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Reinforcing structure suitable for dual-arch tunnel mid-partition and construction method

A technology of strengthening structure and double-connected arches, applied in tunnels, tunnel linings, earthwork drilling, etc., can solve the problems of large excavation section, affecting construction efficiency, uneven control requirements, etc., to improve the ability to disperse stress, ensure Construction and operation safety, the effect of improving anti-distortion ability

Active Publication Date: 2019-10-29
SHANDONG UNIV +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Therefore, it is necessary to strengthen the partition wall to improve the stability of the partition wall. Due to the special structural form of the partition wall and the narrow construction space of the double-arch tunnel, the common foundation reinforcement method at this stage is It is not applicable to the construction of the partition wall in multi-arch tunnels, and cannot meet the control requirements of the partition wall for uneven settlement
[0003] In addition, the excavation section of the double-arch tunnel is often large, and the excavation in parts produces multiple disturbances to the double-arch, making its stress state in a dynamic change, and the bias caused by the construction process will affect the stability of the partition wall. In severe cases, it will cause deflection, cracking and uneven settlement of the partition wall, seriously affecting the construction safety of the double-arch tunnel
The inventor found that the commonly used reinforcement form at this stage is to add steel frames or supports on both sides of the partition wall according to the span of the pilot tunnel to temporarily reinforce the partition wall, and then remove the steel frames or supports after the construction is completed. The method is time-consuming and labor-intensive, occupies construction space, seriously affects construction efficiency, and cannot guarantee the stability of the partition wall in the operation phase of the double-arch tunnel after demolition

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  • Reinforcing structure suitable for dual-arch tunnel mid-partition and construction method
  • Reinforcing structure suitable for dual-arch tunnel mid-partition and construction method
  • Reinforcing structure suitable for dual-arch tunnel mid-partition and construction method

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0033] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0034] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinatio...

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Abstract

The invention discloses a reinforcing structure suitable for a dual-arch tunnel mid-partition and a construction method. The reinforcing structure comprises at least four steel web plates, the multiple steel web plates are sequentially welded to form the star-flower-shaped section manner, the embedding capacity of the reinforcing structure and the mid-partition can be greatly improved, the contactarea of the reinforcing structure and a rock-soil body is greatly increased, and the structure whole distortion-resisting capacity is improved. Grouting steel floral tubes are arranged on the two sides of each steel web plate, compaction between the reinforcing structure and the rock-soil body can be improved through pressure grouting, side friction resistance is greatly increased, and the unevendeposition of the mid-partition can be controlled. The two sides of each steel web plate are provided with steel ribs and a vibrating wire type earth pressure box, the steel ribs achieve the effect of improving the side friction resistance, improving the local stability and the antitorque capacity of the steel web plates and the protecting the earth pressure box, the vibrating wire type earth pressure box above the steel ribs can achieve real-time monitoring of stress of the reinforcing structure, in combination with conventional monitoring and measuring of the mid-partition, and the stable state of the mid-partition can be more comprehensively mastered.

Description

technical field [0001] The invention relates to the technical field of multi-arch tunnel construction, in particular to a reinforcement structure and a construction method suitable for a partition wall in a double-arch tunnel. Background technique [0002] Due to its space-saving, smooth line, beautiful appearance, and ability to overcome terrain obstacles, the double-arch tunnel has become one of the tunnel forms often used in mountainous road tunnels and urban short tunnels in recent years. Compared with ordinary single-arch tunnels, the biggest difference between double-arch tunnels is that the two arches are connected by a partition wall. Therefore, the partition wall becomes an important force-bearing component of a multi-arch tunnel, and its stability is very important. It is directly related to To the construction safety, construction progress and operation safety of the double-arch tunnel. Therefore, it is necessary to strengthen the partition wall to improve the st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10E21F17/18
CPCE21D11/105E21F17/18
Inventor 高海东公惠民李刚郭彦兵薛翊国冀大禹高鹏王晓峰
Owner SHANDONG UNIV
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