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Device for testing fracture frost heaving force of rock under vertical load effect

A technology of rock cracks and vertical loads, which is applied in the direction of applying stable tension/pressure to test the strength of materials, measuring devices, instruments, etc., and can solve the problem of poor installation accuracy of thin-film pressure sensors, the inability to consider the crack ice extrusion effect, and the error is difficult to control and other problems, to achieve the effect of simple structure, controllable measurement error and easy operation

Pending Publication Date: 2018-01-26
WUHAN UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

Existing test methods for crack frost-heaving force include photoelastic test technology and thin-film pressure sensor test methods, but due to the limitation of experimental equipment, the extrusion effect of crack ice caused by vertical load cannot be considered. The installation accuracy of the sensor is relatively poor, and the errors of the two measurement methods are also difficult to control

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  • Device for testing fracture frost heaving force of rock under vertical load effect
  • Device for testing fracture frost heaving force of rock under vertical load effect
  • Device for testing fracture frost heaving force of rock under vertical load effect

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Embodiment Construction

[0036] Below in conjunction with accompanying drawing and implementation example the present invention is further described:

[0037] A rock crack frost-heaving test device under the action of a vertical load, comprising a heat-insulating bearing base 1, characterized in that the two sides of the heat-insulating bearing base 1 are respectively connected to the bottoms of two drawer-shaped side wall steel frames 12 Connection, two vertical pressure steel plates 2 are arranged above the heat insulation bearing base 1 and between the two drawer-shaped side wall steel frames 12, and a hydraulic jack 4 is arranged between the two vertical pressure steel plates 2, and two H-shaped empty channel steel support 6, H-shaped empty channel steel support 6 comprises H-shaped support main body 601 and the inner crimp 602 that is arranged on two vertical sides of H-shaped support main body 601, inner crimp 602 and H-shaped support main body 601 A steel plate 8 is clamped between them, and a ...

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Abstract

The invention discloses a device for testing fracture frost heaving force of rock under the vertical load effect. The device comprises a thermal-insulation bearing base, a drawer type side wall steelframe, a vertical pressurization steel plate, a hydraulic jack, a steel plate, a thermal-insulation cover, a cold air delivery pipe, a flaky pressure sensor and a needle-like temperature sensor. The device is simple in structure, convenient to produce and mount and easy to operate; the mounting accuracy of the pressure sensor is high and measurement errors are controllable; the change of water-saturated fracture frost heaving force in multiple rock samples can be measured continuously; an effective experimental method is provided for testing the fracture frost heaving force under the verticalload effect.

Description

technical field [0001] The invention relates to the technical field of rock mechanics tests, in particular to a test device for the frost heaving force of rock cracks under the action of a vertical load. It is suitable for crack frost heaving force measurement of dense rocks such as sandstone and granite and artificial materials such as concrete under vertical load. Background technique [0002] The freeze-thaw damage and fracture of fractured rock mass seriously threaten the safety and stability of rock mass engineering in cold regions. The freeze-thaw damage and fracture of fractured rock mass is mainly the result of the expansion and evolution of crack frost heave caused by crack frost heave force. Engineering rock mass exists in an in-situ stress environment, and external loads, especially vertical loads, will limit the crack frost-heave process, thereby directly affecting the evolution process and magnitude of crack frost-heave force. Therefore, the study of different ...

Claims

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Application Information

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IPC IPC(8): G01N3/18G01N25/14
Inventor 黄诗冰汪雄伟刘艳章李海英刘永涛
Owner WUHAN UNIV OF SCI & TECH
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