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Seepage preventing method and structure for upstream face surface layer of rock-fill dam
The invention discloses a seepage preventing method and structure for an upstream face surface layer of a rock-fill dam. The method is performed by the following steps: rock-fill construction foundation surfaces of a concrete base and a dam body are dig to finish the concrete casting of the concrete base and the pre-embedding and protection of water stop copper pieces; after the concrete base satisfies the strength requirements, a seepage preventing curtain is constructed; a drain body of the dam body is constructed; a rock-fill body and a gravel cushion layer are filled and grinded; after the dam body is filled by a certain elevation and stably settled, a flexible seepage preventing body on the surface layer is constructed; a metal net is placed on a dam surface; then, stones are laid in the metal net; flexible asphalt is filled in the surface layer; and the steps are repeated until the construction is finished. The method achieves a multi-layer seepage preventing effect; as the seepage preventing body on the surface layer is a flexible structure, the deformation of rock-fill materials of the dam body can be preferably adapted to, and meanwhile, the construction procedures of the seepage preventing body are simplified; and the method has the characteristics of simple structure, good in economical performance and convenience for construction.
Seepage preventing method and structure for upstream face surface layer of rock-fill dam
The invention discloses a seepage preventing method and structure for an upstream face surface layer of a rock-fill dam. The method is performed by the following steps: rock-fill construction foundation surfaces of a concrete base and a dam body are dig to finish the concrete casting of the concrete base and the pre-embedding and protection of water stop copper pieces; after the concrete base satisfies the strength requirements, a seepage preventing curtain is constructed; a drain body of the dam body is constructed; a rock-fill body and a gravel cushion layer are filled and grinded; after the dam body is filled by a certain elevation and stably settled, a flexible seepage preventing body on the surface layer is constructed; a metal net is placed on a dam surface; then, stones are laid in the metal net; flexible asphalt is filled in the surface layer; and the steps are repeated until the construction is finished. The method achieves a multi-layer seepage preventing effect; as the seepage preventing body on the surface layer is a flexible structure, the deformation of rock-fill materials of the dam body can be preferably adapted to, and meanwhile, the construction procedures of the seepage preventing body are simplified; and the method has the characteristics of simple structure, good in economical performance and convenience for construction.
Seepage preventing method and structure for upstream face surface layer of rock-fill dam
ZHANG HEZUO (author) / LUO GUANGQI (author) / CHENG RUILIN (author)
2016-02-03
Patent
Electronic Resource
English
IPC:
E02B
HYDRAULIC ENGINEERING
,
Wasserbau
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