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Earth-rock dam deep-base seepage-control water-stopping structure for water conservancy and hydropower project

A water conservancy and hydropower, dam foundation anti-seepage technology, applied in water conservancy projects, marine engineering, construction, etc., can solve the problems of inability to adapt to the depth of the dam foundation and the requirements of the anti-seepage structure, control within 70m, and prominent anti-seepage problems, etc. The effect of preventing leakage, improving rationality, improving impermeability and durability

Active Publication Date: 2008-06-18
POWERCHINA CHENGDU ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Reservoir dams usually involve relatively complex foundation conditions. Statistics show that, limited by design theory, construction equipment and technology, as well as reasonable construction period and economic requirements of the project, the foundation anti-seepage depth of early reservoir dams is generally controlled at 70m Within; only the dam body anti-seepage layer extending from the top of the dam body to the bottom of the dam body, while the base layer adopts ordinary structure design and is made of simple masonry. Due to the hydrometeorological conditions, topographic and geological conditions, the existing design cannot meet the requirements of the depth of the dam foundation and the anti-seepage structure of the existing hydropower dam, and the problem of anti-seepage of the deep foundation of the dam is becoming more and more prominent

Method used

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  • Earth-rock dam deep-base seepage-control water-stopping structure for water conservancy and hydropower project
  • Earth-rock dam deep-base seepage-control water-stopping structure for water conservancy and hydropower project
  • Earth-rock dam deep-base seepage-control water-stopping structure for water conservancy and hydropower project

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Embodiment 1

[0030] Embodiment 1: as shown in Figure 1, Figure 3 ~ Figure 5 Shown is the deep foundation anti-seepage and water-tight structure of the present invention for face rockfill dams. The deep anti-seepage layer of the dam foundation is divided into two sections of the upper anti-seepage layer 4 and the lower anti-seepage layer 6 by the reinforced concrete connecting corridor 5 , the upper anti-seepage layer 4 strong water-permeable foundation adopts concrete anti-seepage wall for anti-seepage, ground construction, the maximum wall depth is 80m; the lower anti-seepage layer 6 foundation has medium to weak water permeability, and 3 rows of grouting curtains are used for anti-seepage, in corridor 5 For construction, the maximum depth of the curtain is 120m, and the bottom of the curtain is 3-5m deep into the impermeable foundation; the net size of corridor 5 is controlled by the need of curtain construction, and is determined to be 3m×3.5m.

Embodiment 2

[0031] Embodiment 2: as shown in Figure 2, Figure 6 ~ Figure 7 Shown is the deep foundation anti-seepage and water-proof structure used in the core wall rockfill dam of the present invention. On the basis of the above-mentioned structural form, the deep anti-seepage body of the dam foundation is divided into the upper anti-seepage with the reinforced concrete connecting corridor 5 as the boundary There are two sections of layer 4 and lower anti-seepage layer 6. The strong permeable foundation of the upper anti-seepage layer 4 adopts concrete anti-seepage wall for anti-seepage, ground construction, and the maximum wall depth is 80m; the foundation of the lower anti-seepage layer 6 has strong to medium water permeability, and the first 60m adopts The concrete anti-seepage wall and the rear 60m adopt grouting curtain, and the bottom of the curtain is 3-5m deep into the impermeable foundation; the net size of corridor 5 is controlled by the construction requirements of the anti-se...

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Abstract

The present invention discloses an anti-seepage sealing structure of the deep foundation of the earth-rockfill dam of a water conservancy and hydropower project, which can effectively prevent the seepage of the dam. The anti-seepage sealing structure of the deep foundation of the earth-rockfill dam of the water conservancy and hydropower project includes the anti-seepage layer of the dam body which is stretched from the top of the dam body to the bottom of the dam body, and the anti-seepage layer of a dam base, which is jointed with the anti-seepage layer of the dam body, is arranged in the dam base of the bottom of the dam body. By arranging the anti-seepage layer of the dam base in the dam base, the anti-seepage sealing structure can effectively prevent water seepage in the dam, thus increasing the anti-seepage property and durability of the whole dam and the foundation. Moreover, according to the different distributions of permeable layers from strong to weak in the dam base, the anti-seepage layers are arranged accordingly, thus improving the rationality of the anti-seepage structure, and particularly, the present invention is suitably applied on water conservancy and hydropower dams.

Description

technical field [0001] The invention relates to a water conservancy dam, in particular to a water conservancy and hydroelectric project earth-rock dam deep foundation anti-seepage and water-proof structure. Background technique [0002] At present, hydropower belongs to the clean utilization of renewable water energy resources, and vigorously developing water energy resources is an important energy strategic development policy in my country. The construction of local material dams has a long history, and has the advantages of local materials, low requirements on geological conditions, simple construction, and low cost. Advantages, has been widely used, and has rich experience in design and construction. At present, local material dams usually use clay homogeneous dams, gravel soil core (slanted wall) rockfill dams, concrete face rockfill dams, asphalt core (slanted wall) rockfill dams, etc. from the top to the bottom of the dam body. It is the first choice for the design and...

Claims

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Application Information

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IPC IPC(8): E02B3/16
Inventor 郑声安陈五一郝元麟余挺叶发明何顺宾胡永胜王晓东汪荣大余学明伍小玉
Owner POWERCHINA CHENGDU ENG
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