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Triaxial test device

A triaxial test and friction device technology, applied in soil material testing, material inspection products, etc., can solve problems such as axial deformation, and achieve the effect of uniform diameter change and accurate stress calculation

Inactive Publication Date: 2015-02-11
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a triaxial test device to solve the problem of axial deformation of the sample due to the action of the permeable stone

Method used

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Embodiment Construction

[0014] A triaxial test device proposed by the present invention will be described in further detail below in conjunction with the accompanying drawings and specific examples. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that all the drawings are in very simplified form and use imprecise ratios, which are only used for the purpose of conveniently and clearly assisting in describing the embodiments of the present invention.

[0015] The core idea of ​​the present invention is that, in the triaxial test device provided by the present invention, the elastic film arranged at both ends of the triaxial sample can slide relative to the anti-friction plate, thereby reducing or offsetting the lateral constraints on the two ends of the triaxial sample The friction force makes the two ends of the triaxial sample slide laterally when the axial force is applied, and finally makes the diameter change of the tr...

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Abstract

The invention provides a triaxial test device which comprises a base, a water permeable stone, elastic membranes and an anti-friction plate, wherein the base is used for placing test samples; the water permeable stone is placed on the base; the elastic membranes and the anti-friction plate are sequentially arranged between the test sample and the water permeable stone; lubricating oil is coated between the elastic membranes and the anti-friction plate which form an anti-friction device; and the anti-friction device is provided with a water permeable structure. According to the triaxial test device provided by the invention, the elastic membranes arranged at two ends of a triaxial test sample can slide relative to the anti-friction plate, so that the lateral restraint friction force at two ends of the triaxial test sample is reduced or counteracted, and the lateral slide is generated at two ends when the triaxial test sample is stressed axially, finally the diameter of the triaxial test sample within the integral height range changes uniformly, and the stress calculation is accurate.

Description

technical field [0001] The invention relates to the field of engineering material testing instruments, in particular to a triaxial testing device. Background technique [0002] Indoor tests can obtain various physical and mechanical parameters of soil samples, which can provide a basis for engineering design or numerical simulation. [0003] The triaxial test involved in the indoor test has a wide range of applications, and can be used to measure the strength parameters, stress-deformation parameters, dissipation coefficient, static lateral pressure coefficient and permeability coefficient of the soil. The triaxial test is suitable for various soil types, such as undisturbed soil, cohesive soil and gravel of remolded soil, etc.; however, the disadvantage of the triaxial test is that the permeable stone is in direct contact with the sample. Due to the high friction of the permeable stone, if The upper and lower ends of the sample do not take measures to reduce friction, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24
Inventor 尹振宇朱启银金银富李艳玲夏云龙
Owner SHANGHAI JIAOTONG UNIV
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