Partial plunge pool type stilling basin

Abstract

The invention relates to a water conservancy facility, and specifically relates to a partial plunge pool type stilling basin. The partial plunge pool type stilling basin sequentially comprises a drop sill, a front shallow-water cushion, a plunge pool, a rear shallow-water cushion, an end sill and a downstream apron, wherein the front shallow-water cushion is connected to the bottom part of the drop sill; the sunken plunge pool is arranged at the rear side of the front shallow-water cushion; the uplifted rear shallow-water cushion is arranged at the rear side of the plunge pool; the end sill is arranged at the rear side of the rear shallow-water cushion. According to the partial plunge pool type stilling basin, the front shallow-water cushion and the rear shallow-water cushion of the stilling basin can perform the buffering function of a water cushion of the general stilling basin when the downstream water is at high level; the plunge pool in the middle can form a deep water cushion for the discharged water. Therefore, the water swirly rolls in the plunge pool and cannot indirectly impact a bottom plate of the stilling basin, and the speed of the water running close to the bottom can be effectively reduced; the rest energy can be dissipated again when the water runs through the end sill in the downstream, so that the bottom plate of the stilling basin can be certainly protected while good energy dissipating effect is ensured; the partial plunge pool type stilling basin is high in adaptability to the discharged flow.

Description

technical field [0001] The invention relates to a water conservancy facility, in particular to a local pad pond type stilling pool. Background technique [0002] Underflow energy dissipation is a form of energy dissipation that utilizes hydraulic jumps to transform the flow state and disinfect energy in the stilling pool. Underflow energy dissipation is not limited by the foundation, and has the advantages of stable flow state and little influence of atomization. The flow velocity is generally large, and the hydraulic jump flow state is restricted by the inlet Froude number and the downstream water depth, so the adaptability is relatively small. Water cushion ponds are mostly used in deflected flow energy dissipation methods. They have a simple shape, low requirements for upstream and downstream water flow conditions, and strong adaptability, but have high requirements for riverbed geological conditions, and the impact pressure of the bottom plate is large. The requirements ...

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Problems solved by technology

[0002] Underflow energy dissipation is a form of energy dissipation that utilizes hydraulic jumps to transform the flow state and disinfect energy in the stilling pool. Underflow energy dissipation is not limited by the foundation, and has the advantages of stable flow state and little influence of atomization. The flow velocity is generally large, and the hydraulic jump flow state is restricted by the inlet Froude number and the downstream water depth, etc., and the adaptability is small

Water cushion ponds are mostly used in deflected flow energy dissipation methods. They have a simple shape, low requirements for upstream and downstream water flow conditions, and strong adaptability, but have high requirements for riverbed geological conditions, and the impact pressure of the bottom plate is large. The requirements are high, and the ridge itself is prone to damage under the action of high-speed water flow. In addition, the influence of atomization downstream of the energy dissipation of the deflection is generally relatively large

[0003] In general shallow water cushion stilling pools, the water cushion formed at the bottom of the pool is used as a "flexible floor" to exert an opposite flexible force on the water flowing into the pool to reduce the hydraulic index near the bottom. However, for large flow discharge, separate Shallow water pad stilling pool is used, the energy dissipation water body is insufficient, so the energy dissipation effect is limited

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