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Method for performing curtain grouting construction on tunnel by water rich fault influence zone

A technology of curtain grouting and construction method, which is applied in tunnels, tunnel linings, earthwork drilling and mining, etc. It can solve problems such as water seepage and sudden water gushing, and achieve safe and reliable construction schemes, short construction period, and reduce large water gushing The effect of the likelihood of occurrence

Active Publication Date: 2012-06-13
CHINA RAILWAY 23RD CONSTR BUREAU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Therefore, in the construction of the tunnel construction method in the prior art to the water-rich fault affected zone, there are still deficiencies, and it is easy to cause water seepage and emergency situations of sudden water gushing

Method used

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  • Method for performing curtain grouting construction on tunnel by water rich fault influence zone
  • Method for performing curtain grouting construction on tunnel by water rich fault influence zone
  • Method for performing curtain grouting construction on tunnel by water rich fault influence zone

Examples

Experimental program
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Effect test

Embodiment 1

[0052] see Figure 1 to Figure 11 , the present embodiment passes through the curtain grouting construction method of the tunnel affected by the water-rich fault zone, comprising the following steps:

[0053] a. Construction of a grout-stop wall; a grout-stop wall is built inside the operation face, and a gap of 2m is provided between the grout-stop wall and the operation face in the radial direction;

[0054] b. Backfill the gap between the grout stop wall and the tunnel face;

[0055] c. Mark the drilling position and hole number on the slurry wall;

[0056] d, pulping; prepare cement, water glass double fluid slurry, wherein the water-cement ratio of cement is 0.6: 1~1: 1, the water glass concentration is 30~40Be, and the volume ratio of cement: water glass is 1: 0.5~1 : 1;

[0057] e. Drilling and grouting are completed by step-by-step grouting, and the footage per cycle is 5m.

[0058] Through the combination of building a grout-stop wall on the operation face and ste...

Embodiment 2

[0060] see Figure 1 to Figure 11 , the present embodiment passes through the curtain grouting construction method of the tunnel affected by the water-rich fault zone, comprising the following steps:

[0061] a. Construction of a grout-stop wall; build a grout-stop wall inside the operation face, and a gap of 5m is set between the grout-stop wall and the operation face in the radial direction;

[0062] b. Backfill the gap between the grout stop wall and the tunnel face;

[0063] c. Mark the drilling position and hole number on the slurry wall;

[0064] d, pulping; prepare cement, water glass double fluid slurry, wherein the water-cement ratio of cement is 0.6: 1~1: 1, the water glass concentration is 30~40Be, and the volume ratio of cement: water glass is 1: 0.5~1 : 1;

[0065] e. Drilling and grouting are completed by step-by-step grouting, and the footage per cycle is 10m.

Embodiment 3

[0067] see Figure 1 to Figure 11 , the present embodiment passes through the curtain grouting construction method of the tunnel affected by the water-rich fault zone, comprising the following steps:

[0068] a. Construction of a grout-stop wall; build a grout-stop wall inside the operation face, and a gap of 5m is set between the grout-stop wall and the operation face in the radial direction;

[0069] b. Backfill the gap between the grout stop wall and the tunnel face;

[0070] c. Mark the drilling position and hole number on the slurry wall;

[0071] d, pulping; prepare cement, water glass double fluid slurry, wherein the water-cement ratio of cement is 0.6: 1~1: 1, the water glass concentration is 30~40Be, and the volume ratio of cement: water glass is 1: 0.5~1 : 1;

[0072] e. Carry out surrounding rock reinforcement and water blocking inside the tunnel;

[0073] f. Drilling and grouting are completed by step-by-step grouting, and the footage per cycle is 10m.

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Abstract

The invention discloses a method for performing curtain grouting construction on a tunnel by a water rich fault influence zone. The method comprises the following steps of: a, constructing a wall for grouting, namely constructing the wall for grouting in a tunnel face, wherein a gap of 2 to 5m is reserved on the wall for grouting and the tunnel face in the radial direction; b, backfilling between the wall for grouting and the tunnel face; and c, marking drilling positions and hole numbers on the wall for grouting. By combining a mode of constructing the wall for grouting on the tunnel face, and a segmentation advancing curtain grouting mode, possibility of sudden water gushing can be reduced; a construction scheme is more safe and reliable; and the method is short in construction period, and low in cost, and is particularly suitable for curtain grouting construction for preventing gushing water under tufflava geological conditions, and provides enough operation space for grouting and drilling equipment.

Description

technical field [0001] The invention relates to a tunnel construction method, in particular to a curtain grouting construction method suitable for tunnels passing through water-rich fault-influenced zones under tuff lava geological conditions. Background technique [0002] At present, during tunnel construction, the principle of "mainly drainage" is adopted for groundwater discharge; for tunnels passing through karst and fractured zones, where the groundwater is expected to be relatively large and the ecological environment is affected by drainage, we adopt the principle of "mainly drainage". Based on the principle of "limited discharge" to achieve the purpose of effective water gambling, reliable waterproof, environmental protection, and economical rationality. [0003] In the 11th issue of "Shanxi Architecture" published in April 2009, a "Application of Advanced Curtain Grouting Technology in High-pressure Water-rich Tunnel" was disclosed, article number: 1009-6825(2009)11...

Claims

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Application Information

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IPC IPC(8): E21D11/10E21D9/00E21D11/38
Inventor 李铎李洪奇田宝华袁全祥陈幼林金坤学王怀强张海洋刘延龙王红霍莉
Owner CHINA RAILWAY 23RD CONSTR BUREAU LTD
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