Visualized crack grouting test device and method for simulating multiple main control variables

Abstract

The invention relates to a grouting test device and a using method, belongs to the field of geotechnical engineering and mining engineering, and particularly discloses a visualized crack grouting testdevice and a visualized crack grouting test method for simulating multiple main control variables. The visualized crack grouting test device comprises a visualized crack grouting platform and a grouting system, wherein the visualized crack grouting platform comprises a crack grouting device consisting of an upper cover layer and a lower bottom plate and having a sealed space; artificial originalrock films are arranged on the opposite surfaces of the upper cover layer and the lower bottom plate respectively; sensors and a grouting hole are formed in the upper cover layer and / or the lower bottom plate; and the grouting system is connected to a liquid injecting hole and is used for injecting a slurry into the sealed space. Through the visualized crack grouting test device and the visualizedcrack grouting test method, the flow law of the slurry in a plate crack during drilling under the condition of different hydrostatic pressures or no water, no medium in the crack or full medium can be simulated, and a quantitative relationship between the diffusion radius of the viscous time-varying grouting slurry and the grouting pressure, the crack opening, the crack dip angle, the crack roughness, the specific gravity of the slurry and the water pressure environment is studied.

Description

technical field [0001] The invention relates to a grouting test device and a use method thereof, belonging to the fields of geotechnical engineering and mining engineering, and in particular to a visual crack grouting test device and method for simulating multiple main control variables. Background technique [0002] In rock and soil grouting engineering, unfavorable geological structures such as joints, cracks, faults, caves, and karst pipes are often encountered. These structures control the permeability and strength of rock and soil, which not only affects the safety of the project, but also makes the grouting The complexity of the project makes the grouting process a "black box" problem, which brings severe challenges to the grouting parameter design, grouting material selection, and grouting effect inspection. The indoor visual grouting simulation test is the most intuitive and effective One of the research methods, by adjusting the main control factors affecting grouti...

AI Technical Summary

Problems solved by technology

[0004] At present, there are the most experiments using a single flat plate fracture to simulate the slurry diffusion law on the dominant fracture surface inside the broken rock and soil, but there are still many shortcomings in this simulation experiment: 1) There is a lack of research on the slurry diffusion and migration law in the original rock or artificial original rock fractures; 2) There is a lack of effective control of the water environment pressure of the aquifer. The existing hydrostatic pressure is generally low, and the hydrostatic pressure is often obtained through the constant head device, which is much lower than the grouting pressure; 3) There is no simulation experiment that considers the grouting pressure, Effects of multiple main control variables such as fracture opening, fracture inclination, fracture roughness, slurry specific gravity, and water pressure environment on slurry migration

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