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A Construction Method for Excavation and Support of Existing Tunnels Underpassing Obliquely

A technology with existing tunnels and construction methods, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve problems such as tunnel structure damage, and achieve the effects of improving construction safety and saving work efficiency

Active Publication Date: 2022-02-22
RANKEN RAILWAY CONSTR GROUP
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Problems solved by technology

[0003] The object of the present invention is to provide a construction method for excavation and support of an existing tunnel that passes under an oblique intersection, which aims to solve the oblique section of the existing tunnel under construction and the existing tunnel in the prior art, and carry out excavation support. Technical Problems of Tunnel Structure Damage Caused by Protective Construction

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  • A Construction Method for Excavation and Support of Existing Tunnels Underpassing Obliquely

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Embodiment Construction

[0037] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples and accompanying drawings. As a limitation of the present invention.

[0038] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one of ordinary skill in the art that these specific details need not be employed to practice the present invention. In other instances, well-known structures, circuits, materials, or methods have not been described in detail in order to avoid obscuring the present invention.

[0039] Throughout this specification, reference to "one embodiment," "an embodiment," "an example," or "example" means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in the present...

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Abstract

The invention discloses a construction method for excavation and support of an existing tunnel that passes under an oblique intersection, which is applied to the oblique section generated between the tunnel under construction and the existing tunnel for excavation and support construction; Divide the oblique section generated by the tunnel under construction and the existing tunnel into excavation sections, and select one of the excavation sections as the test section, and gradually excavate the test section step by step. For excavation and support work, different construction methods can be adopted for each section in a more targeted manner to improve construction safety.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a construction method for excavating and supporting an existing tunnel that passes under an oblique intersection. Background technique [0002] The operating tunnel lines of urban subways are generally distributed in a network shape, and there are inevitably cases where lines cross each other. During the construction of new subway lines, a large number of proposed tunnels pass through existing operating tunnels. The excavation construction of the underpass tunnel has a significant disturbance effect on the existing operating tunnel, which often leads to problems such as settlement of the existing operating tunnel, deformation and cracking of the lining structure, and emptying of the ballast bed, especially when the proposed tunnel passes obliquely downward with a very small clear distance. When there is an operating tunnel, it will cause obvious torsion effect of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/14E21F17/00E21D11/10E21D11/15
CPCE21D9/14E21F17/00E21D11/10E21D11/152
Inventor 廖建东殷洪亮孙超文康名李海锐
Owner RANKEN RAILWAY CONSTR GROUP
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