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Tunnel lining structure and construction method

A construction method and lining technology, which is applied in the direction of tunnel lining, tunnel, shaft lining, etc., can solve the problems of hidden safety hazards, low labor cost, large deformation, etc., and achieve a wide range of applications, small impact on construction period, and improved bearing capacity. Effect

Active Publication Date: 2015-07-15
CENT SOUTH UNIV
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  • Abstract
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Problems solved by technology

[0004] In order to overcome the deficiencies of the existing tunnel lining vault, part of the surrounding rock and initial support, which have excessive deformation and potential safety hazards, the present invention aims to provide a tunnel lining structure and construction method, which is easy to implement and saves energy. material, little impact on later construction, good effect, wider application range, simple construction method, convenient operation, and low labor cost

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  • Tunnel lining structure and construction method

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Embodiment Construction

[0045] A tunnel lining structure and construction technology, such as Figure 1-3 As shown, the geological and topographical conditions of the exit section of the tunnel are very poor. On the steep slope section, this section belongs to shallow buried, unbalanced pressure, gully catchment area. Excavate on both sides of the tunnel near the exit section, hang nets separately, assemble and connect double-layer arches, and spray concrete after installing anchor rods.

[0046] The specific operation is as follows:

[0047] (1) Carry out the excavation footage (50cm-60cm) of the hole body at the predetermined position.

[0048] (2) Fix the pre-bound steel mesh on the surrounding rock, using φ8 steel mesh (spacing 20cm×20cm arch wall);

[0049] (3) Assemble and install the steel arch. The specific method is: assemble the required I-beams into inner and outer steel arches, connect the I-beams with bolts, and connect them with the upper and lower steel plates with bolts, and weld ...

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Abstract

The invention discloses a tunnel lining structure and a construction method and aims at solving the problems that the deformation of existing tunnel vaults and partial surrounding rock and primary support is large and potential risks exist. The tunnel lining structure comprises an arch composed of a single-arch section and left and right multi-layer arch sections, the left and right multi-layer arch sections are fixed at two ends of the single-arch section respectively through connecting plates, the single-arch section is located above the multi-layer arch sections, a bottom plate is fixedly connected to the bottom of each of the two multi-layer arch sections, and the two bottom plates are fixedly connected with two tops of an inverted arch correspondingly. Accordingly, the tunnel lining structure is placed at a position where lining is required by a tunnel, too large deformation of vaults and partial surrounding rock and primary support can be effectively prevented, and the construction safety can be guaranteed.

Description

technical field [0001] The invention relates to a tunnel lining structure and a construction method, in particular to a lining structure with poor surrounding rock lithology and a construction method. Background technique [0002] After the tunnel is excavated, secondary stress occurs in the rock mass and generates some surrounding rock pressure, including loosening pressure, deformation pressure, impact pressure and expansion pressure. When the surrounding rock pressure exceeds the strength limit of the surrounding rock, the surrounding rock will Excessive deformation will occur, and then damage will occur, which will affect the safety of tunnel construction; especially for those weak rock masses with loose structure, rich water content and short standing time of surrounding rocks, there are more potential safety hazards, so , it is necessary to reasonably support the surrounding rock of the tunnel to ensure the safety of the tunnel. [0003] At present, the support measur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/18E21D11/10
Inventor 邹金锋李亮赵炼恒但汉成李帅帅程肖许渊谢荣福
Owner CENT SOUTH UNIV
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