Construction method of wear and tear repair in shield cutter head tunnel

Abstract

The invention discloses a shied cutter head abrasion repairing construction method in a tunnel. The method comprises the steps that first, cutter head repairing working space in the tunnel is digged; second, cutter head outer edge abrasion is repaired in the tunnel, specifically, 201, outer edge big ring abrasion is repaired, 202, notch ring abrasion is repaired, and 203, inclined-plane folded plate abrasion is repaired; and third, cutter head panel abrasion is repaired in the tunnel, specifically, 301, big scraper tool apron abrasion is repaired, 302, outer ring small scraper tool apron abrasion is repaired, and 303, abrasion of a hob knife box weld seam is repaired. The design is novel, cutter head abrasion repairing in the tunnel is conducted utilizing steadiness of a tunnel face in a whole fracture surface hard rock position, ground well opening is avoided, cost is saved, meanwhile, a scraper tool apron which is prefabricated and designed with a positioning through hole is adopted to cover welding construction, the situation that location is difficult when an original heavy scraper tool apron is mounted is avoided, so that cost is saved, the construction period is shortened, and replacing of the scraper tool apron in small space is convenient and feasible.

Description

technical field [0001] The invention belongs to the technical field of repairing shield cutterheads, and in particular relates to a construction method for repairing wear and tear in tunnels of shield cutterheads. Background technique [0002] The shield machine is mostly used for underground tunnel construction. During the construction process, the tunnel geology is complex and most of them are composite strata, that is, full-section soft rock, upper soft rock and lower hard rock, and full-section hard rock alternately appear. It is used as a key component of the shield machine during the excavation process. One of the cutterheads plays the role of excavating the ground, supporting the tunnel face, and mixing the slag. Its working conditions are extremely harsh and the stress is complicated. It is the main part of the inspection and maintenance of the shield machine. The quality of the cutterhead will directly affect Whether the shield construction can be carried out smooth...

AI Technical Summary

Problems solved by technology

For the stratum with a high coverage rate of surface houses and mostly old earth-brick houses without foundation, in order to control the settlement of the ground houses in the composite stratum, a full warehouse high-pressure excavation mode is adopted, which will cause the shield machine to be under large pressure for a long time. Under the harsh working conditions of thrust, large torque, and partial load, the outer edge of the cutter head is severely worn, and the cutter head of the shield machine needs to be repaired in time. The existing shield machine cutter head repairs mostly use the method of digging a well on the ground to repair the shield machine. Repairing the machine cutter head, the construction cost is high, the process is complicated, and the construction period is seriously affected; in addition, the existing replacement tool holders are mostly replaced by conventional replacement, the space in the tunnel is small, the tool holders are heavy, and the replacement is inconvenient, which brings inconvenience to the construction. Unnecessary troubles were caused, which seriously affected the construction period

Images