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Stress path full-automatic hydraulic servo control type rigid-flexible multifunctional triaxial apparatus

A technology of hydraulic servo and stress path, which is applied in the direction of instruments, scientific instruments, strength characteristics, etc., can solve the problems of local stress concentration, achieve the effect of eliminating local stress concentration and realizing highly automatic control and feedback

Inactive Publication Date: 2012-12-12
INST OF MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0005] In addition, another technical problem solved by the present invention is to solve the problem of local stress concentration on heterogeneous materials due to the rigid indenter and rigid base in the traditional triaxial instrument

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  • Stress path full-automatic hydraulic servo control type rigid-flexible multifunctional triaxial apparatus

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Embodiment Construction

[0042] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0043] In order to overcome the limitation that the traditional triaxial instrument can only measure saturated soil-rock mixture materials, the present invention proposes a double pressure chamber scheme and an air pressure control system, which are used to accurately measure the volume deformation of unsaturated soil in compression tests and carry out sample testing. Automatic control of internal pore gas pressure.

[0044] The invention proposes a flexible loading scheme, which uses the indenter and base of the high-pressure liquid capsule to apply uniform stress to the heterogeneous material, and solves the local stress concentration on the inhomogeneous material caused by th...

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Abstract

The invention discloses a stress path full-automatic hydraulic servo control type rigid-flexible multifunctional triaxial apparatus which comprises a loading frame, a double chamber pressure chamber, a base, a pressure head, a loading system, a data measurement and collection device and a control device, wherein the double chamber pressure chamber is arranged at the periphery of a sample, the pressure head and the base are respectively arranged at the upper end and the lower end of the sample, the loading frame is arranged at the outer side of the double chamber pressure chamber, the double chamber pressure chamber comprises an inner pressure chamber and an outer pressure chamber arranged at the periphery of the inner pressure chamber, the loading system is used for carrying out a loading test on the sample, the data measurement and collection device is used for collecting and measuring loading test data, and the control device is respectively connected with the loading system and the data measurement and collection device and used for controlling the loading system and acquiring the loading test data obtained by the data measurement and collection device. With the adoption of the stress path full-automatic hydraulic servo control type rigid-flexible multifunctional triaxial apparatus, accurate measurement of unsaturated soil volume deformation can be carried out.

Description

technical field [0001] The invention relates to the technical field of geotechnical testing, in particular to a stress path fully automatic hydraulic servo control rigid-flexible multifunctional triaxial instrument. Background technique [0002] Triaxial test is a kind of experimental technical means to test the shear strength parameters and deformation mechanical properties of rocks and soils. Traditional large-scale triaxial instruments are generally rigid bases (without ceramic plates), only one pressure chamber, and can only test saturated samples. The volume deformation of the sample is determined by measuring the volume of water discharged during the test; the current large-scale triaxial The instrument has not yet adopted the stress path control technology, and it is difficult to realize the triaxial test under the complex stress path, which limits the application and research scope of the large triaxial instrument. When testing samples such as unsaturated soil-rock ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/00
Inventor 范永波赵红华李世海朱林剑徐志祥刘晓宇侯岳峰
Owner INST OF MECHANICS - CHINESE ACAD OF SCI
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