Up-down opening type 120MPa-resistant ultrahigh pressure true triaxial pressure test apparatus and method

Abstract

The invention provides an up-down opening type 120MPa-resistant ultrahigh pressure true triaxial pressure test apparatus and method. The up-down opening type 120MPa-resistant ultrahigh pressure true triaxial pressure test apparatus comprises a pressure chamber main body, a pressure chamber base, a first self-balancer piston, a second self-balancer piston, a third self-balancer piston, a fourth self-balancer piston and a semicircular fixture; the first self-balancer piston and the second self-balancer piston are correspondingly arranged on the two sides of the pressure chamber main body; the fourth self-balancer piston is arranged at the upper end of the pressure chamber main body; the lower end of the pressure chamber main body is provided with the pressure chamber base through the semicircular fixture; and the third self-balancer piston is arranged on the pressure chamber base. The design and manufacturing of four actuators are adopted in the vertical direction, pressure chamber flexible loading is adopted in the minimum principal stress direction, and the optimal conditions are provided for design, manufacturing and control characteristic research of a true triaxial multi-axis multi-actuator.

Description

technical field [0001] The present disclosure belongs to the technical field of true triaxial test equipment of geotechnical mechanics, and in particular relates to an up and down opening type super-high pressure true triaxial pressure test equipment and method of 120 MPa. Background technique [0002] In the field of deep rock engineering and deep mining engineering, it is often necessary to perform compression loading mechanical tests on rock specimens; the true triaxial rock test system can simulate the mechanical properties of rocks under the condition of unequal three-dimensional stress; different from shallow rock engineering, Deep engineering construction is faced with the threat of engineering disasters such as rock bursts, landslides, deep fractures and large deformations caused by true triaxial high in-situ stress (σ1>σ2>σ3). Therefore, it can better explain the mechanical behavior and mechanism of rock deformation and failure under natural stress state. The...

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Problems solved by technology

[0003] The inventors of the present disclosure found that: 1. The currently developed true triaxial testing machines mostly adopt rigid loading in two directions, flexible loading in one direction and three-rigid loading, and there is a problem that the loading effect is not ideal; 2. Conventional pressure chambers mostly use front and rear opening There are many working windows in the type pressure chamber, which reduces the pressure resistance performance of the pressure chamber

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