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A method for dismantling an inverted arch

A technology of arch surface and blast hole, applied in the field of inverted arch demolition, can solve the problems of increasing construction cost and slowing down construction progress, and achieve the effect of speeding up construction progress, reducing demolition cost and reconstruction cost

Active Publication Date: 2021-07-20
CHINA RAILWAY 23RD CONSTR BUREAU LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the prior art removes the secondary lining and the inverted arch together, and then rebuilds the inverted arch and the secondary lining with higher strength, which will increase the construction cost and slow down the construction progress , providing a method for dismantling an inverted arch

Method used

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  • A method for dismantling an inverted arch
  • A method for dismantling an inverted arch
  • A method for dismantling an inverted arch

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Embodiment 1

[0031] Such as Figure 1-Figure 3 Shown, a kind of inverted arch removal method comprises the following steps:

[0032] Step 1: Level the surface of the inverted arch 1 to be removed.

[0033] Step 2: a plurality of first blastholes 31 are arranged perpendicular to the inverted arch surface 11, and the first blastholes 31 are arranged along the transverse direction of the tunnel and the longitudinal direction of the tunnel to form 12 arrays of first blastholes arranged longitudinally along the tunnel. The depth of the first blasthole 31 is 10-20cm greater than the depth of the inverted arch 1, and the detonator 5 is arranged in the first blasthole 31;

[0034] A plurality of hollow holes 4 are arranged perpendicular to the inverted arch surface 11, and the plurality of hollow holes 4 are arranged longitudinally along the tunnel to form a hollow hole arrangement, and the hollow hole arrangement is arranged on the longitudinal axis of the tunnel;

[0035] A plurality of second...

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Abstract

The present invention relates to the technical field of tunnel construction, in particular to a method for dismantling an inverted arch, comprising the following steps: Step 1: setting a plurality of first blastholes perpendicular to the surface of the inverted arch, and the first blastholes are arranged along the transverse direction of the tunnel and the longitudinal direction of the tunnel Arrangement, setting a detonator in the first blast hole; step 2: detonate the detonator in batches and then remove the inverted arch, and the mileage of the inverted arch removed by each detonation is less than one-third of the total mileage of the secondary lining in the demolition area. In the present invention, the inverted arch mileage of each detonation demolition is designed to be less than one-third of the total mileage of the secondary lining in the demolition area, so that the structure of the secondary lining will not be damaged during each detonation demolition, thereby eliminating the need for further The rebuilding of the secondary lining reduces the cost of demolition and reconstruction, and speeds up the construction progress.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a method for removing an inverted arch. Background technique [0002] The inverted arch is a reverse arched structure set at the bottom of the tunnel to improve the stress conditions of the upper support structure. It is one of the main components of the tunnel structure. Underground, but also effectively resist the reaction force from the strata below the tunnel. [0003] However, in special cases, due to the excessive stress on the inverted arch or other reasons, after a period of time when the concrete is poured, the inverted arch will float and deform, or even be damaged and cracked, so the inverted arch needs to be removed for replacement. However, since the secondary lining forms an integral body with the inverted arch after solidification, the structure of the secondary lining is easily damaged when the inverted arch is removed by the traditional method. There...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F17/00E21D11/00F42D1/00F42D3/00
CPCE21D11/00E21F17/00F42D1/00F42D3/00
Inventor 史羽明尹智勇奚成陈文萍刘咏梅李松熊志刚张彪周琪马敏刘陈坤
Owner CHINA RAILWAY 23RD CONSTR BUREAU LTD
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