Construction Method of Mountain Tunnel with Horizontal Pre-reinforcement Treatment

A tunnel construction, horizontal technology, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve problems such as weathering cannot be prevented, surrounding rocks cannot be closed, cracked rocks peel off, etc., and the construction method is simple, surface subsidence is avoided, The effect of preventing collapse

Inactive Publication Date: 2017-11-17
CHONGQING JIAOTONG UNIVERSITY
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the front bolt support measures cannot seal the surrounding rock, nor can it prevent weathering. Over time, it will lead to the spalling of the rocks in the cracks between the bolts.

Method used

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  • Construction Method of Mountain Tunnel with Horizontal Pre-reinforcement Treatment
  • Construction Method of Mountain Tunnel with Horizontal Pre-reinforcement Treatment

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Embodiment Construction

[0017] figure 1 It is a structural schematic diagram of the present invention; figure 2 It is a top view of the horizontal section of cast-in-situ piles distributed in the rock and soil layer of the mountain.

[0018] The mountain tunnel construction method of the horizontal pre-reinforcement treatment of the present embodiment, the mountain tunnel construction method of the horizontal pre-reinforcement treatment of the present invention, before the tunnel excavation construction, the rock and soil layer 1 above the tunnel excavation contour line 3 is drilled horizontally The cast-in-place pile 2 is pre-reinforced to achieve the purpose of stabilizing the soil; the cement concrete can penetrate into the gaps in the rock-soil layer 1 of the mountain body, and together with the cast-in-place pile 2 forms the supporting skeleton of the rock-soil layer 1 of the mountain body, forming a structure with a certain strength and The overall composite rock-soil layer 1 improves the sel...

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Abstract

The invention discloses a mountain tunnel construction method with horizontal pre-reinforcement treatment. Before the excavation of the bored tunnel, the mountain above the tunnel contour line structure is integrally reinforced in the horizontal direction by driving piles into the mountain. The cement concrete in the medium penetrates into the gaps in the rock and soil, and combines with the high-strength pile structure to form the supporting skeleton of the mountain rock and soil layer, which changes the stress state of the mountain rock and soil layer, and improves the stability and compression resistance of the mountain rock and soil layer. strength and shear strength, thereby improving the stability of the surrounding rock after tunnel excavation, effectively preventing rock and soil layers from collapsing, and avoiding surface subsidence, ensuring that the vault soil does not collapse during tunnel excavation, thereby ensuring The construction is smooth and safe, and can achieve long-term stability. It is suitable for weak rock formations and tunnel construction with large cross-section spans. It is not restricted by the geographical environment. The design and construction methods are simple, and one step is in place, which greatly improves the progress of the project.

Description

technical field [0001] The invention relates to tunnel construction, in particular to a mountain tunnel construction method with horizontal pre-reinforcement treatment. Background technique [0002] After the excavation of the tunnel, the surrounding rock will be greatly deformed, and the stability will deteriorate. In severe cases, it will cause the settlement of the ground surface, which will cause serious damage to the ground structures. During the excavation of the tunnel, the stability of the rock and soil ahead is very important. It is related to the safety of engineering construction, in order to ensure the stability of tunnel excavation, it is very necessary to take certain pre-reinforcement measures. In the prior art, more pre-reinforcement measures used in tunnel excavation are grouting, small conduits, frontal bolt reinforcement measures, and the like. [0003] The small conduit is a pre-reinforcement measure for shed support. Generally, the surrounding rock of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D21/00E21D20/02E21D11/10
Inventor 杨庆国何琳韩勇王家林陈世民陈燕
Owner CHONGQING JIAOTONG UNIVERSITY
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