Method for isolating solitary stone group on upper portion of shield tunnel through advance pipe shed

A shield tunnel and pipe shed technology, which is applied in tunnels, earthwork drilling, mining equipment, etc., can solve problems such as the subsidence or subsidence of boulder groups, prevent boulders from squeezing the shield, and reinforce the strata around the pipe shed , Reduce the effect of disturbance range and surface subsidence

Inactive Publication Date: 2017-08-04
CHINA RAILWAY LIUYUAN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above technical problems, the present invention provides a method for isolating the boulder group by an advanced pipe shed above the shield tunnel, which solves the problem of subsidence or subsidence of the boulder group above the shield tunnel, and enables the shield to pass through the boulder above the tunnel smoothly group, to ensure the smooth construction of the shield tunnel

Method used

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  • Method for isolating solitary stone group on upper portion of shield tunnel through advance pipe shed
  • Method for isolating solitary stone group on upper portion of shield tunnel through advance pipe shed
  • Method for isolating solitary stone group on upper portion of shield tunnel through advance pipe shed

Examples

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Effect test

Embodiment 1

[0032] Such as Figure 1-3 As shown, a method for isolating boulder groups with an advanced pipe shed above a shield tunnel is carried out in accordance with the following steps:

[0033] (1) The shield machine is shut down, and the advanced pipe shed hole 7 is constructed along the top of the tunnel excavation contour line 6 through the cutter head opening. The outer angle of the advanced pipe shed hole 7 does not invade the tunnel excavation contour line 6. The hole depth of 7 is less than or equal to 10m and exceeds 1m in front of the boulder 1. The diameter of the advanced pipe shed hole 7 is 80mm. The spacing is 0.5m, and the drilling sequence of the advanced pipe shed holes 7 is from high hole position to low hole position;

[0034] (2) Use quick-setting high-pressure concrete to inject grout into the advance pipe shed hole 7, and stop grouting until the advance pipe shed hole 7 flows;

[0035] (3) Repeat steps (1) and (2) until all 30° ranges on both sides of the tunn...

Embodiment 2

[0040] Such as Figure 1-3 As shown, a method for isolating boulder groups with an advanced pipe shed above a shield tunnel is carried out in accordance with the following steps:

[0041] (1) The shield machine is shut down, and the advanced pipe shed hole 7 is constructed along the top of the tunnel excavation contour line 6 through the cutter head opening. The outer angle of the advanced pipe shed hole 7 does not invade the tunnel excavation contour line 6. The hole depth of 7 is 5m and exceeds the position in front of the boulder 1 by 1.2m. The diameter of the advanced pipe shed hole 7 is 90mm. The center distance is 0.5m, and the drilling sequence of the advanced pipe shed hole 7 is from high hole position to low hole position;

[0042] (2) Use quick-setting high-pressure concrete to inject grouting into the hole 7 of the advanced pipe shed, and stop grouting until the hole of the advanced pipe shed is fluidized;

[0043] (3) Repeat steps (1) and (2) until all 60° ranges...

Embodiment 3

[0048] Such as Figure 1-3 As shown, a method for isolating boulder groups with an advanced pipe shed above a shield tunnel is carried out in accordance with the following steps:

[0049] (1) The shield machine is shut down, and the advanced pipe shed hole 7 is constructed along the top of the tunnel excavation contour line 6 through the cutter head opening. The outer angle of the advanced pipe shed hole 7 does not invade the tunnel excavation contour line 6. The hole depth of 7 is 10m and exceeds the position in front of the boulder 1 by 1.5m. The diameter of the advanced pipe shed hole 7 is 100mm. The center distance is 0.5m, and the drilling sequence of the advanced pipe shed hole 7 is from high hole position to low hole position;

[0050] (2) Use quick-setting high-pressure concrete to inject grout into the advance pipe shed hole 7, and stop grouting until the advance pipe shed hole 7 flows;

[0051] (3) Repeat steps (1) and (2) until all 60° ranges on both sides of the ...

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Abstract

The invention belongs to the technical field of shield tunneling, and in particular relates to a method for isolating boulder groups with an advanced pipe shed above the shield tunnel, which is characterized in that the following steps are followed: (1) The shield tunnel is shut down, and the tunnel is passed through the opening of the cutter head Excavate the advanced pipe shed hole above the contour line; (2) Use quick-setting high-pressure concrete to inject grout into the said advanced pipe shed hole, until the said advanced pipe shed hole is fluidized, stop grouting; (3 ) Repeat steps (1) and (2) until the 30°-90° range on both sides of the tunnel center is completed; (4) Form a concrete pipe shed above the tunnel with a range of 60°-180° from the center, and isolate Upper boulder group; (5) Shield excavation to safely pass through the tunnel section of the upper boulder group. Aiming at the boulder group above the shield tunnel, the invention forms a pipe shed through advanced grouting, which solves the problem of subsidence or subsidence of the boulder group in the soil above the shield tunnel, and enables the shield to smoothly pass through the boulder group above the tunnel.

Description

technical field [0001] The invention belongs to the technical field of shield tunneling, and in particular relates to a method for isolating boulder groups by an advanced pipe shed above the shield tunnel. Background technique [0002] With the development of modern urban buildings and transportation public facilities, the urban land resources are becoming more and more tense, and the ground transportation in the city can no longer meet the traffic requirements. In order to save urban land resources and alleviate the pressure of urban public transportation, it is imperative to expand the urban underground space. It is of great significance to build underground transportation facilities such as subways and urban underground highway tunnels. The shield tunnel construction method refers to the use of a shield machine to control the excavation surface and surrounding rock from collapse and instability while carrying out tunnel excavation and slag removal, and assembling segments...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D9/08
CPCE21D9/001E21D9/08
Inventor 徐韬周建军朱世友贺维国花书军郑旭
Owner CHINA RAILWAY LIUYUAN GRP CO LTD
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