Open type TBM plane sliding stepping device and method

Abstract

The invention discloses an open type TBM plane sliding stepping device and method. The device comprises a base board, lifting mechanisms and a rear support used for supporting a saddle and supporting boots of a TBM. The lifting mechanisms are arranged on the two sides of the front portion of the base board. The rear support is connected to the rear portion of the base board through a pull rod. The two ends of the pull rod are hinged to the base board and the rear support respectively. A sliding board used for supporting the front portion of the TBM is arranged on the base board. A pushing hydraulic cylinder is arranged behind the sliding board and the other end of the pushing hydraulic cylinder is hinged to a lug board on the base board. Upper supporting boards of the lifting mechanisms are connected with a left shield and a right shield of the TBM. According to the method, the friction difference principle that intermetallic contact friction between the sliding board and the base board is small and friction between the base board and a concrete bottom board is large is used, the sliding board and the TBM are jointly pushed by the pushing hydraulic cylinder to slide forwards along the base board, forward movement is achieved through multiple stepping pushing circulations, a pushing bearing reaction device does not need to be independently arranged, bearing reaction supplied through welding is not needed, the structure is simple, and cost is low.

Description

technical field [0001] The invention relates to the technical field of design and construction of a full-face rock tunnel boring machine (TBM), in particular to a stepping device and a stepping method for enabling an open TBM to reliably and quickly reach the starting tunnel face after being assembled and debugged. Background technique [0002] After the TBM is assembled, it is necessary to step forward to the starting face to start excavation. In addition, after the previous section of the tunnel is excavated and penetrated, it is also necessary to step and transfer to the next tunnel section for excavation. This requires a stepping device to realize. In the past, a rolling stepping device was adopted. For large-diameter TBMs, due to the heavy weight, the limited rolling track is difficult to support and realize stepping, and the structure is complicated, difficult to install, and high in cost. Another step-by-step method in the past is that the step-in tunnel section needs...

AI Technical Summary

Problems solved by technology

A rolling stepping device used in the past, for large diameter TBMs, due to the heavy weight, the limited rolling track is difficult to support and realize stepping, and the structure is complex, difficult to install, and high cost

Another step-by-step method in the past is that the step-in tunnel section needs to be excavated and poured with concrete to form an arc-shaped floor, and the TBM pushes and slides on the arc-shaped floor. This method requires a large amount of excavation and backfill, high cost, and long construction period

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