Pressing-twisting multi-shaft loading testing machine

Abstract

The invention discloses a pressing-twisting multi-shaft loading testing machine. The pressing-twisting multi-shaft loading testing machine comprises a machine frame, a sample pressure chamber, an axial pressure controller, a confining pressure controller and an oil source system, wherein the sample pressure chamber is arranged on the machine frame and is used for accommodating samples therein; the axial pressure controller is used for applying axial loads to the samples in the sample pressure chamber; the confining pressure controller is used for applying confining pressure loads to the samples in the sample pressure chamber; the oil source control system is used for controlling the axial pressure controller and the confining pressure controller respectively to apply different paths of loads; and the axial pressure controller and the confining pressure controller are configured in a mode that the axial force is coupled with the confining force when the loading of the samples in the sample pressure chamber is buffered. The pressing-twisting multi-shaft loading testing machine can integrate complicated loading such as pressing-twisting combination, plane strain, true triaxiality and the like and is suitable for the tests of static power units of the common coarse-grained soil and ideal soil simulation materials during engineering construction.

Description

technical field [0001] The mechanical loading equipment of the present invention particularly relates to a compression-torsion multiaxial loading testing machine applied to the mechanical property test of soil materials and ideal granular materials under complex loading conditions. Background technique [0002] In the field of civil engineering technology, the safety of various engineering constructions mainly depends on the deformation, strength and stability of the engineering materials and structures used. As the most widely used material, foundation or environment in engineering construction, soil is inseparable from the safety of engineering construction. Therefore, the unit test of soil materials is the most basic and important means to evaluate the relationship between deformation strength characteristics and mechanics of soil materials. In the prior art, a conventional triaxial instrument is usually used to test soil materials. However, this triaxial apparatus can ...

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Problems solved by technology

[0004]For example, the hollow cylindrical torsional shear instrument and the true triaxial instrument have been developed to achieve more complex loading conditions, but the hollow cylindrical torsional shear instrument and the true triaxial There are obvious deficiencies in the axis meter

The sample size and the output of the testing machine of the existing hollow cylindrical torsional shear instrument are too small to simulate the ideal granular soil with high stress and various complex loading conditions in actual engineering Materials for Experimental Research

In addition, the existing true triaxial instrument still cannot solve the defects of three-direction motion coupling and uneven stress conditions

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