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Construction method for dismounting sandwich linings of operating high-speed rail tunnels

A construction method and interlayer technology, applied in the construction field of dismantling and operating the interlayer lining of high-speed railway tunnels, can solve problems such as hindering the development of regional economy, increasing the burden on surrounding lines, affecting national travel, etc., to achieve fast and effective cutting, improve cutting efficiency, ensure safe effect

Active Publication Date: 2019-11-05
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the construction of high-speed railway tunnels, interlayer linings may be formed due to positioning errors of adjacent lining formwork. The interlayer linings in the tunnels will cause great safety hazards for high-speed railways during the operation period.
The existing solution is that the traffic operation and management department closes the tunnel, adopts measures to interrupt traffic and carry out tunnel construction, which affects the travel of citizens, increases the burden on surrounding lines, and hinders the development of the regional economy.

Method used

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  • Construction method for dismounting sandwich linings of operating high-speed rail tunnels
  • Construction method for dismounting sandwich linings of operating high-speed rail tunnels
  • Construction method for dismounting sandwich linings of operating high-speed rail tunnels

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Embodiment 1

[0037] see Figure 1 to Figure 4 , the invention provides a construction method for dismantling the interlayer lining of a high-speed rail tunnel in operation, which comprises the following steps in turn:

[0038] (S1): Determine the removal area of ​​the interlayer lining and erect a temporary protective frame under the interlayer lining to be removed; isolate the high-speed rail traffic passage and the reserved space for construction, and remove the interlayer lining without affecting the existing traffic operation . The temporary protective frame includes a steel frame, a protective plate arranged on the steel frame, and pulleys arranged at both ends of the steel frame, and the temporary protective frame should avoid the position of the circumferential slit when erected. The present invention adopts the movable temporary protective frame to isolate the traffic passage and the reserved space for construction. After the removal of the interlayer lining in one stage is comple...

Embodiment 2

[0046] The construction method for dismantling the interlayer lining of the high-speed railway tunnel in operation in this embodiment is basically the same as that of Embodiment 1, the difference is that in the step (S2), when the thickness of the interlayer lining is relatively large, it needs to be cut in stages, which includes the following steps in turn:

[0047] (s1): Use a cutting machine to cut and form two circumferential or longitudinal slits on the surface of the interlayer lining, and then chisel away the concrete between the two slits to form a cutting groove. The distance between the two slits is greater than the width of the cutting tool and the margin is not less than 2cm to ensure that the cutting machine has operating space in the groove formed by chiseling.

[0048] (s2): Use a cutting machine to perform a second cut in the cutting groove until the depth of the cut is the same as the thickness of the interlayer lining. The present invention adopts the step-by-s...

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Abstract

The invention discloses a construction method for dismounting sandwich linings of operating high-speed rail tunnels, and belongs to the field of tunnel lining construction. The method comprises the following steps of determining a dismounting area of a sandwich lining and erecting a temporary protection frame below a to-be-dismounted sandwich lining; constructing multiple groups of annular cuttingseams for the sandwich lining along circumference of a tunnel by utilizing a cutting machine, and constructing multiple groups of longitudinal cutting seams for the sandwich lining along the longitudinal direction of the tunnel; dismounting sand lining blocks obtained through cutting of the longitudinal cutting seam and the annular cutting seams in sequence, cleaning the lining surfaces of the newly exposed parts of the tunnel after the sandwich lining is eliminated, and fixing the temporary protection frame on the lining of the newly exposed part; and spraying a repair layer at the damaged part of the newly exposed lining of the tunnel and then dismounting the temporary protection frame. The method is capable of dismounting the sandwich linings without influencing the existing traffic circulation, and avoiding the lining surfaces from the phenomena such as slag drop and the like to influence the high-speed rail transportation, thereby ensuring the operation safety after the skylightis finished.

Description

technical field [0001] The invention relates to the field of tunnel lining construction, in particular to a construction method for removing the interlayer lining of an operating high-speed railway tunnel. Background technique [0002] With the continuous and rapid development of my country's economy, my country's high-speed rail transportation volume has increased dramatically. However, during the construction of high-speed railway tunnels, interlayer linings may be formed due to positioning errors of adjacent lining formworks. The interlayer linings in tunnels will cause great safety hazards for high-speed railways during the operation period. The existing solution is that the traffic operation and management department closes the tunnel and adopts measures to interrupt traffic and carry out tunnel construction, which will affect the travel of citizens, increase the burden on surrounding lines, and hinder the development of the regional economy. Therefore urgently need to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/00E21D11/12
CPCE21D11/003E21D11/12
Inventor 王立川龚伦王士杰樊永杰吴剑刘志强孙雪菲
Owner SOUTHWEST JIAOTONG UNIV
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