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A medium replacement method for shield machine soil bin during freezing process

A technology of freezing process and shield machine, which is applied in the direction of earth drilling, mining equipment, tunnels, etc., and can solve problems such as consuming a lot of manpower, material resources and time, and safety accidents

Active Publication Date: 2021-03-16
CHINA TUNNEL CONSTR GUANGDONG
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The soil bin of the shield machine is behind the cutter head, and the soil bin is filled with the mixed slurry of dregs and mud cut during the excavation of the cutter head. When the freezing method is used to freeze the external soil body, the soil will also be frozen. The slurry in the warehouse needs to be cleaned and drained when the warehouse is opened. Due to the large volume of the soil warehouse, which can reach about 10 cubic meters, cleaning this part of the frozen soil will consume a lot of manpower, material resources and time. Landslides are likely to cause safety accidents

Method used

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  • A medium replacement method for shield machine soil bin during freezing process

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Embodiment Construction

[0022] Refer figure 1 The present invention is a refrigeration process During the shield structure soil medium replacement method, including the following steps:

[0023] A, the shield machine is stopped, and the bentonous soil liquid 4 is injected into the soil warehouse. At the same time, the slag mud mixed slurry in the soil warehouse is discharged, and the bentonous soil liquid 4 replaces the slag soil mixed slurry 3;

[0024] B. Frozen construction is performed on the external soil 2 and monitor the pressure change within the soil warehouse 1;

[0025] C. When the freezing circle on the cutter plate 8 is initially formed, the soil warehouse 1 is introduced into the gas while discharging the bentonous soil liquid in the soil warehouse 1, and the gas replacement bentonous soil liquid is achieved.

[0026] This frozen process is a medium replacement method of the shield structure, first using the bentonous soil liquid 4 to replace the slag mud mixed slurry in the soil warehouse,...

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Abstract

The invention discloses a soil chamber medium replacement method for a shield tunneling machine in a freezing process. Slag and soil mixed slurry in a soil chamber is replaced by bentonite slurry, then external soil is subjected to freeze construction, and the bentonite slurry in the soil chamber is replaced by air when a freeze circle on a cutter is formed preliminarily. Due to high fluidity andsensitivity in pressure transmission of bentonite slurry, thoroughness in air replacement can be guaranteed. After replacement is completed, only a small part of frozen soil needs to be cleared in chamber opening for cutter replacement, construction efficiency is greatly improved, labor saving is realized, and safety in construction is realized. The soil chamber medium replacement method is applied to the technical field of chamber opening for cutter replacement of the shield tunneling machine.

Description

Technical field [0001] The present invention relates to the field of shield machine opening binding tools, and more particularly to a displacement method for shield structure in a freezing process. Background technique [0002] The shield machine is a tunneling machine using a shield method. The basic working principle of the shield method is a cylindrical steel assembly that minuses the soil along the tunneling axis, the housing of the cylindrical assembly That is, the shield, it plays a temporary support of the excavated tunnel, withstanding the pressure of the surrounding soil layer, sometimes withstanding underground water pressure and putting the underground water, excavate, row soil, lining, etc. Under the cover of the shield. [0003] During the shield tray, the tool on the shield machine reaches a certain degree of wear or damage, it needs to be downturn or replace the tool. When the construction personnel need to be reinforced with the palm of the house, avoid major acci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/06E21D9/12
CPCE21D9/001E21D9/06E21D9/12
Inventor 易觉谭文陈钦东冯胜利朱劲锋陈俊山夏文韬刁志刚李学科罗福昌庄国清袁守谦
Owner CHINA TUNNEL CONSTR GUANGDONG
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