Method for preventing large-section rectangular pipe-jacking tunnel from generating soil loading phenomenon

A technology of rectangular pipe jacking and large cross-section, applied in tunnels, earth-moving drilling, mining equipment, etc., can solve problems such as the inability to eliminate back soil phenomenon, and achieve the effect of avoiding back soil phenomenon, uplift or subsidence

Inactive Publication Date: 2016-04-13
CHINA RAILWAY TUNNEL SURVEY & DESIGN INST
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Problems solved by technology

[0004] The present invention provides a method for preventing the back-soil phenomenon in a large-section rectangular pipe-jacking tunnel, so as to solve the problem that the back-soil phenomenon cannot be eliminated in the above-mentioned background technology

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  • Method for preventing large-section rectangular pipe-jacking tunnel from generating soil loading phenomenon
  • Method for preventing large-section rectangular pipe-jacking tunnel from generating soil loading phenomenon

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Embodiment Construction

[0022] The following is an optional embodiment of the present invention, which can be modified and polished by those skilled in the art without changing the spirit and content of the present invention. The present invention will be further described below in conjunction with accompanying drawing:

[0023] A method for preventing a large-section rectangular pipe-jacking tunnel from producing back-soil phenomenon, comprising the following steps in sequence:

[0024] The first step is to implement the working well of the pipe jacking tunnel;

[0025] The second step is to theoretically locate the profile of the pipe-jacking tunnel on the side wall of the working shaft adjacent to the tunnel;

[0026] The third step is to apply an isolation layer above the outline of the pipe jacking tunnel;

[0027] The fourth step is to make the tunnel door;

[0028] The fifth step is to hoist the pipe joint in place;

[0029] The sixth step is jacking construction.

[0030] Before the jack...

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Abstract

The present invention belongs to the field of underground engineering non-excavation construction, and especially relates to a method for preventing a large-section rectangular pipe-jacking tunnel from generating the soil loading phenomenon. The method comprises the steps of: (1) constructing a pipe-jacking tunnel working well; (2) performing theory positioning of the pipe-jacking tunnel profile on a well wall of the working well adjacent to the tunnel side; (3) constructing an isolation layer over the pipe-jacking tunnel profile; (4) constructing a tunnel portal; (5) hoisting a pipe joint in position; and (6) performing jacking construction. When the jacking construction is performed, soil at an upper portion can be effectively protected due to the effect of the isolation layer, soil movement along with jacking of a pipe-jacking machine and the pipe-jacking pipe joint can be prevented, so that the soil loading phenomenon can be avoided.

Description

technical field [0001] The invention belongs to the field of non-excavation construction of underground engineering, and in particular relates to a method for preventing back-soil phenomenon in a large-section rectangular pipe-jacking tunnel. Background technique [0002] Rectangular pipe-jacking tunnels are mainly used in projects such as subway entrances and exits, municipal crossing passages, pedestrian passages in underground commercial streets, and municipal tunnels. Due to the friction between the head of the pipe jacking machine and the joint of the pipe jacking machine and the surrounding soil, and the frictional contact surface is large, during the construction process of pipe jacking, the head of the pipe jacking machine and the joint of the pipe jacking machine are too large. The friction force drives the soil above it to move forward, causing the back soil phenomenon, causing serious disturbance of the soil above the pipe jacking tunnel, causing uplift or subside...

Claims

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Application Information

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IPC IPC(8): E21D9/00E21D9/14
Inventor 张俊岱宋仪吕剑英黄伟朱勇士张总纲倪伟伟张彦岭程鹏
Owner CHINA RAILWAY TUNNEL SURVEY & DESIGN INST
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