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Construction method for metro underground-excavation tunnel cross passage entering main track

A construction method and technology of horizontal passage, applied in tunnels, tunnel linings, underground chambers, etc., can solve the problems of complex stress transformation and affect construction safety, and achieve the effects of restraining surrounding rock deformation, convenient and rapid construction, and reasonable stress.

Inactive Publication Date: 2015-06-03
CHINA CONSTR FOURTH ENG DIV
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  • Claims
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Problems solved by technology

[0002] Underground excavation of subway mining method excavates the cross passage through the vertical shaft, and then excavates the main line tunnel in the cross passage that has been supported at the initial stage. Therefore, the cross passage faces multiple excavations, and the stress transformation is complicated, which affects the construction safety.

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  • Construction method for metro underground-excavation tunnel cross passage entering main track

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with accompanying drawing.

[0017] A construction method for entering the main line of a subway underground excavation tunnel cross passage, comprising the following steps in sequence:

[0018] ① Measure and set out the line, measure and release the excavation contour line of the main line door at the position of the main line door on the side wall of the transverse passage.

[0019] ②Install the grille steel frame at the position of the main line opening, and set up a small lead pipe in the inner arch of the grille steel frame.

[0020] ③ Arrange anchor pipes and double-layer steel mesh on the side wall outside the main line opening.

[0021] ④ Grout the advanced small conduit and anchor pipe, and weld them together with the double-layer steel mesh.

[0022] ⑤Shotcrete to form support walls.

[0023] figure 1 It is the cross passage support member formed after the above-mentioned construction met...

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Abstract

The invention discloses a construction method for a metro underground-excavation tunnel cross passage entering the main track and relates to the field of metro tunnel construction. The method includes sequential steps of 1, measuring and unwinding a line, namely arranging the main track portal position on the side wall of the cross passage; 2, installing a grid steel frame in the main track portal position, and arranging an advanced small guide tube in the arch of the grid steel frame; 3, arranging an anchor tube and a double-layered steel bar mesh on the side wall outside the main track portal; 4, injecting slurry into the advanced small guide tube and the anchor tube, and welding the advanced small guide tube and the anchor tube to the double-layered steel bar mesh integrally; 5, spraying concrete, and forming a supporting wall. Compared with the prior art, the method has the advantages that the existing mature construction manner can be utilized fully, and construction can be performed conveniently and rapidly.

Description

technical field [0001] The invention relates to the field of subway tunnel construction, in particular to a construction method for entering a main line of a subway underground excavation tunnel with a transverse passage. Background technique [0002] Underground excavation of subway mining method excavates the cross passage through the vertical shaft, and then excavates the main line tunnel in the cross passage that has been supported at the initial stage. Therefore, the cross passage faces multiple excavations, and the stress transformation is complicated, which affects the construction safety. Contents of the invention [0003] The object of the present invention is to provide a construction method for entering the main line of a subway underground tunnel cross passage, which can make full and reasonable use of existing mature construction methods and facilitate rapid construction. [0004] The technical scheme of the present invention is: a kind of construction method ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D11/10E21D20/02
CPCE21D9/00E21D11/105E21D20/02
Inventor 周帅唐勇
Owner CHINA CONSTR FOURTH ENG DIV