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Method for sealing vertical cracks of basement concrete structures by using microbial grouting

A technology for concrete structures and basements, used in underwater structures, infrastructure engineering, water conservancy projects, etc., can solve problems such as the increase of surrounding pH value, and achieve the effect of reducing water seepage and sound time.

Active Publication Date: 2012-06-13
SHANDONG JIANGU SPECIAL ENG LIMIT
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AI Technical Summary

Problems solved by technology

Its mechanism is to use microorganisms to induce mineral deposits to fill and repair concrete defects: some basophilic soil microorganisms use their own urease to hydrolyze urea into ammonia and carbon dioxide, and the increase in the amount of ammonia generated by decomposition will cause the surrounding pH value to change. increased, resulting in the deposition of calcium carbonate
However, this method does not involve the specific method and steps of injecting the bacterial solution and the repairing nutrient solution into the cracks.

Method used

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  • Method for sealing vertical cracks of basement concrete structures by using microbial grouting
  • Method for sealing vertical cracks of basement concrete structures by using microbial grouting
  • Method for sealing vertical cracks of basement concrete structures by using microbial grouting

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0036] A method for microbial grouting to block vertical cracks in basement concrete structures, such as Figure 1-Figure 5 As shown, the outer side of the concrete outer wall 1 of the basement is a waterproof layer and a soil filling layer 3. If a vertical crack 2 appears in the outer concrete wall 1 of the basement, it is difficult to excavate and fill the outer side of the wall, and the vertical crack 2 is exposed. To seal the cracks, use the method of grouting inside the wall to seal the cracks. The steps are as follows:

[0037] (1) Punch

[0038] In the vertical cracks, since the microbial bacteria liquid and nutrient salt liquid flow downward under the action of their own weight, and the cracks are thin, it is difficult to directly inject liquid into the depth of the cracks. Therefore, the pouring holes 4 are arranged vertically along the cracks...

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Abstract

The invention discloses a method for sealing vertical cracks of basement concrete structures by using microbial grouting, which seals the cracks by using a method of grouting into cracks on the inner sides of walls. In particular, the method comprises the steps of punching holes, cleaning the holes, sealing the surfaces of the cracks, preparing bacterium fluid and nutritive salt solution, grouting the bacterium fluid, grouting the nutritive salt solution, and sealing and plugging grouting holes. The bacterium fluid can induce calcium chloride to generate calcium carbonate sedimentary to effectively fill, seal and plug the cracks and the grouting holes. Water injection tests and observation after raining show that the original cracks are obviously reduced in water seepage.

Description

technical field [0001] The invention relates to a method for sealing and repairing concrete cracks in civil engineering, in particular to a method for microbial grouting to seal vertical cracks in basement concrete structures. Background technique [0002] According to the survey and research on the basements of high-rise buildings in China in recent years, the number of cracks in the basement walls of high-rise buildings accounts for about 85% of the total number of projects investigated, and the phenomenon of cracks in the bottom plate accounts for about 10% of the total number of investigated projects. At the same time, the analysis of the investigation results found that among the various adverse consequences caused by cracks, leakage accounted for 60%. Therefore, the crack control of concrete structures has become one of the important research topics in construction engineering. Especially in the last 20 years, after pumping commercial concrete has been widely used, th...

Claims

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Application Information

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IPC IPC(8): E02D29/16
Inventor 贾强张鑫
Owner SHANDONG JIANGU SPECIAL ENG LIMIT
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