Membrane bag grouting pipe structure and grouting lithification construction method in tunnel construction

Abstract

The invention provides a slip casting pipe structure of a tunnel construction membrane bag. The slip casting pipe structure comprises a port pipe having the side wall with a slip casting hole, a connecting pipe, an outer pipe, an inner pipe, a slurry-permeable non-water-permeable inner membrane and a water-permeable non-slurry-permeable outer membrane. The port pipe and the outer pipe are connected coaxially and detachably; and the connecting pipe is connected with one end of the inner pipe coaxially and detachably and the other end of the inner pipe extends into the inner cavity of the outerpipe through the port pipe. The outer pipe is formed by an outer pipe body and an outer pipe head; an outer pipe blowing hole is drilled in a specific pipe wall segment of the outer pipe body; and anouter membrane bag made of the outer membrane sleeves the tip and periphery of the opening end of the outer pipe head. The inner pipe includes an inner pipe head, an inner pipe end, and a telescopic inner pipe body that are connected successively; inner pipe blowing holes are drilled in the pipe walls of the inner pipe end and the inner pipe head; and an umbrella support is fixedly arranged at theouter wall of the connection end socket between the inner pipe end and the inner pipe head. In addition, the invention also provides a slip casting lithification construction method. Therefore, the support and water stop effects during the tunnel construction process are improved.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a membrane bag grouting pipe structure for tunnel construction and a grouting lithification construction method. Background technique [0002] During the construction of the tunnel, it is more and more frequent to encounter geological conditions that penetrate through the soil layer, sand layer and strong weathered layer. This kind of geological self-stability is poor, rich in water, the tunnel excavation is difficult, and the follow-up lining water leakage problem is frequent. However, the traditional grouting support and water-stop technology has a great impact on the construction of existing operations, and will cause certain damage to the existing support system, and the construction period is long, the amount of grout is uncontrollable, the construction cost is high, and it is harmful to the environment. Large pollution is a difficult problem for construction tec...

AI Technical Summary

Problems solved by technology

[0002] During the construction of the tunnel, it is more and more frequent to encounter the geological conditions that penetrate the soil layer, sand layer and strong weathered layer. This kind of geological self-stability is poor, rich in water, the tunnel excavation is difficult, and the follow-up lining seepage water problem is frequent. However, the traditional grouting support and water-stop technology has a great impact on the construction of existing operations, and will cause certain damage to the existing support system, and the construction period is long, the amount of grout is uncontrollable, the construction cost is high, and it is harmful to the environment. Heavy pollution is a difficult problem for construction technicians

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