A kind of advanced small conduit grouting structure and construction method thereof

Abstract

The invention relates to the technical field of tunnel construction, in particular to an advanced small pipe grouting structure and a construction method thereof. According to an advanced small pipe,quick closure of a primary support can be ensured, a grout stopping wall and the primary support form an integral stress structure and are tightly attached to a tunnel face, so that the stability of the tunnel face is increased, the safety risk of the tunnel face is greatly reduced, and soft rock tunnels and special geological tunnels excavated by blasting are facilitated; and the grouting structure is simple, the application of the grout stopping wall basically does not occupy the application time of the primary support, the grout stopping wall can be applied synchronously with the primary support, the construction speed is high, rapid grouting can be realized, a great deal of time is saved and the construction progress is speeded up compared with the set of the grout stopping wall alone,and grout stopping wall can be used as a part of the primary support without dismantling after the grouting of the advanced small pipe is finished. The advanced small pipe is factory processed, and has convenient and quick installation and grouting. The grout stopping wall is of an integral structure, has good grout stopping effect, can bear large grouting pressure, and greatly ensures the grouting effect of the advanced small pipe.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, and more specifically relates to an advanced small conduit grouting structure and a construction method thereof. Background technique [0002] In tunnel construction, advanced small conduits are widely used, especially in IV and V grade surrounding rock areas and some special geological areas. Compared with advanced support structures such as advanced pipe sheds in tunnels, they have simple construction, fast progress and low cost. specialty. At present, the disclosed technology in China shows that the grouting of the advanced small conduit is done after the completion of the advanced small conduit. This grouting method has the following disadvantages: [0003] 1. In order to achieve a better grouting effect during the grouting process of the advanced small conduit, the grouting time cannot be effectively controlled, and the sprayed concrete construction cannot be carried out during ...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the deficiencies in the prior art, the present invention provides an advanced small conduit grouting structure and its construction method, which solves the problems that the grouting time cannot be effectively controlled and the grouting effect is poor during the existing advanced small conduit grouting. Simultaneously carry out grouting of advanced small ducts and concrete spraying

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