Three-dimensional stress loading fractured rock mass splitting-permeation grouting test device and method

Abstract

The invention discloses a three-dimensional stress loading fractured rock mass splitting-permeation grouting test device and method, and is suitable for physical simulation experiment research in theaspect of geotechnical engineering. The device comprises a three-dimensional loading frame, a side pressure isolation telescopic plate, a first main stress pressurizing device, a second main stress pressurizing device, a third main stress pressurizing device, a grouting device and a stress monitoring system. First main stress, second main stress and third main stress are applied to the combined fractured rock mass; two pressurizing liquid bags applying pressure through side pressure are separated through the side pressure isolation telescopic plate, the scalability of the pressurizing liquid bags is combined with the characteristic that the rigidity of an iron isolation plate is small, and the corner effect of the loaded fractured rock mass is perfectly eliminated; the pressurizing liquidbags areadopted to apply side pressure, and therefore the sealing performance of the fractured rock mass is greatly improved; the problems of corner effect and sealing performance in a three-dimensional stress loading rock mass experiment are solved, and the large fractured rock mass formed by splicing the small rock samples has important significance in carrying out the experiment in the presenceor absence of the fractured filling body.

Description

technical field [0001] The invention relates to a grouting test device and method, in particular to a three-dimensional stress-loaded cracked rock mass splitting-infiltration grouting test device and method suitable for physical simulation experiment research in geotechnical engineering. Background technique [0002] The grouting theory is a basic theory under the multidisciplinary interdisciplinary, which mainly involves disciplines such as hydraulics, fractured rock mechanics, fluid mechanics, and consolidation mechanics. Based on the method of grout consolidation, the relationship among related grouting parameters such as grouting radius, grouting pressure, grouting flow rate and grouting gel time is theoretically established. At this stage, the research on the theoretical model of grouting fluid seepage in deep fractured rock mass under complex and high stress state is not perfect and in-depth, and less consideration is given to the three-dimensional stress-slurry seepag...

AI Technical Summary

Problems solved by technology

At this stage, the research on the theoretical model of grouting fluid seepage in deep fractured rock mass under complex and high stress state is not perfect and in-depth, and less consideration is given to the three-dimensional stress-slurry seepage coupling characteristics of fractured rock mass and the opening of cracks during the grouting process. -Expansion-slit width maintenance mechanism

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