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Tension-compression-torsion-shearing coupling-based stress path triaxial apparatus

A stress path and triaxial instrument technology, which is applied in instruments, scientific instruments, measuring devices, etc., can solve the problems of simple test stress paths, inability to perform tensile-torsional (shear) strength testing functions, and single instrument functions, etc. The effect of experimental error, convenient and reliable data collection, good applicability

Active Publication Date: 2013-06-12
XIAN UNIV OF TECH
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Problems solved by technology

[0006] The purpose of the present invention is to provide a stress path triaxial instrument based on tension-compression torsional-shear coupling, which solves the problem of single instrument function, too simple test stress path and inability to complete the sample in the prior art soil strength testing equipment. Problems with the tensile torsion (shear) strength test function

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Embodiment Construction

[0033] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] The structure of the device of the present invention is, as figure 1 , figure 2 As shown, it includes a box body 2. The box body 2 is arranged on the upper surface of the base 1. A motor platform 3 is installed in the box body 2. A liftable torque motor 4 is installed at the center of the motor platform 3. The torque motor 4 and the torque motor control 5 signal connection, the left instrument platform 6 and the right instrument platform 7 are respectively fixed on both sides inside the box body 2, the upper and lower surfaces of the left instrument platform 6 are respectively installed with a confining water supply and drainage controller 13 and The angular displacement display instrument 8 is equipped with a torque display instrument 14 at the end of the left instrument platform 6; a confining pressure loading measuring instrument ...

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Abstract

The invention discloses a tension-compression-torsion-shearing coupling-based stress path triaxial apparatus. An axial force loading shaft is arranged at the upper part of a triaxial pressure chamber, and a torsion transmission shaft is arranged on a base of the lower part of the triaxial pressure chamber; a digital readout push-pull sensor and a displacement sensor are arranged on the axial force loading shaft; a torque sensor, a display instrument, an absolute type angular displacement sensor and an angular displacement display instrument are arranged simultaneously on the torque transmission shaft of the base at the lower part of the instrument; and by adopting the function of automatically supplying and discharging liquid in the pressure chamber, a confining pressure water supplying and discharging controller is used for feeding and discharging water to the interior of the pressure chamber. The invention not only provides a feasible testing apparatus for determining the strength characteristic of cylindrical soil samples under the conditions of tension, compression, torsion, shearing and combination thereof in the case of having no confining pressure or having confining pressure, but also obviously improves the testing reliability.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering testing, and is a strength test device for stress paths of soil tension, compression, torsional shear and their coupling, and relates to a stress path triaxial instrument based on tension, compression, torsional shear coupling. Background technique [0002] Soil is the product of the evolution process of geological action, which has the characteristics of multi-phase dispersed system, and also has the characteristics of diversity of types, and its properties are complex and changeable. Soil differs from other building materials such as metals, concrete and plastics in their relative stability and normalization. For the same type of soil, different types of instruments may be used to measure different results, and even if the same type of instrument is used, different test methods and techniques will also produce large differences. Therefore, in the geotechnical test, due to the t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/00G01N3/02
Inventor 李荣建刘军定李海涛吴利言
Owner XIAN UNIV OF TECH
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