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The construction method of the cross passage entering the main line and the cross passage

A construction method and cross-channel technology, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve problems such as complex stress transformation and impact on construction safety, and achieve the goals of improving self-stabilization, suppressing deformation of surrounding rock, and facilitating and rapid construction Effect

Inactive Publication Date: 2017-04-12
CHINA CONSTR FOURTH ENG DIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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.

Method used

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  • The construction method of the cross passage entering the main line and the cross passage
  • The construction method of the cross passage entering the main line and the cross passage
  • The construction method of the cross passage entering the main line and the cross passage

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A construction method for entering the main line of a subway underground excavation tunnel cross passage, comprising the following steps in sequence:

[0037] 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.

[0038] 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.

[0039] ③ Arrange anchor pipes and double-layer steel mesh on the side wall outside the main line opening.

[0040] ④ Grout the advanced small conduit and anchor pipe, and weld them together with the double-layer steel mesh.

[0041] ⑤Shotcrete to form support walls.

Embodiment 2

[0043] figure 1 It is the cross passage supporting member formed after the above-mentioned construction method is constructed. The cross passage supporting member consists of an initial support structure 101 for the portal of the upper transverse passage, an initial support structure 102 for the portal of the lower transverse passage, a shaped steel frame 103 for the rear upper portal, Front upper portal steel frame 104, rear cross passage primary support structure 17, front cross passage primary support structure 18, rear support wall 19, front support wall 110, rear lower portal steel frame 105 and front lower portal Sectional steel frame 16 forms.

[0044] The rear support wall 19 is connected with the initial support structure 17 of the rear transverse passage, the front support wall 110 is connected with the initial support structure 18 of the front transverse passage, the initial support structure 101 of the portal of the upper transverse passage and the preliminary supp...

Embodiment 3

[0049] Figure 2-4 It is the cross passage member without concrete injection in the method of Example 1, including the cross passage door, the main line of the tunnel cross passage, the grouting anchor pipe 1, the grid steel frame sleeve arch 3, the initial support structure of the cross passage 4, the double-layer Reinforcement mesh 2, door-shaped steel frame 6, grouting conduit 7, tunnel primary support structure 8, tunnel second lining 9 and main line leading small conduit 10.

[0050] The grouting conduit 7 is set at the door of the cross passage, the grid steel frame arch 3 is installed at the main line entrance of the tunnel cross passage, and the main line leading small conduit 10 is arranged at the inner arch of the grid steel frame sleeve arch 3. The slurry conduit 7 is above the grid steel frame cover arch 3, and the portal steel frame 6 is adjacent to the grid steel frame cover arch 3. The double-layer reinforcement mesh 2 and the grouting anchor pipe 1 are arrange...

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PUM

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Abstract

The invention discloses a main track entering construction method for a cross aisle and the cross aisle, and relates to the field of the subway tunnel construction. The method comprises the following steps: step one, surveying and lining are carried out, and a main track tunnel portal position is arranged on the side wall of the cross aisle; step two, a grid steel frame is arranged on the main track tunnel portal position, and advanced small pipes are punched in an internal arch part of the grid steel frame; step three, anchor pipes and double-layer reinforcing meshes are arranged on the side wall outside a main track tunnel portal; step four, the advanced small pipes and the anchor pipes are subjected to grouting, and the grouted the advanced small pipes and the anchor pipes are welded with double-layer reinforcing mesh sheets as a whole; step five, concrete is sprayed to form a supporting wall. Compared with the prior art, the main track entering construction method for cross aisle fully and reasonably utilizes an existing mature construction method, so that the construction is convenient and fast.

Description

technical field [0001] The invention relates to the field of subway tunnel construction, in particular to a construction method for a cross passage entering a main line, a cross passage support member and a cross 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] One of the objectives of the present invention is to provide a construction method for cross passages entering the main line, which can make full and reasonable use of existing mature construction methods and facilitate rapid construction. [0004] The technical solution is: a construction method for cross passages entering the main line, which c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/00E21D11/10E21D11/14E21D20/02
CPCE21D9/00E21D9/001E21D11/10E21D11/14E21D20/02
Inventor 周帅唐勇
Owner CHINA CONSTR FOURTH ENG DIV