Tunnel disease repair method and repair slurry

A repair method and technology for tunnel damage, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve problems such as loosening of soil layers or rock layers, water discharge, etc., to reduce loosening, high reliability, and reduce the probability of voiding Effect

Active Publication Date: 2016-08-31
JIANGSU DINGTAI ENG MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The Chinese Patent No. CN102052081 discloses a technology and construction method for the treatment of tunnel voids. The tunnel voids are filled with polymers for grouting to eliminate the voids. However, the surrounding areas of the voids are generally There is also the loosening of soil or rock layers other than the void, which will cause the above void. The above method only grouts the soil or rock at the void of the tunnel to fix the soil or rock at the void. Layers or rock formations are loosened causing voids at the site again
[0005] The Chinese Patent No. CN102108873 discloses a rapid treatment method for leaking water, but the method is mainly to block the seepage opening and the water gushing channel, and the water in the gushing water channel is not completely discharged, leaving the water in the gushing water channel. Part of the accumulated water will loosen the soil layer or rock layer behind the lining, posing potential hidden dangers

Method used

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  • Tunnel disease repair method and repair slurry
  • Tunnel disease repair method and repair slurry
  • Tunnel disease repair method and repair slurry

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Such as figure 1 As shown, a damaged tunnel generally includes: a rock-soil layer 1 , an aquifer 2 , a lining 3 , a void 4 , and a water gushing channel 10 .

[0038] The void generally occurs between the rock-soil layer and the water-resistant layer and may be located at the tunnel vault, the tunnel arch side or the tunnel vault bottom. The rock-soil layer around the void has a tendency to loosen, so it is necessary to Only by fixing and strengthening the empty part and its surroundings at the same time can the rock and soil layer around the empty place be in a stable state, so as to prevent the hollowing phenomenon from occurring again in the future.

[0039] The water gushing channels generally pass through the water-resisting layer 2 from the rock and soil layer behind the lining and extend to the surface of the lining 3. The water gushing channels are connected to each other, and generally multiple water gushing channels share a seepage outlet.

[0040] Such as ...

Embodiment 2

[0050] The slurry described in the present invention adopts a high-strength foaming resin, its model is SZ2, and the resin is added to the above-mentioned grouting equipment during grouting, and the viscosity of the resin flowing out from the grouting equipment is 200±65mPa • s, the volume of the resin slurry increases continuously during the flow, and its permeability is strong, which is suitable for quickly reaching the empty part or entering the gushing channel, and is suitable for discharging the accumulated water in the gushing channel under the action of grouting pressure. Fill the gushing water channel, when the above slurry is injected for 5 minutes, it will be completely solidified, and it will reach its final strength after 10 minutes of injection, including compressive strength ≥ 1.5MPa and bending strength ≥ 1.3MPa.

[0051] The slurry has the following characteristics:

[0052] (1) The slurry does not contain water, will not shrink when dry, and can densely fill v...

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Abstract

The invention relates to a method for repairing tunnel damage, which includes: detecting the position of the void and water gushing channel in the damaged tunnel by using detection radar; drilling the lining surface at the void position to obtain a grouting hole and installing the Grouting pipe, the grouting pipe extends into the void, drills a hole at the outlet of the water gushing channel to obtain a grouting hole 1 whose diameter is larger than the outlet of the water gushing channel, and the inner seal of the grouting hole 1 is matched with the grouting pipe 1; for the grouting hole and the grouting hole 1 to perform grouting and use the detection radar to detect the slurry filling inside the void and water gushing channel in real time, and stop grouting when the slurry is full of the void and water gushing channel; after the slurry solidifies and reaches the final strength, A number of longitudinal and transverse grooves extending from the contour line to the surrounding surface are opened on the lining surface; all the above-mentioned grooves are filled with slurry and cured; the empty space and the surrounding adjacent parts are fixed and strengthened, and the accumulated water in the seepage channel is discharged .

Description

technical field [0001] The invention relates to a method for repairing tunnel defects and a repairing slurry, which can repair defects such as emptying and water seepage of tunnel inner arches. Background technique [0002] With the continuous increase of highway and railway mileage in our country, the number of tunnels is also increasing year by year. With the increase of tunnel operation time, various tunnel diseases affect the safety of tunnels, among which void and water seepage are the two most important diseases that affect safety. The void refers to the void between the tunnel lining and the water-resisting layer, the void between the water-resisting layer and the initial support, the void between the initial support and the surrounding rock, and the void between the bottom of the slab and the inverted arch. The voided area poses a threat to the fixing of the lining of the tunnel, so timely detection and elimination of the voided area becomes a necessary step for tunn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/10
Inventor 陈赞宋妍曈冷一杰
Owner JIANGSU DINGTAI ENG MATERIAL
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