Big-discharge efficient energy dissipater structure of narrow river valley arch dam

Abstract

The invention discloses a big-discharge efficient energy dissipater structure of a narrow river valley arch dam. Aiming to solve the problems that under the conditions of a narrow river valley and a deluge, the conventional arch dam project easily causes serious downstream washing damage and stability of slopes on the side banks is affected, the big-discharge efficient energy dissipater structure of the narrow river valley arch dam is structurally characterized by including flood discharge surfaces holes and flood discharge deep holes in the arch dam body at the river bed, and a downstream plunge pool of the arch dam, wherein the surface holes and the deep holes are flaring piers, and the bottoms of the openings of the surface holes and the deep holes are connected with flip buckets. The big-discharge efficient energy dissipater structure provided by the invention is capable of discharging deluge and endowed with the function of excellent energy dissipation, meets the requirement for safe flood discharge, meanwhile better solves the difficult problem of downstream energy dissipation, and ensures the project safety.

Description

technical field [0001] The invention relates to the field of water discharge structures of hydropower projects, in particular to a large discharge capacity and high efficiency energy dissipation structure of an arch dam in a narrow valley. Background technique [0002] Under the existing technical conditions, the general concrete arch dams in narrow valleys adopt the type of dam body flood discharge and deflected flow energy dissipation, usually with surface holes, middle holes, and deep holes, and deflected nose sills are set to raise the water flow high and throw it downstream far away. The foot of the dam, or collide with energy in the air, this structure works well in canyon areas with low flood flow; for large flood flow, set up spillway tunnels, bank spillways, etc. away from the dam on the bank to release water Buildings, but this structure requires the conditions for arranging drainage structures on the shore, and the project investment is relatively high. If the tr...

AI Technical Summary

Problems solved by technology

If the traditional deflector energy dissipation method is directly used in a narrow valley with a large flow, it will cause serious erosion damage downstream of the dam, endanger the stability of the slopes on both banks, and even cause the instability of the dam.

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