Device and method for on-site torsional shear test of hollow rock cylinder

A technology of hollow cylindrical sample and hollow cylinder, which is applied in the direction of testing material strength by applying stable shear force, can solve problems affecting engineering stability and safety, and property differences, so as to achieve true and reliable experimental results and easy on-site The effect of implementation and reasonable structure of the device

Inactive Publication Date: 2018-12-04
XIAN UNIV OF TECH
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  • Application Information

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Problems solved by technology

At present, due to the lack of instruments and equipment related to on-site testing of hollow cylindrical rock samples, such as on-site sample preparation devices and on-site testing devices, the rock blocks are usually taken back ind

Method used

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  • Device and method for on-site torsional shear test of hollow rock cylinder
  • Device and method for on-site torsional shear test of hollow rock cylinder
  • Device and method for on-site torsional shear test of hollow rock cylinder

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[0021] The present invention will be further described in detail below with reference to the drawings and specific embodiments, but the present invention is not limited to these embodiments.

[0022] The in-situ torsional shear test device for the hollow rock cylinder of the present invention figure 1 As shown, it mainly includes a shaft gland 1 which is in the shape of a disc as a whole, the upper part of which is a cylinder, and the lower part is an inner ring 2 and an outer ring 3 protruding downward. The lower inner and outer rings are matched with the hollow cylindrical sample 4 to be tested, and the hollow cylindrical sample 4 can just extend into and be clamped between the inner and outer rings. A circle of shear bolts 5 is arranged on the concave surface between the inner and outer rings. The position of the shear bolt corresponds to the position of a circle of shear bolt holes provided on the top surface of the hollow cylindrical specimen, and the two are fixed by the she...

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Abstract

The invention discloses a device and a method for an on-site torsional shear test of a hollow rock cylinder. The device comprises a disc-shaped shaft gland, wherein the upper part of the shaft gland is a cylinder; the lower part of the shaft gland is an inner ring and an outer ring which downwardly protrude; a hollow cylinder sample can extend into and be tightly clamped in the area located between the inner ring and the outer ring; a normal loading system, a torsional loading system and an internal-pressure loading system are arranged on the shaft gland; and an axial displacement sensor and an angular displacement sensor are also arranged on the shaft gland. The device and the method provided by the invention can realize the on-site torsional shear field test of a hollow rock cylinder sample, and provide references for research on mechanical properties of rock under complicated stress states and path conditions and for evaluation of the quality of the rock.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering tests, in particular to an on-site torsional shear test device for rock hollow cylinders, and also relates to an on-site torsional shear test method for rock hollow cylinders. Background technique [0002] The torsional shear test of rock hollow cylindrical samples is one of the important methods to study the mechanical properties of rock under complex stress states and paths, and the field rock hollow cylindrical sample test is an important method to study the mechanical properties of rocks under real conditions. At present, due to the lack of instruments and equipment related to on-site testing of hollow cylindrical rock samples, such as on-site sample preparation devices and on-site testing devices, the rock blocks are usually taken back indoors to prepare hollow cylindrical rock samples and then carry out corresponding samples. , such experimental results will bring difference...

Claims

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Application Information

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IPC IPC(8): G01N3/24
CPCG01N3/24
Inventor 张志强郇久阳刘德林
Owner XIAN UNIV OF TECH
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