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A low-risk construction method for muddy water-rich broken shallow tunnels

A technology for shallow buried tunnels and construction methods, applied in tunnels, tunnel linings, drainage, etc., can solve problems such as tunnel flooding, danger, and limited drainage capacity of tunnels, and achieve the effects of reducing water pressure and improving safety

Active Publication Date: 2021-11-02
高军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The construction of muddy water-rich broken shallow tunnels usually adopts the methods of full-section curtain grouting water blocking reinforcement and direct drainage, and construction techniques such as excavating water release branch holes from the side wall of the tunnel to divert water and reduce pressure, and then grouting water blocking methods. Traditional curtain grouting seals the cracks in the ultra-high pressure formation and concentrates the pressure outside the surrounding rock reinforcement circle. The tunnel structure will bear a pressure of more than 6.3Mpa, and the structural stability cannot be guaranteed. The drainage capacity in the tunnel is limited, and the water will be released for a long time. It is extremely easy to cause the tunnel to flood, causing great danger

Method used

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  • A low-risk construction method for muddy water-rich broken shallow tunnels
  • A low-risk construction method for muddy water-rich broken shallow tunnels
  • A low-risk construction method for muddy water-rich broken shallow tunnels

Examples

Experimental program
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Effect test

Embodiment 1

[0057] see Figure 1-2 , a low-risk construction method for muddy water-rich broken shallow tunnels, comprising the following steps:

[0058] S1: Ground surface treatment, manually trimming, backfilling, compacting and constructing clay layer and surface waterproof and drainage layer for collapsed pits and cracks that appear during construction;

[0059] S2: Tunnel side treatment, well point dewatering wells 2 are set on both sides of the tunnel 1, drainage holes 3 with a diameter of 60 mm are set on the side walls of the dewatering wells 2, and small grouting conduits are inserted on the upper surface of the drainage holes 3, and the lower surface is treated for waterproofing and drainage , the drainage hole 3 and the tunnel 1 are perpendicular to each other, and the angle between the drainage hole 3 and the horizontal plane is 45 degrees to 60 degrees; the drainage hole 3 and the precipitation well 2 reduce the influence of groundwater on the tunnel surface, and the drainage...

Embodiment 2

[0078] see figure 1 , Figure 6 , a low-risk construction method for muddy water-rich broken shallow tunnels, comprising the following steps:

[0079] S1: Ground surface treatment, manually trimming, backfilling, compacting and constructing clay layer and surface waterproof and drainage layer for collapsed pits and cracks that appear during construction;

[0080] S2: Tunnel side treatment, well point dewatering wells 2 are set on both sides of the tunnel 1, drainage holes 3 with a diameter of 60 mm are set on the side walls of the dewatering wells 2, and small grouting conduits are inserted on the upper surface of the drainage holes 3, and the lower surface is treated for waterproofing and drainage , the drainage hole 3 and the tunnel 1 are perpendicular to each other, and the angle between the drainage hole 3 and the horizontal plane is 45 degrees to 60 degrees; the drainage hole 3 and the precipitation well 2 reduce the influence of groundwater on the tunnel surface, and th...

Embodiment 3

[0099] see figure 1 , Figure 7 , a low-risk construction method for muddy water-rich broken shallow tunnels, comprising the following steps:

[0100] S1: Ground surface treatment, manually trimming, backfilling, compacting and constructing clay layer and surface waterproof and drainage layer for collapsed pits and cracks that appear during construction;

[0101] S2: Tunnel side treatment, well point dewatering wells 2 are set on both sides of the tunnel 1, drainage holes 3 with a diameter of 60 mm are set on the side walls of the dewatering wells 2, and small grouting conduits are inserted on the upper surface of the drainage holes 3, and the lower surface is treated for waterproofing and drainage , the drainage hole 3 and the tunnel 1 are perpendicular to each other, and the angle between the drainage hole 3 and the horizontal plane is 45 degrees to 60 degrees; the drainage hole 3 and the precipitation well 2 reduce the influence of groundwater on the tunnel surface, and th...

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Abstract

The invention discloses a low-risk construction method for muddy water-rich broken shallow tunnels, which belongs to the technical field of tunnel construction and includes the following steps: S1: surface treatment; S2: tunnel side treatment, setting well point dewatering wells on both sides of the tunnel, dewatering A drainage hole with a diameter of 60mm is set on the side wall of the well, and a small grouting conduit is inserted on the upper surface of the drainage hole, and the lower surface is treated for waterproofing and drainage. The drainage hole is perpendicular to the direction of the tunnel, and the angle between the drainage hole and the horizontal plane is 45 degrees. ‑60 degrees; S3: Treatment inside the tunnel; S4: Enhance waterproofing and drainage in the later stage of the tunnel. The drainage hole can drain the water in the cement-rich soil in the direction of the tunnel during and after the tunnel construction, reduce the water pressure on the tunnel wall from the top and side of the tunnel, and improve the safety of the tunnel construction.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a low-risk construction method for muddy water-rich broken shallow buried tunnels. Background technique [0002] The construction of muddy water-rich broken shallow tunnels usually adopts the methods of full-section curtain grouting water blocking reinforcement and direct drainage, and construction techniques such as excavating water release branch holes from the side wall of the tunnel to divert water and reduce pressure, and then grouting water blocking methods. Traditional curtain grouting seals the cracks in the ultra-high pressure formation and concentrates the pressure outside the surrounding rock reinforcement circle. The tunnel structure will bear a pressure of more than 6.3Mpa, and the structural stability cannot be guaranteed. The drainage capacity in the tunnel is limited, and the water will be released for a long time. It is extremely easy to cause tunnel ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/10E21D11/18E21D11/38E21F16/02
CPCE21D11/10E21D11/18E21D11/38E21F16/02
Inventor 高军林晓谭发刚熊晓晖黄正凯杨立云贾超吴德兴项小珍李行利张旭东游国平杨超张晓晓徐腾辉
Owner 高军