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A test device and method for demoulding microbial grouting reinforcement silt

A technology of grouting reinforcement and test equipment, which is applied in the direction of soil material testing, material inspection products, and preparation of test samples. It can solve the problems of difficult grouting of silt samples, uneven microbial solidification, and damage to the demoulding structure of samples. and other problems, to achieve the effect of simple and convenient complete demoulding, uniform reinforcement effect and sufficient microbial mineralization

Active Publication Date: 2021-07-13
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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  • A test device and method for demoulding microbial grouting reinforcement silt
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  • A test device and method for demoulding microbial grouting reinforcement silt

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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] Such as figure 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] Such as figure 2 ...

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Abstract

The invention discloses a test device and method for demoulding microorganism grouting reinforcement silt. The device consists of four parts: a GDS pressure controller, a slurry storage device, a reaction device and a filtrate collection bottle. The pressure is provided by the GDS pressure controller, and the grouting speed is precisely controlled, so that the grout is slowly and evenly injected into the soil sample. The sample preparation barrel in the reaction device is made of two plexiglass tubes, which can not only ensure the sealing of the device, but also facilitate the complete demoulding. The invention utilizes the microbial mineralization technology to solidify the silt, adopts the method of step-by-step injection of the bacteria solution and the cementing solution, and preferably avoids the blockage of the grouting port caused by the direct mixing of the cementing solution and the bacteria solution. At the same time, the method of grouting from bottom to top is adopted, so that the grouting liquid can be evenly distributed in the soil sample, ensuring the 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 Patents(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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