Tunnel collapse disposing method and tunnel collapse support structure

A technology of supporting structure and processing method, which is applied in the direction of tunnel, tunnel lining, earthwork drilling and mining, etc., can solve the problems of increased investment and delay of construction period, and achieve the effect of shortening the construction period and saving engineering investment

Inactive Publication Date: 2015-11-18
CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002]During the excavation and construction of tunnels in water conservancy and hydropower projects, the types of surrounding rocks that the tunnel passes through vary greatly. , for example, the three types of surrounding rocks adopt anchor spraying measures, and the fourth types of surrounding rocks adopt anchor spraying measures partially supplemented by steel support sup

Method used

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  • Tunnel collapse disposing method and tunnel collapse support structure
  • Tunnel collapse disposing method and tunnel collapse support structure
  • Tunnel collapse disposing method and tunnel collapse support structure

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Embodiment

[0018] In this example, the existing primary support such as figure 2 Shown, the structural representation when the present invention implements is as figure 1 As shown, due to the stress release and adjustment of the surrounding rock, the effect of groundwater, and the existence of weak zones in the surrounding rock, the local parts of the first-stage support occurred as follows: figure 2 For the collapse shown, if the support is not carried out in time, the collapse may continue to expand, so it is necessary to carry out secondary support for the collapsed part of the tunnel. The secondary support adopts arch-on-arch support.

[0019] The structure of the present invention is as figure 1 Shown: The structure includes the previous primary support 1, and the secondary support is carried out in the collapse cavity 6 on the top of the primary support. The structure of the secondary support is the same as that of the primary support structure, including steel arches ...

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Abstract

The invention discloses a tunnel collapse disposing method and a tunnel collapse support structure. The method is characterized in that an arch-on-arch structure corresponding to the shape and the range of a collapse cavity is arranged on the top of a steel arch frame of a primary support; the collapse cavity is supported through the arch-on-arch structure; and meanwhile, network concrete and anchor rods are used in an auxiliary way, so that the further enlargement of the collapse is prevented. Through the arrangement of the arch-on-arch structure on the top of the steel arch frame, the problems that the collapse cavity stress continuously changes and the collapse cavity trend is further enlarged are effectively solved; through engineering measures, the engineering requirements are met; the engineering investment is reduced; and the engineering construction period is shortened.

Description

technical field [0001] The invention relates to a treatment method for tunnel collapse and a support structure for tunnel collapse, and belongs to the technical field of hydraulic construction in water conservancy and hydropower projects. Background technique [0002] During the excavation and construction of tunnels in water conservancy and hydropower projects, the types of surrounding rocks that the tunnel traverses vary greatly. After the geologists judge the types of surrounding rocks on site, the first-stage support is carried out in time. Anchor shotcrete is partially supplemented with steel support; according to engineering experience, most of the support can meet the needs of the project after the completion of the support, but due to the release and adjustment of surrounding rock stress, the effect of groundwater, and the existence of weak belts in surrounding rock, the tunnel part is still Collapse may occur. At this time, anchor shotcrete support is generally adop...

Claims

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Application Information

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IPC IPC(8): E21D11/18E21D11/10E21D20/00
Inventor 张涛俞灵光秦晓亮彭继乐赵继勇余志超刘淑芳赵星
Owner CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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