Rock mass three-dimensional seepage characteristic determination test device and rock mass three-dimensional seepage characteristic determination test method

Abstract

The invention relates to a rock mass three-dimensional seepage characteristic determination test device and a rock mass three-dimensional seepage characteristic determination test method, which are developed for solving the problem of rock mass three-dimensional seepage characteristics. The device comprises a pressure stabilization servo system, a sealing system arranged on the side length of a rock mass test piece, three water supply loading systems in different directions, a stress-strain and displacement observation system arranged on the surface of the rock mass test piece, and a data acquisition system. According to the invention, the existing high-pressure water sump device is fully utilized, the limitation that the conventional rock mass hydraulics test research is generally limited to the indoor test of a single seepage path and a rock mass small-scale test piece is broken through, and the seepage pressure gradients, seepage flows and rock mass test piece deformation of the rock mass test piece in three different directions can be simultaneously measured under a certain water pressure condition; through three-time one-inlet and three-outlet seepage tests on the rock mass test piece, the seepage tensor component of the rock mass can be solved, then three main seepage coefficients and directions of the rock mass can be solved through simultaneous solution, and the method has important theoretical value and engineering practical significance.

Description

technical field [0001] The invention relates to the technical field of rock mass seepage tests, in particular to a test device and method for measuring three-dimensional seepage characteristics of rock mass. Background technique [0002] The study of seepage in rock mass started in the 1940s. In 1966, Romm published "Permeability Characteristics of Fractured Rocks". American scholar Snow proposed a fractured plate seepage model. French scholar Louis proposed a three-stage water pressure test method for fractured rocks. Hydraulics" term and published a long paper. In a nutshell, the research results represented by these three European and American scholars laid the theoretical foundation for rock hydraulics. Since then, a large number of foreign scholars have invested in this research. my country also opened the prelude to rock hydraulics research in the early 1980s. Relevant professional universities and scientific research institutions, including Wuhan University, Hohai U...

AI Technical Summary

Problems solved by technology

[0008] In the above-mentioned rock mass fracture hydraulic test research, most of the indoor tests are single-crack and small-scale specimens, and most of the seepage-stress tests are under normal stress conditions. The geometry of the fracture surface is not representative enough, and the measured permeability tensor Basically, they are plane permeability tensors, not real three-dimensional permeability tensors of rock mass

There is a lack of research on the hydraulic seepage characteristics of three-dimensional rock mass specimens under certain water pressure conditions, especially the research on the seepage characteristics of surrounding rocks during water storage (water passage) of dams and pressurized diversion tunnels in the water conservancy industry

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