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A closed pre-supported tunnel structure

A technology of tunnel structure and pre-support, which is applied in the field of tunnel construction, can solve the problems of easy settlement of tunnels and delays in construction period, and achieve the effects of large promotion value, increased construction speed, and reduced stress concentration

Active Publication Date: 2019-04-19
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to solve the problems that the pre-support structure of the prior art mentioned in the above background technology is easy to settle when used in tunnel construction, needs block construction to delay the construction period, and needs to apply secondary lining, etc., and provides a closed Pre-supported tunnel structure

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  • A closed pre-supported tunnel structure
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Embodiment Construction

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] Such as Figure 1~2 , a closed pre-supported tunnel structure, including figure 1 The a shown in is the ring-shaped pipe curtain structure outside the building boundary of the tunnel. The pipe curtain structure of this embodiment is a ring-shaped arched structure, which has good stability and small settlement, especially at the position below the tunnel boundary. , due to the bottom support of the annular pipe curtain, the pressure above and on both sides of the pipe curtain structure can be transmitted to the bottom of the pipe curtain structure for dissipation, which is equivalent to increasing the stress area and reducing the pressure in the prior art.

[0036] Such as Figure 1~2 As shown, the pipe screen structure of this embodiment includes a plurality of steel pipes 1 arranged along the tunnel axis direction, the const...

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Abstract

The invention relates to the technical field of tunnel building, and particularly relates to a closed pre-support tunnel structure. The closed pre-support tunnel structure comprises an annular pipe curtain structure which surrounds the outer side of a to-be-excavated tunnel limit; and the pipe curtain structure comprises a plurality of steel pipes which are distributed along the axis of a tunnel, the plurality of steel pipes are distributed along the circumferential direction of the tunnel at intervals and surround the outer side of the tunnel to form an annular structure, and the adjacent steel pipes are connected with through a steel plate to form a closed annular pre-support structure. According to the closed pre-support tunnel structure, the structure is simple, the construction is convenient, the stable tunnel excavating pre-support can be formed, the closed pre-support tunnel structure is beneficial to the rapid excavation of the tunnel, secondary lining is not needed, the construction cost is lowered, and the closed pre-support tunnel structure has great promotion values.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a closed pre-support tunnel structure. Background technique [0002] Shallow-buried soft soil and long-span mining tunnels have always been an engineering problem in the professional field of tunneling. The main construction difficulties are: the weak self-stability of the ground is poor, the ground deformation caused by tunnel construction is difficult to control, and the excavation diameter is easy to shrink and invade. At the same time, it causes a large subsidence of the ground surface. [0003] Existing shallow-buried mine tunnels generally use advanced support such as pipe sheds and grouting to increase the support stiffness, and then adopt methods such as block excavation to reduce the span of each excavation tunnel to control the formation deformation. The above existing technical means can meet the requirements of shallow buried large-span mining tunnel unde...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/14E21D11/10E21D11/14
CPCE21D9/14E21D11/10E21D11/107E21D11/14
Inventor 肖明清邓朝辉王均勇胡大伟蒋超周坤薛光桥
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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