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Subway interval construction method for utilizing cantilever heading machine to downwards penetrate through pedestrian passageway

A cantilever roadheader, pedestrian passage technology, applied in tunnels, tunnel linings, underground chambers, etc., can solve the problems of increased construction costs, slow construction speed, construction difficulties, etc., to reduce deformation time, construction speed, and cutting effect. Good results

Inactive Publication Date: 2019-12-03
THE FIFTH ENG CO LTD OF CHINA TIESIJU CIVIL ENG GRP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For areas with high rock strength, traditional mechanical construction is relatively difficult, and the construction speed is slow, resulting in a long construction period. If a full-face tunnel boring machine is used, the construction cost will be greatly increased

Method used

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  • Subway interval construction method for utilizing cantilever heading machine to downwards penetrate through pedestrian passageway
  • Subway interval construction method for utilizing cantilever heading machine to downwards penetrate through pedestrian passageway
  • Subway interval construction method for utilizing cantilever heading machine to downwards penetrate through pedestrian passageway

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Embodiment Construction

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0027] A construction method for a subway section using a cantilever roadheader to pass under a pedestrian passage, specifically comprising the following steps:

[0028] (1), full-section curtain grouting: see figure 1 , the length of each cyclic grouting section is 30m, and a grout stop wall 1 is set at the face of each cyclic grouting section. The thickness is 2-2.1m, and it is made of C20 concrete. The end of each cycle grouting section is equipped with a ...

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Abstract

The invention discloses a subway interval construction method for utilizing a cantilever heading machine to downwards penetrate through a pedestrian passageway. The technologies of a cantilever heading machine, full cross section curtain grouting, advanced small pipe grouting and steel frame and reinforcing mesh fast splicing are utilized for performing construction; the cantilever heading machinecan be used for customizing different cutting teeth according to the hardness degree of surrounding rock, the tunnel face is intercepted and cut step by step according to an S-shaped intercepting andcutting path in the left and right circulation direction, the excavating and construction speed is high, and the construction progress is guaranteed; the effect of full cross section curtain groutinglies in water stopping and surrounding rock reinforcing, and the safety of construction is improved; the effect of advanced small pipe grouting lies in surrounding rock reinforcing, the self-bearingcapacity of the surrounding rock is improved, and surrounding rock deformation caused by tunnel construction is reduced; a steel frame and a reinforcing mesh are both prefabricated off-site; then an in-tunnel splicing or welding construction manner is adopted, the deformation time without supporting and protecting after surrounding rock excavation is shortened, so that surrounding rock deformationis controlled.

Description

technical field [0001] The invention relates to the field of tunnel construction, in particular to a construction method for a subway section using a cantilever boring machine to pass under a pedestrian passage. Background technique [0002] Karst landforms are developed in Southwest my country, especially in Guizhou and other places. The development of karst landforms is often accompanied by rich groundwater and many underground karst caves, that is, the strata are mostly water-rich karst strata, and tunnels in water-rich karst areas are affected by high water during construction. The impact of pressure-solution cavity is prone to disasters such as roof collapse, surface subsidence, surrounding rock deformation and even instability damage; when tunnels are built in water-rich karst strata, water and mud inrush are very likely to occur, which affects construction safety and structural safety, and easily causes tunnel damage. The collapse will affect the surrounding existing st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10E21D9/10E21D11/15
CPCE21D9/1006E21D11/105E21D11/152
Inventor 王群周三九张双张毅陈光辉王刚勇穆赵新
Owner THE FIFTH ENG CO LTD OF CHINA TIESIJU CIVIL ENG GRP
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