Composite geomembrane anti-seepage structure capable of automatically adapting to weir body deformation and construction method

A composite geomembrane and self-adaptive technology, which is applied in similar engineering fields, can solve problems such as expansion joints that are difficult to deploy and lose their proper functions, so as to reduce strain concentration, reduce tensile or shear damage, and reduce the degree of damage Effect

Active Publication Date: 2016-04-06
POWERCHINA HUADONG ENG COPORATION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At the joint between the composite geomembrane and the shore toe board and the cut-off wall, since the composite geomembrane is laid on the particle filler with a small modulus, there is a relatively large relative displacement with the rigid connection. Install horizontally stacked expansion joints, but this type of expansion joint is easily compressed by the overlying filler and water load, making it difficult to expand and lose its due effect

Method used

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  • Composite geomembrane anti-seepage structure capable of automatically adapting to weir body deformation and construction method
  • Composite geomembrane anti-seepage structure capable of automatically adapting to weir body deformation and construction method
  • Composite geomembrane anti-seepage structure capable of automatically adapting to weir body deformation and construction method

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Experimental program
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Effect test

Embodiment 1

[0033] Embodiment one: if figure 1 , figure 2 As shown, the concrete structure in this example is a concrete plinth 1, one side of the plinth is the shore bedrock 15, and the other side is connected with the cushion layer 5, and the bottom plate of the concrete plinth 1 and the shore bedrock are connected by anchor bars 4 is connected with the consolidation grout 2 and the grouting curtain 3 is set along the axis of the concrete plinth 1; The inner end of the upper protective layer PE film 10 and the subsequent part of the lower protective layer PE film 6 are respectively covered on the U-shaped expansion joint 7 and the auxiliary horizontal expansion joint by painting asphalt with a thickness of 0.2mm and the surface of the concrete toe slab 1. 9 upper and lower surfaces.

[0034] The construction method of embodiment one is as follows:

[0035] a. Concrete plinth 1 and anti-seepage system setting: one side of the concrete plinth 1 is the shore bedrock 15, which provides ...

Embodiment 2

[0042] Embodiment two: if figure 2 , image 3 As shown, the concrete structure of this example is an anti-seepage wall 12, and the top of the anti-seepage wall is a concrete cap 13 and a guide wall 14; The inner end of the lower protective layer PE film 6 is bonded to the surface of the concrete cap 13 by painting asphalt with a thickness of 0.2mm, and the subsequent parts of the upper protective layer PE film 10 and the lower protective layer PE film 6 are respectively covered on the U-shaped expansion joint 7 and The upper surface and the lower surface of the auxiliary horizontal expansion joint 9.

[0043] The construction method of embodiment two is as follows:

[0044] a. Concrete anti-seepage wall 12 and anti-seepage system setting: the upper end of the concrete anti-seepage wall 12 is a concrete cap 13 and a guide wall 14, and the two sides of the concrete cap 13 are connected to the cushion layer 5;

[0045] b. Setting of cushion layer 5: below the cushion layer 5 ...

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Abstract

The invention relates to a composite geomembrane anti-seepage structure capable of automatically adapting to weir body deformation and a construction method, and aims to reduce a damaged condition at a joint of a composite geomembrane and a concrete toe board or at a lap joint of the composite geomembrane and a concrete cover cap on the top of a concrete anti-seepage wall. According to the technical scheme adopted by the invention, the anti-seepage structure comprises a concrete structure and a padding layer connected to the concrete structure, wherein the composite geomembrane with an anti-seepage structure is arranged between the concrete structure and the padding layer; the composite geomembrane comprises an upper protective layer PE film, a lower protective layer PE film, a U-shaped telescopic joint and an auxiliary horizontal telescopic joint, wherein the U-shaped telescopic joint is vertically arranged, the U-shaped opening of the U-shaped telescopic joint faces upwards; one end of the U-shaped telescopic joint is fixed into the concrete structure, and the other end of the U-shaped telescopic joint horizontally extends and is connected to one end of the auxiliary horizontal telescopic joint; the other end of the auxiliary horizontal telescopic joint is connected to other anti-seepage geomembranes of a weir body; one end of each of the upper protective layer PE film and the lower protective layer PE is bonded with the concrete structure, and the other ends of the upper protective layer PE film and the lower protective layer PE cover by complying with the shape of the telescopic joint to synchronously extend outwards.

Description

technical field [0001] The invention relates to a composite geomembrane anti-seepage structure and a construction method capable of automatically adapting to the deformation of a weir body, and is mainly suitable for high earth-rock cofferdams, earth-rock dams and similar projects using composite geomembrane anti-seepage in hydropower and water conservancy projects. Background technique [0002] With the implementation of my country's western development strategy, the height and scale of earth-rock cofferdams are increasing year by year. Due to the convenience and economy of construction, many cofferdams adopt the anti-seepage type of inclined wall composite geomembrane. The technical difficulty of high earth-rock cofferdam also increases with the increase of the scale of the cofferdam. At the joint between the composite geomembrane and the shore toe board or the joint between the cut-off wall, due to the water pressure and self-weight, the overall deformation of the weir bod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B3/16
CPCE02B3/16E02D17/00E02B3/10E02B7/06
Inventor 王永明蔡建国梁现培任金明邓渊李军吴关叶黄雷
Owner POWERCHINA HUADONG ENG COPORATION LTD
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