A high arch dam flood discharge and energy dissipation facility with the floor on both sides gradually raised

Abstract

The invention discloses a high arch dam flood discharge and energy dissipation facility with gradually-elevated bottom plates on two sides. The facility comprises multiple overflow surfaces holes formed in an arch dam, and a plunge pool arranged on the downstream of the overflow surface holes and corresponding to the overflow surface holes. The overflow surface holes comprise low-position overflowsurface holes located in the middle, and high-position overflow surface holes located in the two sides, wherein the bottom elevation of the low-position overflow surface holes is low, and the bottomelevation of the high-position overflow surface holes is high. Among the overflow surface holes, with the high elevation, in the two sides, the bottom elevation of the overflow surface holes in the inner side is lower than the bottom elevation of the overflow surface holes in the outer side. The plunge pool is a compound fracture surface plunge pool. The pool bottom of the plunge pool comprises acenter bottom plate and step bottom plates which are located on the bank slopes of the two sides of the center bottom plate and are sequentially elevated step by step. The center bottom plate corresponds to water tongues jetted from the low-position overflow surface holes. The step bottom plates correspond to water tongues jetted from the high-position overflow surface holes. According to the facility, under the conditions of the same flow discharge amount and the stable and safe bank slopes of the plunge pool, the excavation amount of the plunge pool is reduced, and the project investment isreduced.

Description

technical field [0001] The invention belongs to the technical field of energy dissipation for arch dams in water conservancy and hydropower projects, and in particular relates to a flood discharge and energy dissipation facility suitable for high arch dams. Background technique [0002] Arch dams are a common type of dam in water conservancy and hydropower projects. High arch dams are usually built in narrow river valleys. The main characteristics of their flood discharge and energy dissipation are: high water head, large flow, and narrow river valleys, so the single-width discharge and single-width flood discharge power are also particularly large, and the geological conditions of the valley in the dam area complex. This makes the problems of flood discharge, energy dissipation and scour prevention of high arch dams more prominent, and has become one of the key technical problems in the construction of high arch dams. [0003] When the arch dam uses the overflow surface h...

AI Technical Summary

Problems solved by technology

Since the bridleway is considered from the perspective of convenient traffic, its width is limited, and it cannot increase the stability of the slope very well.

In addition, the existing form of the pond determines that the water inlet area of ​​the water tongue must be within the scope of the bottom of the pond, and the water flow cannot hit the bank slope of the pond, otherwise it may directly destroy the pond

Images