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Extrusion-wall type geomembrane-faced rockfill dam

A geomembrane and extruded wall technology, applied in dams and other directions, can solve problems such as deformation, and achieve the effects of simplifying the dam body structure, fast filling and high reliability of the dam body

Active Publication Date: 2013-11-20
POWERCHINA XIBEI ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an extruded wall geomembrane face dam. Aiming at the safety problems of face rockfill dams, the respective advantages and comprehensive advantages of geomembrane, extruded wall and rockfill materials are fully utilized to solve the technical problem of face rockfill dams. Rockfill dams mainly consider the problems of face plate deformation, stress and concrete face joint water-stop materials, and can significantly enhance the reliability, durability, earthquake resistance and safety of the dam body's anti-seepage structure, and have good social, economic and social benefits. Environmental Ecological Benefits

Method used

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  • Extrusion-wall type geomembrane-faced rockfill dam

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Such as figure 1 As shown, the extruded wall geomembrane face dam has a trapezoidal dam body 1 made of stone materials, and the slopes on both sides of the dam body 1 are the upstream side dam 6 and the downstream side dam 7 respectively.

[0018] The slope ratio of the upstream side dam 6 is 1:m, the slope ratio of the downstream side dam 7 is 1:n, the surface of the upstream side dam 6 is the cushion layer area 11, and the cushion layer area 11 is specifically filled with rockfill materials, including blocks Stone, gravel or a mixture of the two. The bedding area 11 is a transition area.

[0019] The selection of rockfill materials must meet the relevant requirements of the "Code for Design of Concrete Faced Rockfill Dams" (DL / T5016-2011, SL228-98).

[0020] The top of the dam body 1 is provided with a wave wall 8 , the bottom of the upstream side dam 6 is provided with a toe board 9 , and the bottom of the toe board 9 is provided with a curtain grouting 10 , and th...

Embodiment 2

[0027] Such as figure 1 As shown, among the slopes on both sides of the dam body 1, the slope ratio 1:m of the upstream side dam 6 is 1: (1.35—2.5), and the downstream side dam 7 is slightly steeper than the upstream side dam 6, and its slope ratio 1:n is 1: (1.25—2.5).

[0028] Such as figure 2 As shown, according to the situation of the upstream side dam 6 and the downstream side dam 7, the top width a of each step of the extruded wall 3 is 10 cm, the height t is 40 cm, and the height t of the extruded wall 3 and the bottom width b are constant. angle with a slope ratio of 0.125. The above parameters must meet the requirements of the "Code for Design of Concrete Face Rockfill Dams" (DL / T5016-2011, SL228-98).

[0029] Adopt the same method as in Example 1 to construct this extruded wall-type geomembrane face dam, which will not be described in detail here. Among them, for the structure of the dam body, the settlement, deformation, stress and slope stability of the dam bod...

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Abstract

The invention discloses an extrusion-wall type geomembrane-faced rockfill dam, relates to the field of geomembrane-faced rockfill dam construction, and aims at face rockfill dams. The extrusion-wall type geomembrane-faced rockfill dam at least comprises a dam body, a geomembrane, an extrusion wall, a protective layer and a protective slop, and is characterized in that the dam body is trapezoidal, inclined planes on two sides of the dam body refer to an upstream side dam and a downstream side dam, and the surface of the upstream side dam is paved with the geomembrane; the extrusion wall is disposed on the downstream of the geomembrane, in other works, the extrusion wall is sandwiched between the geomembrane and the upstream side dam, and the protective layer and the protective slop are arranged on the upstream of the geomembrane. The extrusion-wall type geomembrane-faced rockfill dam aiming at the security problems of the ultral-high face rockfill dams has the advantages that both independent advantage and comprehensive advantages of the geomembrane, the extrusion wall and rockfill materials are fully exerted, reliability, durability, aseismicity and security of a dam seepage control structure are enhanced, and the dam has good social, economic and environmental ecological benefits.

Description

technical field [0001] The invention relates to the field of earth-rockfill dam construction, and is aimed at face face rockfill dams, and is an extruded wall type geomembrane face face dam. Background technique [0002] The face rockfill dam is a new type of dam developed in the late 1970s. In practice, it has the characteristics of safety, economy, convenient construction and good adaptability. Although it started late, it developed rapidly. It is favored by the dam industry. As of September 2011, the number of projects, dam heights and project scales of concrete face rockfill dams that have been built, are under construction and are planned to be built in the world rank among the top. There are more than 270 concrete face rockfill dams built or under construction in my country so far, accounting for 50% of the world's total. With the accumulation of dam construction experience and the improvement of the design level, the height of the face rockfill dam is still increasi...

Claims

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Application Information

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IPC IPC(8): E02B7/04
Inventor 蔡新合
Owner POWERCHINA XIBEI ENG
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