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Surface hole structure in dam body of high concrete dam

A technology of concrete dams and surface holes, which is applied in water conservancy projects, sea area projects, coastline protection, etc., can solve problems such as difficult to achieve results, achieve good adaptability, improve energy dissipation rate, and increase shear area effects

Active Publication Date: 2016-11-16
POWERCHINA HUADONG ENG COPORATION LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for projects with narrow valleys and limited energy dissipation areas behind dams, it is often difficult to achieve ideal results

Method used

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  • Surface hole structure in dam body of high concrete dam
  • Surface hole structure in dam body of high concrete dam

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Embodiment Construction

[0014] Such as figure 1 , figure 2 Shown, the surface hole structure of the dam body of the high concrete dam of the present embodiment includes the surface hole 1 with the flood discharge function of the dam body, the entrance width of the surface hole 1 is B1=12m, and there are side walls 2 on both sides of the surface hole 1. A wedge-shaped body 3 with a length D1=13m, a width D2=3m, and a height D3=12m is arranged symmetrically on the side wall near the outlet of the flow channel, and the two wedge-shaped bodies 3 are gathered in the middle, so that the water tongue from the surface hole can go downstream along the river channel Pull it apart vertically and pull it up. At the same time, by setting a hollow 4 with a length of L1 at the outlet end of the flow channel bottom plate of the surface hole 1, the outlet tongue of the surface hole is further pulled longitudinally to the upstream of the water cushion pond or the stilling pond, and the water cushion pond or the stil...

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Abstract

The invention relates to a surface hole structure in a dam body of a high concrete dam. The surface hole structure in the dam body of the high concrete dam is simple, stable, firm, high in applicability, and simple and convenient to construct and can achieve the purposes of reducing the impact of outflowing water jet of a surface hole on an energy dissipation area at the back of the dam, ensuring the construction safety and decreasing the workload of energy dissipation and impact treatment at a downstream. According to the technical scheme, the dam body of the high concrete dam comprises a surface hole capable of releasing flood water. The surface hole structure in the dam body of the high concrete dam is characterized in that a wedge-shaped body which can contract to the middle is arranged close to each of the two sidewalls and an outlet of a flowing channel of the surface hole; a hollow part with the length of L1 is arranged at the outlet end of a bottom plate of the flowing channel of the surface hole. The surface hole structure in the dam body of the high concrete dam is applicable to narrow-river-valley, high-waterhead and large-discharge concrete dam engineering.

Description

technical field [0001] The invention relates to water conservancy and hydropower civil engineering, in particular to a dam body surface hole structure of a high concrete dam. It is especially suitable for concrete dam projects with narrow river valleys, high water head and large discharge capacity. Background technique [0002] High concrete dam projects generally make full use of the flood discharge at the orifice of the dam body, and the energy dissipation of the cushion pond or stilling basin behind the dam. Since the surface hole has a strong excess discharge capacity and the control of the gate is more convenient, it is generally preferred. But at the same time, due to the low flow velocity of the surface hole, the generally short flow channel, and the generally small maximum distance of the outlet water tongue, it is difficult for the water tongue to diffuse vertically and horizontally in the air, which causes the surface hole water tongue to enter the pond (or Ponds)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B8/06
CPCE02B8/06
Inventor 殷亮侯靖徐建军黄维魏海宁张帅黄熠辉
Owner POWERCHINA HUADONG ENG COPORATION LTD
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