Seepage prevention method and structure of rockfill dam upstream surface

Abstract

The invention discloses an anti-seepage method and structure of the upstream surface layer of a rockfill dam. The method is constructed according to the following steps: excavating the concrete base and the rockfill foundation surface of the dam body, and completing the concrete pouring of the concrete base and the water-stop copper After the concrete foundation meets the strength requirements, the anti-seepage curtain construction is carried out; the drainage body construction of the dam body is carried out; the filling and rolling of the rockfill body and the gravel cushion are carried out; After the settlement is stable, the construction of the surface flexible anti-seepage body is carried out; the metal mesh is placed on the dam surface, and then stones are laid in the metal mesh; the surface flexible asphalt construction is carried out by pouring; the above steps are repeated until the construction is completed. The invention has the effect of multi-layer anti-seepage, and because the surface anti-seepage body is a flexible structure, it can well adapt to the deformation of the rockfill material of the dam body, and at the same time simplifies the construction procedure of the anti-seepage body, and has the advantages of simple structure, economy and Features that facilitate construction.

Description

technical field [0001] The invention relates to an anti-seepage method and structure of an upstream surface layer of a rockfill dam, and belongs to the technical field of anti-seepage of water conservancy projects. Background technique [0002] Rockfill dams have obvious advantages because they can use local materials according to the location, but there are often technical problems caused by construction interference, lack of anti-seepage materials, or damage to anti-seepage bodies during construction. [0003] Some of the existing anti-seepage structures of rockfill dams are to construct anti-seepage bodies inside the dam, and some are to arrange anti-seepage bodies on the dam surface. However, in engineering construction, due to the large difference between the deformation of the anti-seepage body and the deformation of the rockfill material, leakage channels will be formed, or the construction interference of the rockfill body and the anti-seepage body will affect the co...

AI Technical Summary

Problems solved by technology

However, in engineering construction, due to the large difference between the deformation of the anti-seepage body and the deformation of the rockfill material, leakage channels will be formed, or the construction interference of the rockfill body and the anti-seepage body will affect the construction period and other unfavorable factors.

Therefore, the existing anti-seepage structure of rockfill dam is still not ideal.

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