Shield cutterhead edge rapid repair construction method based on high-abrasion stratum

Abstract

The invention belongs to the technical field of shield cutterhead edge repairing, and discloses a shield cutterhead edge rapid repairing construction method based on a high-abrasion stratum. The method comprises the steps of shutdown mileage setting; a working surface construction procedure; and a cutterhead edge repair procedure. According to the shield cutterhead edge rapid repairing construction method based on the high-abrasion stratum, a vertical shaft working face construction scheme of manual hole digging pile construction, small-radius steel casing split welding and well descending andsleeve valve pipe grouting reinforcement is adopted, and the construction safety and space requirements of the high-abrasion stratum are met; a multi-dimensional repairing type selection scheme is formulated according to the cutterhead abrasion conditions at different positions, on-site feeding is carried out, a multi-layer and multi-pass welding method is combined, a gas shielded welding processthe same as or similar to a gas shielded welding process in an original factory manufacturing process is selected, the welding quality is strictly controlled, and the repairing effect is guaranteed;and a working well is excavated in advance to be synchronous with shield tunneling, the next step of work can be linked after the shutdown mileage is reached, and the problem that the repairing construction period of the high-abrasion stratum is delayed due to measures of shutdown reinforcement, in-tunnel repairing auxiliary cavern expanding excavation, operation platform building and the like issolved.

Description

technical field [0001] The invention belongs to the technical field of repairing the edge of a shield machine cutter head, and in particular relates to a construction method for quickly repairing the edge of a shield machine cutter head based on a highly abrasive stratum. Background technique [0002] As one of the main components of the shield machine, the cutter head is generally designed to meet the requirements of deformation resistance. With the development of urban construction, the excavation of the shield machine in the sand and pebble layer containing boulders, the iron plate sand layer with high density and other unfavorable strata has caused the general wear and tear of the cutter head and the cutter. The area close to the edge of the cutter head is prone to high abrasion due to the long distance of the excavation line and the superimposed effects of uneven loads and groundwater impacts, resulting in a decrease in the excavation speed of the shield machine, or eve...

AI Technical Summary

Problems solved by technology

In order to ensure the stability of the excavation surface, there is currently no other safe method for restoration except using the conventional shaft method to go down the well. The conventional shaft method generally needs to be shut down in advance before excavation, and gradually does not meet the current planning and coordination requirements

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