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Method for solving disengagement and water seepage of internal arch of tunnel

A tunnel inner and void-free technology, which is applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve problems such as water discharge, soil or rock loosening, and achieve the effects of reducing loosening, short curing time, and high reliability

Active Publication Date: 2014-09-10
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 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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  • Method for solving disengagement and water seepage of internal arch of tunnel
  • Method for solving disengagement and water seepage of internal arch of tunnel
  • Method for solving disengagement and water seepage of internal arch of tunnel

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Embodiment 1

[0036] like 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] like f...

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 method for overcoming tunnel defects, in particular to a method for solving disengagement and water seepage of an internal arch of a tunnel. The method includes the steps that a detection radar is utilized for detecting the disengagement position and the position of a water seepage channel in a damaged tunnel, a grouting hole is obtained by drilling a hole in the surface of a lining of the disengagement position, a grouting pipe is installed in the grouting hole and extends into the disengagement position, a first grouting hole of which the diameter is greater than that of an outlet of the water seepage channel is obtained by drilling a hole in the outlet of the water seepage channel, and a first grouting pipe is arranged in the first grouting hole in a sealed and matched mode; grout is injected into the grouting hole and the first grouting hole, the grout filling situation inside the disengagement position and the water seepage channel is detected in real time through the detection radar, and grouting is stopped when the disengagement position and the water seepage channel are filled with the grout; after the grout is solidified and reaches the final strength, multiple longitudinal slots and multiple transverse slots which extend from the outline to the periphery are formed in the surface of the lining; all the slots are filled with grout, the grout is solidified; the disengagement position and the adjacent portions surrounding the disengagement position are fixed and strengthened, and water accumulated in the water seepage channel is drained.

Description

technical field [0001] The invention relates to a method for repairing tunnel defects, capable of repairing 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 tunnel maintenance. ...

Claims

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Application Information

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IPC IPC(8): E21D11/10E21D11/38
CPCE21D11/10E21D11/38
Inventor 陈国贤何伟兴董军
Owner JIANGSU DINGTAI ENG MATERIAL
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