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Tunnel waterproof and drainage structure and method

A technology for drainage structures and tunnels, applied in tunnels, drainage, and tunnel linings, etc., can solve the problems of increased water pressure on the back of the tunnel lining structure, damage to the tunnel lining structure, and blockage of the drainage holes of the tunnel. The effect of reducing maintenance costs and preventing excessive water pressure

Pending Publication Date: 2019-04-12
CHINA RAILWAY TUNNEL GROUP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to provide a tunnel waterproof and drainage structure and a tunnel waterproof and drainage method to solve the problem that in the prior art, the drainage holes of the tunnel are prone to blockage, which increases the water pressure on the back of the tunnel lining structure, thereby causing the risk of damage to the tunnel lining structure question

Method used

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  • Tunnel waterproof and drainage structure and method
  • Tunnel waterproof and drainage structure and method
  • Tunnel waterproof and drainage structure and method

Examples

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Effect test

Embodiment 1

[0049] A tunnel waterproof drainage structure, please refer to Figure 1 to Figure 12 .

[0050] Such as figure 1 and figure 2 As shown, the tunnel waterproof and drainage structure provided in this embodiment is used for the first and second grade surrounding rock cave sections. The tunnel waterproof and drainage structure includes an initial support layer 11, a waterproof coiled material layer 12, The secondary molded lining layer 13, the initial support layer 11 is the concrete slurry sprayed on the wall of the excavated tunnel or the anchor rod is first driven into the wall of the excavated tunnel and then the concrete slurry is sprayed, the initial support layer 11 and the waterproof membrane A layer of geotextile 121 is laid between the layers 12. The geotextile 121 has good water permeability and can protect and prevent the waterproof membrane layer 12 from being pierced. Concrete is poured after the dolly formwork. The arch wall of the tunnel is composed of the pr...

Embodiment 2

[0067] A tunnel waterproof drainage structure, please refer to Figure 13 to Figure 15 .

[0068] Such as Figure 13 As shown, the tunnel waterproof and drainage structure provided in this embodiment is used for III, IV, and V surrounding rock cave sections. The tunnel arch wall composed of the coiled material layer 22 and the secondary molded lining layer 23 is also provided with a tunnel invert at the bottom of the excavated tunnel. The tunnel invert includes the bottom primary support layer 241 and the bottom secondary molded lining layer 242 And filling layer 243, to enhance the supporting capacity of the entire tunnel.

[0069] Such as Figure 14 As shown, in the circular construction joint 231 section of the inverted arch of the tunnel, a mid-buried rubber waterstop 2421 is provided in the middle of the secondary molded lining layer 242 at the bottom, and a rubber waterstop 2421 is buried on the lower surface of the secondary molded lining layer 242 Back-adhesive rub...

Embodiment 3

[0072] A tunnel waterproof and drainage method, comprising:

[0073] (1) Construction of the main waterproof and drainage structure: the primary support layer, the waterproof membrane layer, and the secondary molded lining layer are successively installed on the wall of the excavated tunnel; A longitudinal blind pipe is buried at the bottom, and the two ends of the longitudinal blind pipe are bent inward and connected to the side ditch; a circumferential drainage board is arranged at intervals between the initial support layer and the waterproof membrane layer, and the two ends of the circumferential drainage board are connected to the corresponding vertical blind tube.

[0074] A layer of geotextile is laid on the waterproof membrane layer to prevent it from being punctured. The waterproof membrane layer constitutes the main waterproof structure of the tunnel arch wall, and the main drainage structure of the tunnel arch wall is composed of the above-mentioned circular drainag...

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Abstract

The invention discloses a tunnel waterproof and drainage structure and a method. The tunnel waterproof and drainage structure includes a tunnel arch wall composed of an initial supporting layer, a waterproof roll layer and a secondary model-building lining layer, wherein the initial supporting layer, the waterproof roll layer and the secondary model-building lining layer are sequentially arrangedon a wall surface of an excavated tunnel; longitudinally extending side ditches are arranged on both sides of an excavated tunnel bottom lining structure; a longitudinal blind pipe is embedded at thebottom of the tunnel arch wall; the two ends of the longitudinal blind pipe bend inward bend and communicate with the side ditches; circumferential drainage plates are arranged between the initial supporting layer and the waterproof roll layer at intervals; a transverse standby drainage pipe is further arranged at the bottom of the tunnel arch wall; and the outer end of the standby drainage pipe communicates with the corresponding side ditches, and the inner end of the standby drainage pipe is positioned at the initial supporting layer. According to the tunnel waterproof and drainage structureand the method, by arranging the standby drainage pipe, when the two end openings of the longitudinal blind pipe are blocked by solidified concrete, the standby drainage pipe can be used to reduce water pressure on the back of the tunnel arch wall, and the damages to the tunnel structure caused by the excessive water pressure are prevented.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a tunnel waterproof and drainage structure. Background technique [0002] In tunnel engineering, it is necessary to bury the circumferential drainage channel and the longitudinal drainage channel in the constructed tunnel wall. Generally, the circumferential drainage channel is connected to the longitudinal drainage channel. Both the circumferential drainage channel and the longitudinal drainage channel are permeable structures, so that the tunnel lining behind the The accumulated water is discharged from the outlet of the longitudinal drainage channel into the measuring trenches on both sides of the tunnel to reduce the water pressure behind the lining structure. [0003] During the grouting construction of tunnel lining backfill, due to the certain pressure of the concrete injected into the formwork of the trolley, the grout may enter the longitudinal drainage chann...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F16/02E21D11/38E21D11/14
CPCE21D11/14E21D11/38E21F16/02
Inventor 何元俊刘田刘广志强旭宏刘飞
Owner CHINA RAILWAY TUNNEL GROUP CO LTD
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