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A controlled infiltration chemical grouting method for unfavorable geological bodies

A chemical grouting and controllable technology, applied in soil protection, construction, infrastructure engineering, etc., can solve problems such as controlled infiltration of unfavorable geological bodies, out-of-control grout diffusion and ineffective grouting, and achieve the effect of solving technical problems

Active Publication Date: 2016-09-07
POWERCHINA ZHONGNAN ENG
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] The present invention aims to provide a controlled infiltration chemical grouting method for unfavorable geological bodies. The grouting method is aimed at the use of chemical grout for anti-seepage and reinforcement treatment of unfavorable geological bodies. Local splitting of small stress surfaces is common and the grout diffusion is out of control and ineffective. For technical problems such as perfusion, research and invention of a double-plug small-section long-closed up and down, constant and stable micro-injection rate controlled infiltration perfusion method is suitable for anti-seepage and reinforcement treatment of unfavorable geological bodies or other unfavorable structures by using chemical grout

Method used

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  • A controlled infiltration chemical grouting method for unfavorable geological bodies
  • A controlled infiltration chemical grouting method for unfavorable geological bodies
  • A controlled infiltration chemical grouting method for unfavorable geological bodies

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Embodiment Construction

[0044] 1. Equipment, machinery and chemical grouting materials

[0045] (1) The chemical grouting pump used in a controlled infiltration chemical grouting method for unfavorable geological bodies can be a miniature electric chemical grouting pump sold in the market. The main technical parameters are: ① pump volume: ≤ 1.0L / min; ② pump pressure: ≥10MPa;

[0046] (2) A method of controlled infiltration chemical grouting for unfavorable geological bodies uses hydraulic double plugs for the short-section long closed plugs, and requires independent control of shrinkage and expansion of the upper and lower plugs. For deep hole chemical grouting with a hole depth of more than 50m, the overall tensile and compressive strength of the plug is required to be high.

[0047] (3) The chemical grouting material used in a controlled infiltration chemical grouting method for unfavorable geological bodies can use modified epoxy grout or acrylate grout, as well as other chemical grouting grouts ...

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Abstract

The invention discloses an unfavorable geologic body controlling infiltration chemical grouting method, which mainly aims at the common technical problem that grouting can be ineffective due to the out-of-control diffusion of grout caused by the local cleavage of low-stress surfaces when chemical grout is adopted for seepage prevention and reinforcement for an unfavorable geologic body. The small-section-length controlling infiltration grouting method invented by research is characterized in that (1) double-plug small-section-length top-down closing of sections; (2) linear control of the steady grouting rate; (3) setting of a grouting completion standard. The unfavorable geologic body controlling infiltration chemical grouting method is applicable to the seepage prevention and reinforcement of unfavorable geologic bodies or other unfavorable structural bodies by adopting chemical grout.

Description

technical field [0001] The present invention is a controlled infiltration chemical grouting method for unfavorable geological bodies, which is mainly aimed at technical problems such as local splitting of small stress surfaces resulting in out-of-control grout diffusion and ineffective grouting when chemical grout is used for anti-seepage and reinforcement treatment of unfavorable geological bodies. A method of infiltration and perfusion with double plugs, small sections, long upper and lower closures, and constant and small injection rate control is invented, which is suitable for anti-seepage and reinforcement treatment of unfavorable geological bodies or other unfavorable structures by using chemical grout. Background technique [0002] The debris-like unfavorable geological body in the left bank abutment extrusion zone is the main engineering geological problem of Xiangjiaba Hydropower Station. During the construction period, multiple rows of cement slurry material curtai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D3/12
CPCE02D3/12E02D15/00
Inventor 陈安重黄灿新卢贤伟王毅范明刘良平舒王强刘晓丰
Owner POWERCHINA ZHONGNAN ENG
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