Method of replacing shield tail brush of shield tunneling machine

Abstract

The invention discloses a method of replacing a shield tail brush of a shield tunneling machine; the method comprises the steps of I, setting circular bamboo reinforcement grouting holes, and performing grouting construction; II, replacing the shield tail brush; III, mounting a segment; IV, taking protective measures after the replacement of the shield tail brush. The method of the invention has the advantages that directional localized grouting can be performed according to field actual conditions; the method has low manufacture cost, high construction practicability, zero tunnel space taken by reinforcing equipment, short construction period and the like; little influence is caused to structural durability of the segment, and no adverse influence is caused to the structural stability of a shield tunnel; the method is highly worthy of popularization and application.

Description

technical field [0001] The invention relates to a replacement method of construction machine parts, in particular to a replacement method of a shield tail brush of a shield machine. Background technique [0002] At present, whether it is an earth pressure balance shield machine or a mud-water balance shield machine, they all operate in a closed environment, and the inside of the shield machine should be dry. However, due to various reasons, there will be different degrees of water seepage and mud seepage inside the shield machine, and the internal leakage of the shield machine is mainly concentrated at the tail of the shield. How to prevent and control shield tail leakage is another key issue in shield tunnel construction. Shield tail leakage is mainly caused by improper segment assembly, unfavorable backfill grouting, insufficient grease volume and pressure, and damage to the shield tail brush. [0003] Due to improper segment assembly and long-distance excavation of the ...

AI Technical Summary

Problems solved by technology

[0004] 1. Compared with the grouting method, the construction period is longer. The freezing method needs to use refrigeration equipment to prepare low-temperature cold medium. Active freezing generally takes 30 days, so the construction period is increased

[0005] 2. The freezing method needs to place freezing equipment in the shield tunnel, which takes up a lot of space and affects the follow-up construction of shield tail brush replacement

[0006] 3. The refrigeration process of freezing equipment consumes a lot of power, and the cost of strengthening by freezing method is high