Unfavorable geologic body grouting method under pressure-bearing seepage conditions

A kind of geological body and bad technology, applied in the direction of soil protection, construction, infrastructure engineering, etc., can solve the problems of complicated process, high cost of epoxy grouting, and difficult to achieve the reinforcement effect of conventional cement grouting, so as to improve the mechanical properties and anti-corrosion Permeability, low cost effect

Active Publication Date: 2017-05-31
POWERCHINA ZHONGNAN ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the construction period of the project, conventional cement consolidation and curtain grouting were performed successively on the dam foundation of Xiangjiaba, and some dam sections were also treated with conventional cement and epoxy composite grouting. However, due to the compact structure and deep distribution of the structural compression zone, conventional cement grouting The reinforcement effect is difficult to meet the technical indicators required by the design, while conventional epoxy grouting is expensive and complicated

Method used

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  • Unfavorable geologic body grouting method under pressure-bearing seepage conditions
  • Unfavorable geologic body grouting method under pressure-bearing seepage conditions
  • Unfavorable geologic body grouting method under pressure-bearing seepage conditions

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Embodiment 1

[0043] A mixed slurry is a cement-epoxy mixed slurry formed by adding a certain amount of epoxy slurry to an ordinary cement slurry. The ordinary cement slurry is a stable slurry configured with a strength grade of not less than 42.5MP ordinary Portland cement or other grouting cements with a water-cement ratio of 0.6:1-0.8:1. The epoxy grout is a high-permeability epoxy grout used for underwater grouting reinforcement, and the amount of the epoxy grout can be 10%-100% of the water content in the cement stabilization grout.

[0044] The water-cement ratio of cement-stabilized slurry and the mixing amount of epoxy slurry in the mixed slurry are mainly determined through field tests according to the formation conditions and engineering requirements. The following are the two preferred ratios.

[0045] Proportion and main performance of two kinds of mixed slurry adopted in the present invention

[0046]

[0047] Note: 1. The cement adopts high sulfate-resistant cement with a ...

Embodiment 2

[0050] The specific requirements of a grouting method for unfavorable geological bodies under the condition of confined water seepage of the present invention are as follows:

[0051] 1) The basic configuration of the main equipment and implements used in the present invention is as follows:

[0052] Basic configuration table of main equipment and tools used in the present invention

[0053]

[0054] 2) A grouting method for unfavorable geological bodies under pressure seepage conditions. First, according to the integrated drilling and irrigation process requirements, the grouting hole orifice is inlaid with a Φ89mm orifice pipe, and the orifice pipe passes through the contact surface between the concrete and the bedrock and enters the bedrock for 2.0m ;The drilling structure of the grouting hole is a small diameter of Φ75mm and one diameter to the end;

[0055] 3) In the first stage, the stable grout "drilling and filling together, top-down, high-pressure extrusion" grout...

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Abstract

The invention discloses an unfavorable geologic body grouting method under pressure-bearing seepage conditions. The unfavorable geologic body grouting method under the pressure-bearing seepage conditions comprises the following stages that I, a drilling and grouting process of integrated drilling and grouting, operation from top to bottom and high-pressure impact extrusion is adopted, and effective hole fixation and water-stop grouting are conducted on an unfavorable geologic body grouting hole section under the pressure-bearing seepage conditions; and II, a grouting process of operation from bottom to top, plug closing and high-pressure impact extrusion is adopted, and uniform effective high-pressure extrusion splitting, pressing seepage and infiltration grouting are conducted on an unfavorable geologic body under the pressure-bearing seepage conditions. Through the unfavorable geologic body grouting method, hole fixation, water-stop and high-pressure impact extrusion grouting can be effectively conducted on unfavorable geologic body grouting under the pressure-bearing seepage conditions, meanwhile, effective epoxy slurry seepage infiltration solidification can be conducted on unfavorable geology by means of the secreting action of high-pressure impact extrusion grouting composite slurry carrier epoxy.

Description

technical field [0001] The invention relates to a grouting method for unfavorable geological bodies under pressure seepage conditions, and belongs to the field of grouting anti-seepage and reinforcement treatment for unfavorable geological bodies such as structural extrusion fracture zones existing in hydropower station dam foundations or other building foundations. Background technique [0002] The dam foundation of the Xiangjiaba Hydropower Station on the Jinsha River has unfavorable geological bodies such as structural extrusion fracture zones, which are related to stress deformation and seepage stability of the dam foundation, and are key technical issues in the Xiangjiaba Hydropower Station project. [0003] During the construction period of the project, conventional cement consolidation and curtain grouting were performed successively on the dam foundation of Xiangjiaba, and some dam sections were also treated with conventional cement and epoxy composite grouting. Howev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/12E02D19/16E02D15/02
CPCE02D3/12E02D15/02E02D19/16E02D2250/003E02D2300/0023
Inventor 陈安重潘江洋胡大可黄灿新舒王强周运东张贵金樊凯
Owner POWERCHINA ZHONGNAN ENG
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