High pressure true triaxial test system

Abstract

The invention discloses a high pressure true triaxial test system which comprises a first loading device, a second loading device, a true triaxial pressure chamber, a base and a lifting part. The base is provided with a plurality of stages of rails. The first loading device, the second loading device and the true triaxial pressure chamber which are positioned on a plurality of stages of rails canrelatively move on the corresponding rails. One sides of the inner walls of the first loading device and the second loading device are provided with loading devices and the other sides of the inner walls of the first loading device and the second loading device are provided with counterforce devices. The true triaxial pressure chamber can be opened and closed by the lifting part. In the invention, the multistage rail design is adopted; the first loading device, the second loading device and the true triaxial pressure chamber in the system can relatively move; the high pressure true triaxial test system is convenient to install a test sample and a sensor; the influence of the dead weight of a frame on the high pressure true triaxial test system is low; the high pressure true triaxial test system is convenient for the design of the high-load high-rigidity frame; and when a double-axis oil-pressure-free experiment is carried out, real-time observation can be carried out.

Description

technical field [0001] The invention relates to a pressure test system, more specifically to a high-pressure true triaxial test system, which is used to obtain the deformation and failure characteristics of a rock sample under true triaxial stress state. Background technique [0002] The main purpose of rock mechanics test is to simulate the mechanical behavior of rock under natural stress state. As we all know, natural rock mass, especially under the action of tectonic stress, often has different stresses in three directions, and the current popular conventional triaxial test can only simulate the mechanical properties of cylindrical samples with equal intermediate principal stress and minimum principal stress . To simulate the mechanical properties of rock under triaxial stress conditions, a true triaxial testing system (True triaxial testing system: TTS) was used. Most of the true triaxial test samples are rectangular parallelepiped (or cube) with 6 faces, which can be ...

AI Technical Summary

Problems solved by technology

This structure has been improved compared with the first one, and the permeability coefficient can be measured, but there is still the problem of uneven stress distribution in the two directions of the hydraulic cylinder loading, and the four hydraulic cylinders and supporting pipelines and control equipment bring too high cost, and due to the influence of the vertical frame, it is inconvenient to design a frame with high load and high rigidity, and the installation and debugging of the pressure chamber is inconvenient

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