Method for repairing TBM (tunnel boring machine) cutter head in intra-tunnel high-pressure environment

Abstract

A method for repairing a TBM (tunnel boring machine) cutter head in intra-tunnel high-pressure environment includes: performing stratum strengthening (4) to a working face of a TBM tunneling accident site, establishing a repair operation space (4), and repairing a worn cutter head (2) immediately after establishment of the repair operation space. The pressure of the repair operation space is equal to that of the tunneling accident site. The pressure of the tunneling accident site is equal to given pressure of a TBM (1) during tunneling. The rear of the TBM and a circular mud layer form a barrier used for stopping outside air and underground river water from entering the front of the TBM. The operation space is used to repair the worn cutter head of the TBM. The method is of reference significance to repairing of various TBM cutter heads used for urban metro, railway, expressway and water conservancy facilities, and high social, economic and environmental benefits can be achieved.

Description

technical field [0001] The invention belongs to the technical field of shield machine repair, in particular to a repair method for a shield machine cutter head in a high-pressure environment in a tunnel. Background technique [0002] For the geological environment with deep mountains and wild ridges or no obstacles on the ground, the repair of the cutter head of the shield machine for tunnel construction can be excavated vertically from above the accident site, and a shaft larger than the diameter of the cutter head of the shield machine can be excavated. Not only does it take time to increase the construction cost, but also the construction surface is prone to collapse and cause the shaft to be re-excavated. After the repair, the shaft must be backfilled in time. This kind of repair difficulty and repair cost are self-evident. [0003] Or drive several rows of concrete piles downwards above the site where the cutter head of the shield machine is excavated. The number of con...

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Problems solved by technology

[0007] In order to solve the problem of repairing the cutter head of the shield machine due to the dense urban buildings and the impossibility of excavating vertical shafts or building the barrier wall on the river, the present invention provides a repair method for the cutter head of the shield machine under the high-pressure environment in the tunnel. This repair method solves the problem of repairing the worn part of the shield machine cutter head in the high-pressure environment in the tunnel, and can realize the repair of the shield machine cutter head in the high-pressure environment in the tunnel without affecting the surrounding environment such as ground traffic and buildings. The restoration work under the conditions has produced good social benefits, environmental benefits and economic benefits

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