Method of replacing shield tail brush of shield tunneling machine

A replacement method and shield tail brush technology, which is applied in earthwork drilling, wellbore lining, tunnel lining, etc., can solve the problems of large space occupied by freezing equipment, influence on the subsequent construction of shield tail brush, and large power consumption in the refrigeration process. Large promotion and application value, convenient construction quality control, and short construction period

Inactive Publication Date: 2017-11-24
WUYI UNIV
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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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] The method for replacing the shield tail brush of the shield machine provided by the present invention is as follows:

[0034] Step 1. Annular bamboo reinforcement grouting hole layout and grouting construction:

[0035] With the help of annular grouting hole construction equipment, 1-2 annular bamboo tendon grouting anchors are buried at the predetermined position of the outer soil body of the segment for replacing the shield tail brush. The outer soil body is generally arranged in one row, and two rows can be arranged when the water sealing requirement is high. The grouting material is ordinary cement single slurry combined with ordinary cement-water glass double slurry, and the slurry ratio is ordinary cement single slurry W : C=0.6-0.8:1; Ordinary cement-sodium silicate double slurry W:C=1:1, C:S=1:1; Grouting pressure 2-3MPa; The opening is in accordance with the design position, and the deviation is controlled within ± 10cm; when the formation is weak and it is d...

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PUM

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/06E21D11/10E21D20/02E21D11/08
CPCE21D9/06E21D11/08E21D11/10E21D20/021
Inventor 曾晖胡俊陈青生姚柳邓璇
Owner WUYI UNIV
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