Deep-hole chemical grouting construction method applied to water leakage treatment of hydroelectric dam

A technology of chemical grouting and construction method, which is applied in water conservancy projects, sea area engineering, construction, etc. It can solve problems such as facility damage, failure to achieve reinforcement, concrete damage, etc., to save cost and investment, increase diffusion radius, and speed up The effect of project progress

Inactive Publication Date: 2014-03-19
CHINA HYDROPOWER ELEVENTH ENG BUREAU ZHENGZHOU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, when the cement curtain grouting method is used, the dense drilling will cause secondary damage to the original dam body and concrete block during the drilling process, and it is easy to break through the original water stop and the embedded parts and lines in the concrete. At the same time, when the cement curtain grouting method is used, due to the coarse cement particles, high-pressure grouting must be used to make the grouting slurry reach the predetermined diffusion radius, but too high pressure will cause the concrete to be damaged and the grouting pipe to collapse Injury, machine damage and other problems occur; and the cement grouting has low bonding strength with the surrounding substrate, and it is easy to form voids after settlement, resulting in the f

Method used

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  • Deep-hole chemical grouting construction method applied to water leakage treatment of hydroelectric dam
  • Deep-hole chemical grouting construction method applied to water leakage treatment of hydroelectric dam
  • Deep-hole chemical grouting construction method applied to water leakage treatment of hydroelectric dam

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Embodiment 1

[0031] Such as figure 1 As shown, a deep hole chemical grouting construction method applied to hydropower dam leakage water treatment of the present invention comprises the following steps: (1) grouting holes are respectively arranged on the fracture surface of the concrete crack and on the concrete surface, Fixing and drilling holes; (2) Use polyurethane for first-order grouting to stop water, seal the leaking surface in front of the dam, and prevent water leakage in the reservoir area; (3) use epoxy resin for second-order grouting reinforcement; (4) ) to seal the hole.

[0032] In the above embodiment, in step (1), the following steps of cleaning after drilling are also included: first flush with high-pressure water until the backwater is clean; then use high-pressure air to remove the remaining water in the hole; completely remove the grouting hole Dust, small particles and other sundries in the hole, and no residual cleaning water in the grouting hole, and then carry out ...

Embodiment 2

[0037] Such as Figure 1 to Figure 5 As shown, a kind of deep hole chemical grouting construction method applied to hydropower dam leakage water treatment of the present invention, the basic implementation steps are the same as embodiment 1, specifically, in order to avoid the ubiquitous string holes, In order to reduce material loss, reduce engineering investment, shorten construction period, and improve construction efficiency due to the phenomenon of waste holes, in step (1), use the principle of similar triangles to arrange holes, fix holes, and drill holes. Specifically: according to the effective diffusion radius R of chemical grouting grout in concrete cracks, in order to ensure that the chemical grout fills the crack surface compactly, determine the hole spacing S and row spacing h on the fracture surface of concrete cracks, and calculate according to the following formula:

[0038] S = 3 R - - ...

Embodiment 3

[0049] Such as Figure 1 to Figure 5 As shown, a kind of deep hole chemical grouting construction method applied to hydropower dam leakage water treatment of the present invention, the basic implementation steps are the same as embodiment 1 or embodiment 2, specifically:

[0050] In step (2), the grouting sequence from deep to shallow is used for hole-by-hole grouting; 72 hours after the grouting is completed, observe the water flow conditions of the adjacent epoxy resin grouting holes in the back row and the water leakage from the cracks in the corridor. If there is water leakage from the original water seepage joints in the corridor, then replenish polyurethane. If there is no water leakage from the original water seepage joints in the holes and in the corridor, proceed to step (3);

[0051] In step (3), the grouting step is as follows: firstly, a row of grouting holes at the bottom of the dam is used as the starting grouting point, and the grouting sequence is carried out r...

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Abstract

The invention relates to the technical field of hydraulic engineering and in particular relates to a deep-hole chemical grouting construction method applied to water leakage treatment of a hydroelectric dam. The method comprises the following steps: (1) arranging, fixing and drilling grout holes in the concrete crack fracture surface and the concrete surface respectively; (2) performing primary grouting by polyurethane; (3) performing secondary grouting by epoxy resin; (4) sealing the holes. According to the method, the technologies of fixing the holes by a similar triangle principle, performing primary and secondary grouting by polyurethane and epoxy grouting materials, grouting in a high-voltage pulse manner, grouting in a high-flow manner and the like are innovatively used, so that the problem of water leakage of the hydroelectric dam is radically solved, the reinforcement effect is achieved, a full guarantee is provided for long-term safe and stable running of the dam, a large amount of materials are saved, the construction efficiency is improved, the project progress is accelerated, and the cost is greatly reduced. Therefore, the method is suitable for popularization and application in the field of water leakage treatment of related parts such as hydroelectric dam cracks and inter-dam cross joints.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to a deep hole chemical grouting construction method applied to the treatment of seepage water in a hydropower station dam. Background technique [0002] At present, there are different degrees of water leakage problems in hydropower dams at home and abroad. For this, dense drilling is usually used for curtain cement grouting, or superficial chemical grouting is used for water sealing and leak plugging. There are many disadvantages in the above two processing methods. For example, when the cement curtain grouting method is used, the dense drilling will cause secondary damage to the original dam body and concrete block during the drilling process, and it is easy to break through the original water stop and the embedded parts and lines in the concrete. At the same time, when the cement curtain grouting method is used, due to the coarse cement particles, high-pre...

Claims

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Application Information

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IPC IPC(8): E02B3/16
Inventor 丁清杰宋亚涛黄俊玮张涛于琦袁自立
Owner CHINA HYDROPOWER ELEVENTH ENG BUREAU ZHENGZHOU CO LTD
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