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Test device for demoulding microbial-grouting reinforcing silt and method thereof

A technology of grouting reinforcement and test device, which is applied in soil material testing, material inspection, and preparation of test samples, etc. and other problems, to achieve the effect of simple, convenient and complete demoulding, uniform reinforcement effect, and sufficient microbial mineralization.

Active Publication Date: 2019-07-02
HEFEI UNIV OF TECH
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Problems solved by technology

[0007] Purpose of the invention: In order to solve the problems and deficiencies in the above-mentioned prior art, the present invention provides a test device and method for demolding microbial grouting reinforcement silt, thereby solving the difficulty of grouting silt samples and the difficulty of microbial solidification. Problems such as uniformity and sample demoulding structure damage

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  • Test device for demoulding microbial-grouting reinforcing silt and method thereof
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  • Test device for demoulding microbial-grouting reinforcing silt and method thereof

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[0043] In order to further illustrate the technical solutions of the present invention, the present invention will be described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0044] likefigure 1 As shown, a test device for demoulding microbial solidified silt according to the present invention includes a GDS pressure controller 1 , a slurry storage device 2 , a reaction device 3 , a filtrate collection bottle 4 and a hose 5 . The GDS pressure controller 1 can extract deionized water, connect it to the bottom of the slurry storage device 2 through a hose 5, squeeze and inject deionized water to apply pressure, and the maximum applied pressure can reach 2MPa. Set a fixed flow rate, control the bacteria solution and cementing solution to be slowly injected into the soil sample 30 at a fixed flow rate, so that the bacteria solution and cementing solution can be evenly distributed in the soil sample 30 .

[0045] like figure 2 and ...

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Abstract

The invention discloses a test device for the demoulding microbial-grouting reinforcing silt and a method thereof. The device comprises a GDS pressure controller, a slurry storage device, a reaction device and a filtrate collection bottle. The GDS pressure controller is used for providing the pressure to control the grouting speed precisely, so that serous fluid is injected into a soil sample slowly and uniformly. A sample preparation barrel in the reaction device is formed by butting joint of two organic glass tubes, thereby ensuring the airtightness of the device and realizing demoulding conveniently and completely. According to the invention, the silt is reinforced by using the microbial mineralization technology; and because of stepwise bacterial liquid injection and cement liquid, blocking of the grouting hole caused by direct mixing of the cement liquid and bacterial liquid is avoided. Meanwhile, with the bottom-to-top grouting mode, the grouting liquid can be uniformly distributed in the soil sample to ensure the high uniformity and integrity of the solidification of the soil sample.

Description

technical field [0001] The invention belongs to the technical field of indoor test tools for soil reinforcement by using microorganisms, and in particular relates to a test device and method for demolding microorganism grouting reinforcement silt. Background technique [0002] Microbial geotechnical technology is currently one of the most innovative technical fields in geotechnical engineering. This technology creatively uses abundant natural non-toxic microbial resources to change the microstructure and composition of rock and soil, thereby improving its engineering mechanical properties, including strength, stiffness and permeability etc. The research and application of microbial geotechnical technology mostly focus on rock and soil mass reinforcement, sand and soil liquefaction prevention, restoration of earth-rock brick architectural relics and concrete crack repair, etc. Due to the limitation of the size of the bacteria itself, the current microbial geotechnical techno...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24G01N1/28
CPCG01N1/28G01N33/24
Inventor 查甫生刘从民康博王昊许龙
Owner HEFEI UNIV OF TECH
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