River bank-like flood spillway

Abstract

The invention discloses a river bank-like flood spillway which comprises a control section, a discharge chute and a stilling pool. A gate pier of the control section is prolongated towards the lower reach of the river to form a central pier in the discharge chute. A wide tail pier capable of enabling the water flows to form contracting jet flows is arranged at the tail end of the central pier. The wide tail pier enables the discharged water flows of the flood spillway to form longitudinally spread platy jet flows which scatter in the air and are mixed with air and then enter the stilling pool to form ternary hydraulic jump energy dissipation. The wide tail pier is X-shaped or Y-shaped. According to the invention, the X-shaped or Y-shaped wide tail pier is arranged in the flood spillway, so not only can the energy be sufficiently dissipated, and can flood discharge atomization be reduced, but also the length of the stilling pool can be shortened, and the work amount and the project investment can be reduced. The water surface at the lower reaches is smooth and the scouring is slight. The river bank-like flood spillway has the beneficial effects that the damage and influences to the ecological environment as well as to side slopes in a nodal region are alleviated, and the construction difficulty is reduced. Therefore, the river bank-like flood spillway gains good social and economic benefits.

Description

technical field [0001] The invention relates to a spillway in a water conservancy and hydropower project, that is, an "X" or "Y" wide tail pier is arranged in a river bank spillway to achieve the purpose of energy dissipation. Background technique [0002] A spillway in a hydropower project usually includes a control section, a chute and a stilling basin. There are generally two types of energy dissipators used in spillways: skid flow energy dissipation and stilling basin energy dissipation. However, due to the atomization of the flood discharge and the depth of the scoured pit, the energy dissipation of the deflection flow has a greater impact on the production and life of the downstream residents and the protection of the slope, while the energy dissipation of the stilling basin has a large amount of excavation and the excavation margins due to the long length of the stilling basin. The slope is high, the construction difficulty and engineering investment are relatively l...

AI Technical Summary

Problems solved by technology

However, due to the atomization of the flood discharge and the depth of the scoured pit, the energy dissipation of the deflection flow has a greater impact on the production and life of the downstream residents and the protection of the slope, while the energy dissipation of the stilling basin has a large amount of excavation and the excavation margins due to the long length of the stilling basin. The slope is high, the construction difficulty and engineering investment are relatively large

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