Method for removing shell in double-shield TBM (tunnel boring machine) main engine hole

Abstract

The invention discloses a double-shield TBM (Tunnel Boring Machine) main engine in-tunnel shell abandoning and dismounting method which comprises the following steps: dismounting a main engine, reserving a shield shell as a primary support in the dismounting process, and after the main engine is dismounted, carrying out segment support on a tunnel section surrounded by the shield shell; no lifting point is arranged, no chamber expanding excavation is conducted, the integrity of the tunnel is guaranteed, the shield shell is reserved in the tunnel to serve as a primary support, the support cost is reduced, the construction period can be shortened, and the in-tunnel disassembly requirement that the tunnel end point does not have the receiving condition is met.

Description

technical field [0001] The invention relates to the technical field of disassembly of a double shield TBM, in particular to a method for disassembling a double shield TBM host by discarding a shell in a hole. Background technique [0002] It is well known that with the advancement of machinery manufacturing technology and the development of the tunnel industry, full-section hard rock tunnel boring machines (TBM) are widely used in the construction of deep and long tunnels. The double-shield TBM has the advantages of strong stratum adaptability, simultaneous tunneling and segment assembly, less interference to the station at the station, passing through the station, lifting, and turning around, and does not affect the construction period, etc. It is more and more used or Planning is applied in the construction of subway tunnels. Whether it is single-head or two-way excavation, the TBM needs to be disassembled after the excavation task is completed, so as to facilitate the sm...

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of the disassembly method in the above-mentioned technology is that it is necessary to expand and excavate a local chamber as the dismantling station for the cutter head, and at the same time, the tunnel needs to have enough space to meet the turning and transportation of large TBM parts. However, the excavation process of the double-shield TBM The segment assembly is carried out simultaneously. After the TBM is excavated to the end of the interval, except for the shield part, the segment has been laid in the rest of the tunnel body. The overall condition does not meet the conditions for expanding the excavation of the local chamber, and the double-shield TBM is different from the open TBM. , the double-shield TBM has a full-circle shield, and the size of the shield shell is almost the same as the size of the hair hole. After the shield shell is dismantled and turned over, it cannot be hoisted out along the original path of the tunnel where the segments have been laid.

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