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Soil chamber medium replacement method for shield tunneling machine in freezing process

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

Active Publication Date: 2018-12-11
CHINA TUNNEL CONSTR GUANGDONG
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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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  • Soil chamber medium replacement method for shield tunneling machine in freezing process

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Embodiment Construction

[0022] refer to figure 1 , the invention is a medium replacement method for shield machine soil bins in the freezing process, comprising the following steps:

[0023] a. The shield machine is stopped, and the bentonite slurry 4 is injected into the soil bin 1, and the dregs and mud mixed slurry 3 in the soil bin 1 is discharged at the same time, so that the bentonite slurry 4 replaces the dregs and mud mixed slurry 3;

[0024] b. Freezing the external soil body 2, and monitoring the pressure change in the soil bin 1;

[0025] c. When the frozen intersecting circle on the cutter head 8 is initially formed, gas is introduced into the soil bin 1, and the bentonite slurry 4 in the soil bin 1 is discharged at the same time to realize gas replacement of the bentonite slurry 4.

[0026] In this freezing process, the medium replacement method of the shield machine soil bin is to first use the bentonite slurry 4 to replace the mixed slurry 3 of the muck mud in the soil bin 1, and then...

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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 invention relates to the technical field of shield machine opening and tool change, in particular to a medium replacement method for shield machine soil bins during the freezing process. Background technique [0002] The shield machine is a tunnel boring machine using the shield method. The basic working principle of the shield method is that a cylindrical steel component is pushed forward along the tunnel axis to excavate the soil. The shell of the cylindrical component That is, the shield, which acts as a temporary support for the excavated unlined tunnel section, bears the pressure of the surrounding soil layer, and sometimes bears the groundwater pressure and keeps the groundwater out. Under the cover of a shield. [0003] In the process of shield tunneling, when the cutter on the cutter head of the shield machine is worn or damaged to a certain extent, it is necessary to stop the machine for maintenance or replace the cutter. When constructi...

Claims

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Application Information

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Patent Type & Authority Applications(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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