Base rock uplift region shielding tool-changing in-situ reinforcement method

A technology of shield and bedrock, which is applied in the field of in-situ reinforcement of shield machine tool change in bedrock uplift areas, can solve the problems of inability to implement, unfeasible to open warehouses at atmospheric pressure, and large leakage of compressed air, so as to ensure effectiveness. , avoid the construction progress, prevent the effect of slurry leakage

Inactive Publication Date: 2015-11-04
CHINA RAILWAY SIXTH GROUP
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Problems solved by technology

[0004] In the bedrock uplift section of the shield excavation section, the lower part of the shield machine is high-strength bedrock, and the upper part is sand l

Method used

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  • Base rock uplift region shielding tool-changing in-situ reinforcement method
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  • Base rock uplift region shielding tool-changing in-situ reinforcement method

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Embodiment Construction

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] In order to solve the problem that in-situ soil reinforcement is difficult during shield tunnel construction in existing reclamation areas, the present invention provides an in-situ reinforcement method for shield tunneling tool change in bedrock uplift areas, which includes the following steps:

[0028] The first step: the construction of the micro pile isolation area, use the micro piles around the cutter head of the shield machine to form a rectangular isolation area, and the micro piles 2 in the rectangular isolation area are respectively located in front, rear, left and right sides of the shield machine cutter head 6, The micro-piles 2 in the front are 2-3 meters away from the shield machine cutterhead, the rear micro-piles 2 are 3-4 meters away from the shield machine cutterhead, and the micro-piles 2 on the left and right...

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Abstract

The invention discloses a base rock uplift region shielding tool-changing in-situ reinforcement method. The base rock uplift region shielding tool-changing in-situ reinforcement method comprises the steps that 1, micro-pile isolation region construction is performed, namely micro-piles are arranged around a cutter disc of a shield machine to form a rectangular isolation region, wherein the micro-piles of the rectangular isolation region are located in front and at back of the cutter disc of the shield machine and on the left side and the right side of the cutter disc of the shield machine respectively, the micro-piles located in front are 2 to 3 meters away from the cutter disc of the shield machine, the micro-piles located at the back are 3 to 4 meters away from the cutter disc of the shield machine, and the micro-piles located on the left side and the right side are 1.5 to 2 meters away from the cutter disc of the shield machine; 2, sleeve valve pipe grouting is conducted in the micro-pile isolation region. A curtain is formed around the cutter disc of the shield machine by adopting the micro-piles, the formed curtain is the rectangular isolation region formed by the micro-piles arranged around the cutter disc of the shield machine, and soil reinforcement is performed in the rectangular isolation region in the sleeve valve pipe grouting mode to effectively prevent the slurry leakage risk occurring in the grouting process, ensure effectiveness of grouting operation, avoid the influence on construction progress and reduce safety risk.

Description

technical field [0001] The invention relates to an in-situ soil reinforcement method in the process of shield tunneling in sea reclamation areas, in particular to an in-situ reinforcement method for shield tunneling tool change in bedrock uplift areas. Background technique [0002] In the shield construction of composite strata in reclamation areas, soil reinforcement is an important link in the construction, and it is also the focus of safety construction control. Especially in the process of shield excavation, the shield machine passes through the uplift section of the bedrock above the soft and hard strata, and the soft stratum must be reinforced, and the tool wear can pass through the uplift area of ​​the bedrock, so the shield machine's overall cutter is rolling A knife and a heavy duty hob are necessary. [0003] The shield machine is used to directly break the rock and pass through the uplift section of the bedrock, which has a relatively large wear and tear on the t...

Claims

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Application Information

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IPC IPC(8): E21D9/08E02D5/36E02D15/04E02D5/18
Inventor 陈训明周振华段晓鹏许满吉
Owner CHINA RAILWAY SIXTH GROUP
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