Device for large-scale true tri-axial test of original grading rockfill body and use method of method

A test device and technology of rockfill body, applied in the field of large-scale true triaxial test device of original graded rockfill body, can solve the problem that test results cannot accurately and comprehensively reflect the mechanical properties of rockfill body, and avoid size effect , the effect of large axial strain

Active Publication Date: 2012-07-25
WUHAN UNIV
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  • Claims
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Problems solved by technology

[0004] The present invention mainly solves the technical problem that the test results in the prior art cannot accurately and comprehensively reflect the mechanical properties of the rockfill body, etc.; it provides a test result that can accurately and comprehensively reflect the mechanical propert

Method used

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  • Device for large-scale true tri-axial test of original grading rockfill body and use method of method
  • Device for large-scale true tri-axial test of original grading rockfill body and use method of method
  • Device for large-scale true tri-axial test of original grading rockfill body and use method of method

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Embodiment

[0023] A large-scale true triaxial test device for an original graded rockfill body, including five measuring components and a fixed component set in a concrete cavern 7 for measuring the strength and deformation characteristics of a rockfill body sample 1, the measurement There are five components, namely the first measuring component, the second measuring component, the third measuring component, the fourth measuring component and the fifth measuring component, the first measuring component, the second measuring component, the third measuring component and the The four measuring components are attached to the four surfaces of the rockfill body sample 1 in turn, and the first measuring component and the second measuring component are symmetrically arranged, the third measuring component and the fourth measuring component are symmetrically arranged, and the fifth measuring component is respectively connected to the The first measuring component, the second measuring component, ...

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Abstract

The invention discloses a large-scale true tri-axial test method and a large-scale true tri-axial test device, which can be used for carrying out the true tri-axial test on an original grading rockfill body. The device is arranged in a concrete cave chamber; six faces of a sample are loaded by rigid slabs; three directional main stress is applied by a hydraulic jack controlled by adopting a hydraulic system; two layers of rubber membranes are sleeved at the inner side of a steel plate so as to reduce friction; silicone grease is coated between the rubber membranes; and rigidity compression plates are respectively provided with a displacement sensor or a dialgage used for determining the deformation of the sample in all directions. The device can be used for testing a large-sized original grading sample of the rockfill body, therefore, the size effect can be completely avoided, larger axial strain can be achieved, and a complicated stress-strain path can be simulated.

Description

technical field [0001] The invention relates to a test device and its use method, in particular to a large-scale true triaxial test device of an original graded rockfill body and its use method. Background technique [0002] Rockfill body is a typical discontinuous granular medium material, which has the advantages of convenient material acquisition and good adaptability, and has been widely used in rockfill dam engineering, coastal engineering, embankment construction and other projects. It is of great significance to study the mechanical properties of rockfill body, exert its strength, control the deformation of engineering structure and improve the design level. [0003] Due to the small sample size of the existing triaxial test equipment, the mechanical properties of the original graded rockfill body are not easy to measure, and the research is generally carried out by reducing the size of the sample, but the scaled test obtained by each method of scaling All of these h...

Claims

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Application Information

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IPC IPC(8): G01N3/08G01N3/02
Inventor 周伟常晓林马刚胡超
Owner WUHAN UNIV
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