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

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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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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