Triaxial test apparatus and method suitable for weak rocks

Abstract

The invention relates to a triaxial test apparatus and method suitable for weak rocks. The apparatus mainly comprises a pedestal, and the pedestal is fixedly connected with a support; the top of the support is fixedly connected with a Z-axial stress loading mechanism; the lower portion of the support supports an X-axial stress loading mechanism and a Y-axial stress loading mechanism; the X-axial stress loading mechanism is positioned above the Y-axial stress loading mechanism; and the X-axial stress loading mechanism and the Y-axial stress loading mechanism are respectively provided with pressurizing plates driven by a leading screw pair. The structure of the apparatus is brand new, and triaxial pressurization is carried out in a mono-axial oil cylinder and biaxial oil cylinder loading mechanism combination form o realize very accurate control of the loading force, so the mechanical attribute researches of the soft rocks are realized.

Description

technical field [0001] The invention relates to the relevant technical fields of mechanical engineering and geotechnical engineering, in particular to a triaxial test device and method suitable for weak rocks. Background technique [0002] With the development and utilization of underground space, there are more and more excavations of deep-buried ultra-long-span tunnels, large-scale underground powerhouses in hydropower projects, and steep and high rock artificial slopes. The failure mechanism of rock mass under three-dimensional stress state Research has become a hot spot in the field of rock mechanics and engineering. [0003] In the indoor experiment, three axial pressures were applied to the rock specimen by the rock triaxial testing machine, and the mechanical behavior of the rock was observed and recorded. Conventional rock triaxial testing machines are expensive and costly, and the related equipment occupies a large area and requires a large laboratory. At the same ...

AI Technical Summary

Problems solved by technology

Conventional rock triaxial testing machines are expensive and costly, and the related equipment occupies a large area and requires a large laboratory. At the same time, the test machine is heavy and difficult to move

[0004] The rock triaxial testing machine can obtain the mechanical properties of most rock materials through triaxial loading, and in the pressure test of rocks and rocks with weak and broken materials, due to the weakness of some rock materials, the rocks and rocks will will be crushed, so the conventional three-axis cylinder pressurized testing machine is not easy to collect the mechanical parameters of weak and broken rock specimens

However, the indoor test equipment limits the size of the sample. Therefore, it is necessary to solve the problem of triaxial test equipment that can carry out different sample sizes and reduce the current sample size span.

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