Microorganism reinforcing reaction Device, system and method

Abstract

The invention discloses a microorganism reinforcing reaction device, system and method. According to the microorganism reinforcing reaction device disclosed by the invention, the two axial ends of aninner cylinder arranged in a chamber of an outer cylinder are propped against the end wall of the outer cylinder through a supporting frame, so that the inner cylinder is positioned; and first throughholes, second through holes and third through holes, which communicate with an accommodating chamber, are formed in two end walls and the periphery wall of the inner cylinder in the axial direction,so that channels allowing substances to pass in and out of the accommodating chamber are formed in the periphery of the inner cylinder. In the sample preparing process, after reaction liquid of the predetermined capacity is injected into the chamber through a first channel or a second channel, under the action of pressure, the reaction liquid enters into a rock sample in the accommodating chamberin a multi-oriented manner through the first through holes, the second through holes and the third through holes, and is uniformly, relatively quickly and gradually diffused to the inner part of the whole rock sample for reaction, so that the rock sample can be uniformly gelled, and the homogenizing effect is improved.

Description

technical field [0001] The invention relates to the technical field of rock-soil biological reinforcement tests, in particular to a microbial reinforcement reaction device, system and method. Background technique [0002] Microbial mineralization-induced calcium carbonate precipitation (MICP) is a soil reinforcement method developed in recent years, which can significantly improve soil strength, stiffness, permeability, and liquefaction resistance. Technology, it has the characteristics of green environmental protection, environment-friendly, more in line with the concept of sustainable development, has broad application prospects in the field of soil reinforcement. [0003] At present, in the MICP laboratory tests conducted at home and abroad, most researchers inject the liquid mixture of bacterial solution and cementing solution into the sand sample in the reaction device (such as plexiglass column or syringe) or inject the bacterial solution and cementing solution sequent...

AI Technical Summary

Problems solved by technology

One of the main problems of the samples made by these different reinforcement techniques is that during the grouting process, the reaction liquid (that is, the liquid mixture of bacteria liquid and cementing liquid, or the bacteria liquid and cementing liquid injected sequentially) from the reaction device After the injection port at one end of the axis is injected into one end of the sand sample, it diffuses to the other end, and the diffusion process is relatively slow. Therefore, the sand pores near the injection port will be blocked by the generated calcium carbonate crystals first, resulting in the inability of the subsequent reaction liquid to continue. Injection, resulting in uneven distribution of bacterial solution and calcium carbonate in the rock sample, resulting in uneven cementation of the sample and affecting the cementation effect, and it is difficult to completely remove the sample from the reaction device during demoulding, which affects the cementation of the sample. Obstacles to testing of effects and other properties of subsequent samples

Images