Dam downstream piping outlet protection structure

A protection structure and piping technology, used in protection devices, infrastructure engineering, buildings, etc., can solve the problems of pressure reduction of dam foundation, single filter layer, and insufficient connection, so as to improve the effect of reverse filter and pressure reduction. , prevent the loss of fine particles, good protection effect

Active Publication Date: 2018-11-13
CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the reverse filter layer gland mainly plays the role of reverse filter to prevent the loss of fine particles in the cover layer foundation, and fails to effectively decompress the confined water of the dam foundation. New piping channels may appear after the back pressure of the piping outlet, and the protection effect Not good; moreover, the connection of the reverse filter layer gland at the outlet of the pipe is not firm enough, the reverse filter layer is single, and the reverse filter effect is limited

Method used

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  • Dam downstream piping outlet protection structure
  • Dam downstream piping outlet protection structure
  • Dam downstream piping outlet protection structure

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with accompanying drawing.

[0023] Such as figure 1 As shown, the downstream piping outlet protection structure of the dam includes a back pressure filter part 2 arranged on the upper side of the piping outlet 11 and a reinforcement reclamation 3 arranged on the foundation surface 1 along the circumference of the back pressure filter part 2 . Wherein, the anti-pressure filter part 2 not only has the back-pressure effect but also has the anti-filter effect, and generally all constitutes a back-pressure layer and an anti-filter layer; the reinforcement reclamation 3 is mainly used for strengthening the structure so that the back-pressure filter part 2 is set more firmly and On the upper side of the piping outlet 11, the reinforced reclamation 3 is usually made of reinforced gabion masonry.

[0024] preferred, such as figure 2 As shown, the back pressure filter part 2 includes a gravel block layer 21,...

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Abstract

The invention discloses a piping outlet protection structure downstream of a dam which is firm to connect and good in protection effect. The protection structure comprises a counter-pressure and anti-filtration part and a reinforced retaining polder. The counter-pressure and anti-filtration part is arranged on the upper side of a piping outlet. The reinforced retaining polder is arranged on the foundation level in the circumferential direction along the counter-pressure and anti-filtration part. The arranged counter-pressure and anti-filtration part can achieve an anti-filtration effect to prevent fine particle loss in an overburden foundation, and can eliminate pressure on confined water on a dam foundation, so that the protection effect is good; and the arranged reinforced retaining polder can connect the counter-pressure and anti-filtration part with the reinforced retaining polder more stably, so that the anti-filtration and the pressure reduction effect is further improved.

Description

technical field [0001] The invention belongs to the field of water conservancy and hydropower engineering, and in particular relates to a protection structure for piping outlets downstream of a dam. Background technique [0002] For a high earth-rock dam on a deep overburden foundation, after the reservoir is impounded, the dam foundation contains high confined water below the water-resisting layer. When the thickness of the relative aquitard layer in the cover layer downstream of the dam is insufficient, piping damage is easily formed in the cover layer foundation downstream of the dam. [0003] In order to avoid piping damage, the existing measure is to install an anti-filter layer gland at the downstream piping outlet of the foundation dam with deep overburden layer for protection. However, the reverse filter layer gland mainly plays the role of reverse filter to prevent the loss of fine particles in the cover layer foundation, and fails to effectively decompress the con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D31/12
CPCE02D31/12
Inventor 王党在王晓东金伟余学明胡小红何顺宾叶发明韩永陈安荣何兴勇
Owner CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
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