A centrifugal classification pre-splitting and microbial grouting curing and curing test device and method

Abstract

A centrifugal classification pre-splitting and microbial grouting curing and curing test device and method mainly include a sample storage rotating mechanism and a stirring mechanism; the sample storage rotating mechanism includes a rotating platform, and the lower end of the rotating platform is connected with a lower rotating motor through a lower rotor shaft, The upper end of the rotating platform is installed with a sample filling container and a porous tube from the outside to the inside. The interval between the sample filling container and the porous tube forms a solid storage space, and the porous tube forms a solution storage space; the stirring mechanism includes a stirring paddle, a stirring paddle The lower part is installed in the porous tube, the upper part of the stirring paddle protrudes from the porous tube and is detachably connected to the upper rotor shaft, and the upper rotor shaft is driven by the upper rotating motor; the stirring paddle and the upper rotor shaft are both hollow structures and the stirring paddle and solution storage space Connected. The invention provides a centrifugal grading pre-splitting and microbial grouting curing and curing test device and method, which can realize pre-splitting and pressure-stabilizing grouting during solid-added grading grouting.

Description

technical field [0001] The invention relates to the technical field of microbial grouting reinforcement, in particular to a centrifugal grading pre-splitting and microbial grouting curing and curing test device and method. Background technique [0002] In recent years, the technology of microbial reinforcement of rock and soil mass has developed rapidly at home and abroad. By pouring specific bacterial liquid and cementing liquid into the solid to be added (sand body, fractured rock mass), under the mineralization of microorganisms, carbonic acid is generated. Calcium crystals have filling and cementing effects on the solids, which enhances the physical and mechanical properties of the solids. The above-mentioned microbial process with carbonate as the product is called: Microbial Induced Calcium Carbonate Precipitation Technology (MICP), urease is produced through bacterial metabolism, and urea is hydrolyzed to generate and Forms an alkaline environment that binds Ca in...

AI Technical Summary

Problems solved by technology

In addition, the immersion method uses a large amount of materials and costs high

[0007] Generally speaking, most of the current grouting methods are from the outside to the inside. As the mineralization proceeds, the gelation of the bacteria themselves and the generated calcium carbonate will gradually block the seepage channel, and eventually lead to the formation of the outer edge or end of the reinforcement. There are more gelling substances, less internal gelling substances are formed, and the overall reinforcement effect is uneven

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