Hedging type flood discharging and energy dissipation structure and method

Abstract

The invention discloses a hedging type flood discharging and energy dissipation structure and method. The hedging type flood discharging and energy dissipation structure comprises a stilling basin, atunnel is arranged on the periphery of the stilling basin, one end of the tunnel communicates with a reservoir, and the other end of the tunnel correspondingly communicates with two opposite inner side walls of the stilling basin through branched pipes. By adopting the technical scheme of the hedging type flood discharging and energy dissipation structure, during the flood discharging of the reservoir, a valve A and a valve B are opened, so that water flow in the reservoir flows into the stilling basin sequentially through the tunnel, the branched pipes and the two opposite inner side walls ofthe stilling basin, the water flow mutually hedges and collides a flood discharging water tongue in the stilling basin, energy of the flood discharging water tongue and own jet flow is dissipated inthe collision process, and then the water flow falls to the bottom of the stilling basin. A water cushion is arranged at the bottom of the stilling basin to eliminate the rest energy in the water flow, so that the energy in the water flow is sufficiently dissipated, the washing of an underwater bed, a bank slope and other buildings is reduced, the energy dissipation efficiency is improved, the safety of the downstream buildings is ensured, and the washing action force of the water cushion is reduced.

Description

technical field [0001] The invention specifically relates to the technical field of water conservancy and hydropower engineering, in particular to a hedging flood discharge energy dissipation structure and method. Background technique [0002] In recent decades, domestic water conservancy and hydropower construction has developed rapidly, and downstream energy dissipation and anti-scour buildings are one of the important parts that affect the safe operation of hydropower projects. Therefore, flood discharge and energy dissipation are very prominent key technical issues. Flow energy dissipation, bottom flow energy dissipation, and surface flow energy dissipation, the water flow velocity at the outlet of the drainage structure is high and the kinetic energy is large, which will cause serious erosion deformation to the downstream riverbed and bank slope, endangering the safety of downstream buildings. When the high-speed and strong turbulent water flows through the stilling bas...

AI Technical Summary

Problems solved by technology

[0002] In recent decades, domestic water conservancy and hydropower construction has developed rapidly, and downstream energy dissipation and anti-scour buildings are one of the important parts that affect the safe operation of hydropower projects. Therefore, flood discharge and energy dissipation are very prominent key technical issues. Flow energy dissipation, bottom flow energy dissipation, and surface flow energy dissipation, the water flow velocity at the outlet of the discharge structure is high and the kinetic energy is large, which will cause serious erosion deformation to the downstream riverbed and bank slope, endangering the safety of downstream buildings

When the high-speed and strong turbulent water flows through the stilling basin, it is easy to cause serious erosion damage to the bottom plate of the stilling basin

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