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Construction method of long-span and super-thick tunnel second lining structure

A construction method and large-span technology, applied in the direction of tunnel lining, tunnel, shaft lining, etc., can solve problems such as unstable support, high construction risk, and difficult construction, so as to solve construction difficulties, speed up construction schedule, and save costs Effect

Active Publication Date: 2019-06-07
CHINA CONSTR EIGHT ENG DIV CORP LTD
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  • Description
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of the prior art, to provide a construction method for a large-span and ultra-thick tunnel secondary lining structure, and to solve the problem of unstable support in the existing trolley formwork and one-time pouring secondary lining structure construction method , construction difficulty and high construction risk

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  • Construction method of long-span and super-thick tunnel second lining structure
  • Construction method of long-span and super-thick tunnel second lining structure
  • Construction method of long-span and super-thick tunnel second lining structure

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Embodiment Construction

[0060] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0061] refer to figure 1 , the present invention provides a construction method for a large-span and ultra-thick tunnel secondary lining structure, which is suitable for the construction of a large cavern secondary lining structure that cannot use trolleys. Thick means that the thickness is greater than or equal to 5m. The main purpose of the invention is to improve the safety in the construction process, ensure construction safety, and solve the difficult problem of large-span ultra-thick secondary lining construction safely and conveniently. The invention overcomes the difficulty and high risk of integral pouring of the second lining in the construction process of the large cavern of the tunnel, and also abandons the bulky large steel pipe support method, strengthens the monitoring and measurement of the frame body process, and solves the pr...

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Abstract

The invention relates to a construction method of a long-span and super-thick tunnel second lining structure. The construction method comprises the following steps that a tunnel second lining structure to be constructed is divided into a first subsection, a second subsection and a third subsection; the first subsection is constructed, a supporting system is arranged on an inverted arch of a tunnelto support first formworks, and pouring is carried out to form a first side wall structure; the second subsection is constructed, the supporting system is heightened to support second formworks, andpouring is carried out to form a second side wall structure connected with the first side wall structure; and the third subsection is constructed, a top bracing system is arranged on the inverted archof the tunnel, the top bracing system is connected with the second side wall structure in a top-bracing mode, third formworks are supported by the top bracing system, and pouring is carried out to form a top arch structure connected with the second side wall structure, so that the construction of the tunnel second lining structure is completed. According to the construction method of the long-span and super-thick tunnel second lining structure, step-by-step flow process and different formwork supporting systems are adopted, the problem of large difficulty and high dangerousness of the whole construction of the large-span and super-thick secondary lining structure is solved, and the construction schedule is speeded up.

Description

technical field [0001] The invention relates to the field of tunnel construction engineering, in particular to a construction method for a large-span and super-thick tunnel secondary lining structure. Background technique [0002] With the continuous construction of tunnel engineering, more and more tunnel functions are required by complex geology and special functions, the excavation chamber is getting larger and larger, and the construction conditions and environment are becoming more and more complex. The construction safety of the thick secondary lining structure will be something we have to consider and pay attention to. Combined with the actual situation of the project, such as the punishment circle of Jilin Beishan Four Seasons Cross-country Ski Resort Project, the location of the penalty circle is 32m, the large span is 5m, and the ultra-thick secondary lining construction is guaranteed. The safety and simplicity in the construction process of the second lining with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10
Inventor 阮鹏飞宋波孙加齐陈学光张保国
Owner CHINA CONSTR EIGHT ENG DIV CORP LTD
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