Layout form of water-sediment separation buildings suitable for steep trough spillways with curves

Abstract

The invention discloses an arrangement form of water-sand separation buildings suitable for a steep trough spillway in a curve, which comprises a sand collection tank whose upstream end is connected with the spillway of the incoming flow and a steep trough spillway located in the downstream of the sand collection tank. The steep trough spillway is composed of a flow channel and a sand discharge channel arranged in parallel. The inlet bottom plate of the sand discharge channel is smoothly connected with the bottom plate of the sand collection tank. The inwardly inclined continuous floor with low wall side; the overflow channel connects with the sand collection tank through the overflow weir, and the flow channel floor of the bend section of the overflow channel is a stepped structure floor; the overflow surface of the overflow weir is a circular arc surface, which constitutes a sand guide wall that guides large particles and granular sediment in the water flow into the sand discharge channel. The invention can effectively realize the separation of granular sediment and water flow in high-velocity and high-sand content water flow, and can achieve the purposes of safe sand discharge, reduction of protection range, reduction of maintenance cost and improvement of project operation safety and the like.

Description

technical field [0001] The invention relates to water conservancy and hydropower projects and disaster prevention and mitigation projects, and is especially suitable for implementing water and sand separation in steep groove spillways with bends. Background technique [0002] At present, all kinds of flood control, water diversion, irrigation, disaster prevention and mitigation projects built in mountainous rivers must be equipped with sand prevention measures. Sand settling tanks are one of the most commonly used measures. Hydraulic structures with a relatively small sediment probability mainly include linear grit chambers, curved grit chambers, swirl type grit chambers, inclined plate type grit chambers, and funnel type grit chambers. The basic principles of low water velocity in the sand pool and the circulation of the bend realize the separation of water and sand, and there is almost no damage to the flow boundary. [0003] In water conservancy and hydropower projects o...

AI Technical Summary

Problems solved by technology

If the cavitation of water flow and the damage forms such as sediment particle impact and abrasion continue to superimpose, the damage of the overflow boundary of the spillway will be worse

The above-mentioned damage patterns will not only cause greater operational safety hazards, but also increase the difficulty and cost of maintenance in the later stages of the project.

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