment deposition on plain sediment-rich channels. The setting of r

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