Flood discharge and energy dissipation structure of narrow valley, deep tail water and ultra-large unit width flow curve gravity dam

Abstract

The invention discloses a flood discharge and energy dissipation structure of a narrow valley, a deep tail water and an ultra-large unit width flow curve gravity dam. An overflow dam section of a curve gravity dam is composed of a curve overflow weir and partition piers erected on the weir crest of the curve overflow weir, a flow passing surface hole meeting the flow leakage requirement is formed,a fan-shaped bucket type stilling basin is connected behind the curve overflow weir, and a stilling tail sill is in an arc form and concentric with the dam axis. Wide tail piers are additionally arranged at the tail positions of the overflow surface hole partition piers. The fan-shaped bucket type stilling pool is composed of a straight section and a slope section. The body type of the wide tailpier is T-shaped, Y-shaped or X-shaped, and two-dimensional water flow in a bucket pool can be changed into stable and complete three-dimensional bucket type water flow. The flood discharge and energydissipation structure is simple, practical and convenient to operate, the construction cost can be greatly saved, and the flood discharge and energy dissipation problems of narrow river valleys, deeptail water and ultra-large unit width flow water conservancy and hydropower engineering can be effectively solved.

Description

technical field [0001] The invention relates to a flood discharge and energy dissipation structure of a curved gravity dam, in particular to a flood discharge and energy dissipation structure for a gravity dam with narrow valleys, deep tail water and super large single wide flow curve. Background technique [0002] Large discharge volume, large single-width discharge, and narrow river valleys are one of the common technical characteristics of large-scale water conservancy and hydropower projects in my country. In order to meet the flood discharge requirements of the project, it is necessary to arrange the overflow front of the dam body in a curved form. If the project adopts a gravity dam, it will form Curved gravity dam. Curvilinear gravity dams in existing projects usually adopt the energy dissipation method of underflow or deflected flow. When the single-width flow rate is large, if the underflow energy dissipation is directly used, due to the small Froude number, wavy hyd...

AI Technical Summary

Problems solved by technology

When the downstream tail water is deep, the stilling basin can be used to dissipate energy. The conventional stilling basin has a rectangular structure. If the river valley is narrow, the excavation volume of the stilling basin will increase and the construction difficulty will increase.

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