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Horizontal geotechnical plane stress triaxial apparatus for pressure chamber structure

A technology of plane strain and pressure chamber, which is applied in the field of geotechnical engineering, can solve the problems of difficult control and measurement of pore water and pore air pressure, and achieve the effect of simple and convenient test operation

Active Publication Date: 2013-12-18
XIAN UNIV OF TECH
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Problems solved by technology

[0005] The purpose of the present invention is to provide a geotechnical plane strain triaxial instrument with a horizontal pressure chamber structure, which solves the problem of keeping the principal strain in one direction always zero and the pressure of pore water and pore air in the plane strain triaxial instrument of the prior art. Controlling and measuring difficult-to-control problems

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  • Horizontal geotechnical plane stress triaxial apparatus for pressure chamber structure
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  • Horizontal geotechnical plane stress triaxial apparatus for pressure chamber structure

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Embodiment Construction

[0026] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] The structure of the geotechnical plane strain triaxial instrument with a horizontal pressure chamber structure of the present invention includes three parts: a main machine part, a three-way stress loading and measuring mechanism, and an acquisition control mechanism. Among them, the host part is the core to realize the application of stress on the cuboid sample and the control of drainage conditions. The three-way stress loading and measuring mechanism includes large stress, small stress and medium stress loading and measuring mechanism. Through three sets of hydraulic cylinder mechanisms, large stress, small stress and medium stress are respectively applied to the sample. Each hydraulic cylinder is connected with A set of stepping motor drives the lead screw to push the hydraulic pressure source connection of the hydraulic cylinder ...

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Abstract

The invention discloses a horizontal geotechnical plane stress triaxial apparatus for a pressure chamber structure. The horizontal geotechnical plane stress triaxial apparatus comprises a main machine part, a three-dimensional stress loading and measuring mechanism and a collecting and controlling mechanism. The main machine part structurally comprises four columns fixedly installed on a base, wherein a bottom disc and a top cover are fixedly installed on the upper sections of the four columns, side walls are fixedly connected to four sides of the bottom disc and the top cover, and the bottom disc, the top cover and the four side walls jointly encircle a pressure chamber. A cuboid test sample is placed in the center of an inner cavity of the pressure chamber. The three-dimensional stress loading and measuring mechanism comprises large stress, small stress and intermediate stress loading and measuring mechanisms. According to the device disclosed by the invention, three-dimensional stress, two-dimensional stress and unsaturated three-dimensional stress can be obtained through a plane stress triaxial test, and the stresses do not interfere with each other. Study on shear zones and local deformation of the plane stress test is realized. The mechanical property and strength deformation mechanism of non-saturated soil can be searched under the condition of a plane stress path.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, and relates to a geotechnical plane strain triaxial instrument with a horizontal pressure chamber structure. Background technique [0002] Existing soil mechanical property testing equipment mainly includes direct shear instrument, conventional triaxial instrument, true triaxial instrument and plane strain triaxial instrument. Among them, the direct shear instrument simulates the normal stress and tangential stress on the given shear plane, and can test the shear stress and shear strain on the shear plane, but cannot control the drainage conditions; the conventional triaxial instrument simulates the axisymmetric stress condition, The test of soil mechanical properties under general stress conditions cannot be realized; the true triaxial instrument can realize the simulation of general stress conditions in soil, but for many plane strain boundary value problems, the true triaxial ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/00G01N3/24
Inventor 邵生俊罗爱忠潘德勇王晓峰马林
Owner XIAN UNIV OF TECH
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