Plane strain triaxial apparatus of axial rolling spacing board

Abstract

The invention discloses a plane strain triaxial apparatus of an axial rolling spacing board. The plane strain triaxial apparatus of the axial rolling spacing board comprises a host part, a loading and measuring mechanism and a collection control mechanism. The host part is structurally characterized in that a base of a pressure chamber is fixedly connected with an axial adjustment piston upward through an axial piston of an axial hydraulic cylinder; the base, a lateral wall and a top cover of the pressure chamber commonly define the pressure chamber; pressure cavities are respectively arranged on the four lateral faces of an inner cavity of the pressure chamber; a sample cap at the axis of the top cover is connected with an axial force sensor upward through a force transmission rod; a contactor of an axial displacement sensor on the force transmission rod is in contact with the upper surface of the top cover; in the inner cavity of the pressure chamber, two hydraulic bags are externally communicated with a pressure source in the loading and measuring mechanism; and sliding restraining mechanisms are respectively arranged in the two pressure cavities along a main middle stress direction in the inner cavity of the pressure chamber. The plane strain triaxial apparatus of the axial rolling spacing board provided by the invention is used for simulating a plane strain stress state.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering testing equipment, and relates to a device for testing soil mechanical properties under plane strain stress conditions, and relates to a plane strain triaxial instrument with an axial rolling limit plate. Background technique [0002] At present, the plane strain triaxial instrument and the true triaxial instrument can realize the test of soil mechanical properties in a complex stress state to a large extent. Strain generation can simulate general stress conditions in soil, but sample preparation and testing are relatively cumbersome, and many geotechnical problems in actual engineering can be approximately simplified to plane strain stress conditions, such as earth-rock dams, embankments, retaining walls and strips Therefore, the development of the plane strain test device is of great significance to the study of soil mechanical properties. [0003] The true triaxial instrument ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a plane strain triaxial instrument with an axial rolling limit plate, which solves the problem that the plane strain stress condition cannot be accurately reflected in the prior art

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