Foundation ditch drainage type sprayed concrete structure and construction method thereof

Abstract

The invention discloses a foundation ditch drainage type sprayed concrete structure and a construction method thereof. The foundation ditch drainage type sprayed concrete structure comprises geotechnical cloth, a drain board, a reinforcing mesh and a concrete layer, wherein the geotechnical cloth is fixed to the surface of a foundation ditch surrounding rock-soil body through a first fixed piece; the drain board is fixed to the surface of the geotechnical cloth through a second fixed piece; the reinforcing mesh is connected with the second fixed piece in a binding way through a binding piece so as to be fixed to the surface of the drain board; and the concrete layer is formed through spraying concrete onto the reinforcing mesh. Through the corresponding fixed pieces, the geotechnical cloth and the drain board are fixed to the surface of the foundation ditch surrounding rock reserved with fracture water, then a hanging net is sprayed for protection, various parts are conveniently installed and disassembled, and the structure is high in whole firmness degree and good in waterproof effect, so that the quality of sprayed concrete can be improved, and the cost is reduced.

Description

technical field [0001] The invention relates to the field of geotechnical engineering, in particular to a foundation pit drainage type shotcrete structure and a construction method thereof. Background technique [0002] In foundation pits, tunnels and other underground projects, after the excavation of the foundation pit, the bedrock fissure water develops on the surface of the foundation pit or the face of the tunnel face, resulting in the presence of bedrock fissure water between the surrounding protection piles. Slurry reinforcement is used to prevent water seepage, but this method is expensive and has a long construction period. As an improvement, water seepage can be prevented by spraying concrete to form a concrete layer. However, in the case of large-scale water seepage, sprayed concrete will make the concrete unable to reach the initial setting state under the action of water flow, resulting in poor quality of shotcrete and further damage to surrounding rocks. The e...

AI Technical Summary

Problems solved by technology

[0002] In foundation pits, tunnels and other underground projects, after the excavation of the foundation pit, the bedrock fissure water develops on the surface of the foundation pit or the face of the tunnel face, resulting in the presence of bedrock fissure water between the surrounding protection piles. slurry reinforcement to prevent water seepage, but this method is expensive and has a long construction period

As an improvement, water seepage can be prevented by spraying concrete to form a concrete layer. However, in the case of large-scale water seepage, sprayed concrete will make the concrete unable to reach the initial setting state under the action of water flow, resulting in poor quality of shotcrete and further damage to surrounding rocks. Excessive exposure time, which poses a security risk

At the same time, due to the occurrence of water seepage, the concrete will be lost and fall off when spraying concrete, resulting in waste of concrete materials and increased construction costs

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