Construction method for enabling shallowly buried and darkly excavated tunnel to pass through cottage area

A technology of shallow burial and underground excavation and construction method, which is applied in tunnels, tunnel linings, earthwork drilling and mining, etc., and can solve problems such as no construction plan.

Active Publication Date: 2015-04-08
CHINA RAILWAY 20 BUREAU GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But nowadays, there are very few construction materials for reference in the construction of shallow buried tun...

Method used

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  • Construction method for enabling shallowly buried and darkly excavated tunnel to pass through cottage area
  • Construction method for enabling shallowly buried and darkly excavated tunnel to pass through cottage area
  • Construction method for enabling shallowly buried and darkly excavated tunnel to pass through cottage area

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Embodiment Construction

[0063] Such as figure 1 Shown is a construction method for a shallow-buried underground excavation tunnel passing through a bungalow area. The tunnel hole of the shallow-buried underground excavation tunnel to be constructed is excavated from the back to the front by using the step excavation method, and the tunnel is excavated from the back to the front during the excavation process. The tunnel hole formed by excavation is used for initial support; combined with figure 2 , the tunnel hole is composed of an upper pilot hole 1 and a lower pilot hole 2 directly below the upper pilot hole 1, and the rear part of the tunnel hole is connected with the vertical shaft;

[0064] The initial support structure of the tunnel hole includes multiple grid steel frames that support the tunnel hole from the back to the front, and a layer of grid steel frame that is hung on the inner wall of the tunnel hole after the installation of the grid steel frame is completed. The reinforcement mesh a...

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Abstract

The invention discloses a construction method for enabling a shallowly buried and darkly excavated tunnel to pass through a cottage area. The construction method comprises the following steps: excavating a tunnel hole of the constructed shallowly buried and darkly excavated tunnel from back to front through a step excavation process, and performing preliminary bracing on the tunnel hole formed by excavating from back to front in an excavating process, wherein the tunnel hole consists of an upper guide hole and a lower guide hole positioned right below the upper guide hole, the rear part of the tunnel hole is connected with a vertical well, the preliminary bracing structure of the tunnel hole comprises a plurality of grating steel frameworks for supporting the tunnel hole from back to front, a layer of bar-mat reinforcement suspended on the inner wall of the tunnel hole and a concrete layer jetted on the inner wall of the tunnel hole. The process for excavating the tunnel hole of the shallowly buried and darkly excavated tunnel comprises the following steps: I, excavating the initial segment of the upper guide hole; II, excavating the initial segment of the lower guide hole; III, synchronously excavating the upper and the lower guide holes. The construction method disclosed by the invention is simple in step, reasonable in design, convenient in construction, good in construction effect, capable of simply completing the construction process of the shallowly buried and darkly excavated tunnel that passes through the cottage area, and safe and reliable in a construction process.

Description

technical field [0001] The invention belongs to the technical field of tunnel construction, and in particular relates to a construction method for a shallow-buried tunnel crossing a bungalow area. Background technique [0002] Compared with the open-cut method, the construction of the subway tunnel by the shallow-buried underground excavation method has the advantages of low demolition cost and small traffic impact. Compared with the shield tunneling method, it has strong adaptability to the stratum and is suitable for various cross-section types. , has the advantages of low cost and small investment. With the large-scale construction of urban rail transit in my country, shallow buried excavation construction will become more and more important in urban underground engineering construction, especially the construction technology of underground excavation tunnels passing through buildings and structures, it is necessary to control the stability of the tunnel into the hole ind...

Claims

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Application Information

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IPC IPC(8): E21D9/00E21D9/14E21D11/10E21D11/15
CPCE21D9/00E21D9/14E21D11/10E21D11/152
Inventor 吴应明郭朋超仲维玲刘冰范振芳
Owner CHINA RAILWAY 20 BUREAU GRP
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