Hollow cylinder test system suitable for unsaturated soil
A hollow cylinder and test system technology, applied in the direction of applying stable tension/compression to test the strength of materials, preparation of test samples, etc., can solve the problems that cannot be carried out, the research on the strength and deformation characteristics of unsaturated soil, and the principal stress axis cannot be considered Problems such as the influence of rotation can be solved to achieve the effect of promoting development, reasonable device structure setting, and convenient use
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[0025] The present invention will be described in detail below with reference to the drawings and specific embodiments.
[0026] A hollow cylinder test system suitable for unsaturated soils, including: axial and torsion drive device, hollow cylinder pressure chamber, internal and external confining pressure, air pressure and back pressure controller; signal conditioning device, digital control system and computer control system .
[0027] The axial and torsion drive device is composed of an axial (torsion) motor and a driver, and includes two brushless DC servo motors that drive a ball screw and a spline shaft through a toothed belt.
[0028] The hollow cylindrical pressure chamber base is fixed on the top of the driving device, and the hollow cylindrical pressure chamber base includes internal and peripheral pressure, air pressure and back pressure connecting pipelines and is connected with internal and peripheral pressure, air pressure and pore water pressure sensors. The top seat...
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