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Repairing method and grout for tunnel defects

A repair method and technology for tunnel damage, which is applied in tunnels, tunnel linings, earthwork drilling, etc., can solve problems such as loosening of soil layers or rock layers, water discharge, etc., and achieve the effects of short curing time, reduced loosening, and high reliability

Active Publication Date: 2014-09-10
JIANGSU DINGTAI ENG MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 high polymer 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 water leakage, but the method mainly consists in blocking the seepage opening and the water gushing channel, and does not completely discharge the water in the water gushing channel, 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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  • Repairing method and grout for tunnel defects
  • Repairing method and grout for tunnel defects
  • Repairing method and grout for tunnel defects

Examples

Experimental program
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Effect test

Embodiment 1

[0036] 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 .

[0037] 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.

[0038] 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 a plurality of water gushing channels share a seepage outlet.

[0039] Such...

Embodiment 2

[0049] 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 water gushing channel, and is suitable for discharging the accumulated water in the water 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.

[0050] The slurry has the following characteristics:

[0051] (1) The slurry does not contain water, will not shrink when dry, and can dens...

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Abstract

The invention relates to a repairing method for tunnel defects. The repairing method includes the steps that detection radar is used for detecting the position of a cavity and the position of a passage where water burst happens in a defective tunnel; drilling is performed on the surface of a lining at the cavity position to obtain a grouting hole, a grouting pipe is installed and extends into the cavity position, drilling is performed on an outlet of the passage where water burst happens to obtain a first grouting hole of which the diameter is larger than that of the outlet of the passage where water burst happens, and a first grouting pipe is matched inside the first grouting hole in a sealed mode; grouting is performed on the first grouting hole and the grouting hole, the detection radar is used for detecting grout filling conditions inside the cavity and the passage where water burst happens in real time, and when the cavity and the passage where water burst happens are filled with grout, grouting is stopped; after the grout solidifies and reaches final strength, multiple longitudinal grooves and transverse grooves formed by extending outlines around are formed in the surface of the lining; all the grooves are filled with the grout, and the grout solidifies; the cavity and adjacent parts around the cavity are fixed and strengthened, and accumulated water in the passage where water burst happens are drained.

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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IPC IPC(8): E21D11/10
Inventor 陈赞宋妍曈冷一杰
Owner JIANGSU DINGTAI ENG MATERIAL
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