Advanced supporting structure spliced by adopting corrugated steel pipe sheets and advanced supporting method

Abstract

The invention relates to an advanced supporting structure spliced by adopting corrugated steel pipe sheets and an advanced supporting method. According to the structure and the method, the stability of an excavation working surface of the tunnel project can be guaranteed. The structure comprises a plurality of corrugated steel splicing modules and grout, wherein the corrugated steel splicing modules are mutually overlapped and fixed in the longitudinal direction of a tunnel, and the grout is used for filling the spaces between the corrugated steel splicing modules and a tunnel surrounding rockthrough injection; and each corrugated steel splicing module is composed of a plurality of corrugated steel pipe sheets, wherein the corrugated steel pipe sheets are assembled and formed by clampingin the circumferential direction through annular joints and fixedly connecting in the longitudinal direction through longitudinal joints. Compared with the prior art, the structure and the method havethe advantages that modular splicing is adopted, the construction efficiency is high, the structural strength is high, the structure can be used as an initial supporting structure, and intelligence,automatic construction and the like are facilitated.

Description

technical field [0001] The invention relates to the field of advance support for tunnels, in particular to an advance support structure and support method assembled by corrugated steel pipe sheets. Background technique [0002] In the geological environment with weak surrounding rocks, tunnels are prone to instability and collapse. Therefore, it is necessary to do advance support based on the tunnel excavation contour line before construction. The method of advance support can improve the surrounding rock It plays the role of strengthening the surrounding rock, thereby controlling the convergence deformation of the tunnel and the disturbance to the surrounding environment. Advance support has become a key measure for tunnels passing through weak and broken surrounding rock, and its design is particularly important. [0003] At present, the advanced support methods commonly used in tunnels mainly include pipe shed method, advanced small conduit grouting, and advanced anchor ...

AI Technical Summary

Problems solved by technology

Among them, the construction of the pipe shed method must have a sufficient number of rod structures that can diffuse or transmit the surrounding rock pressure to form a "shelf", that is, a sufficient number of steel pipes need to be driven in, and generally used at the entrance of the cave; The drilling angle of small conduits and anchors needs to be strictly controlled under the condition that the number of anchors is sufficient, and the construction is more complicated

None of the three can realize assembly construction, and the construction efficiency is low and the cycle is long

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