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Geologic body structural surface stress-fluid coupling shearing rheological system

A structural surface and seepage technology, applied in the direction of applying a stable shear force to test material strength, permeability/surface area analysis, and measurement devices, can solve problems such as inability to perform rheological conditions, and increase the maximum shear load Strength, good sealing effect, and the effect of improving the overall stability

Active Publication Date: 2017-05-31
INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The purpose of the present invention is to provide a stress-seepage coupled shear rheological system on structural surfaces of geological bodies. In view of the shortcomings that current test equipment cannot perform shear-seepage tests under rheological conditions, this test system can perform different structural surface tests. Shear rheological test under stress-seepage coupling conditions, realize structural surface shear tests under different servo control methods, and dynamic tracking measurement of permeability under structural surface stress-permeation coupling conditions

Method used

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  • Geologic body structural surface stress-fluid coupling shearing rheological system
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  • Geologic body structural surface stress-fluid coupling shearing rheological system

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Embodiment

[0083] A stress-seepage coupled shear rheological system on a structural surface of a geological body, comprising: a normal loading system for applying a normal load to a rock specimen; a shear box 200, which includes a box internally configured to accommodate Body accommodating portion 201, the two sides of box body accommodating portion 201 are box body connecting portion 202, the inner wall size of box body connecting portion 202 is larger than the inner wall size of box body accommodating portion 201; The rubber sleeve receiving part 301 on the outer surface of the test piece, the rubber sleeve connecting part 302 is on both sides of the rubber sleeve receiving part 301, the outer peripheral size of the rubber sleeve connecting part 302 matches the inner wall size of the box body connecting part 202; the shear loading system , including two mutually staggered active loading ends 401 arranged in the shear box 200 to apply shear force to both sides of the rock sample, the act...

specific Embodiment approach

[0128] The normal servo loading system and shear servo control system adopt EDC full digital servo controller imported from German DOLI company, which can control force, displacement and deformation. The servo loading system is mainly used to realize the shear rheological test of rock joints under the condition of stress and seepage coupling, including normal loading and shear loading. Different servo control methods for vertical stress (CNL) and constant normal displacement (CNV). The main technical indicators of the normal loading part are: the maximum normal test force 1000kN; the test force measurement accuracy (within the range of 5% to 100% of the full scale) ≤ ± 1% of the indicated value; the normal actuator travel range 0 -100mm; actuator displacement measurement accuracy is <±1% of indication value; axial test force loading rate is 0.01~100kN / s, accuracy ≤±1% of indication value; deformation measurement in normal direction is 25mm four displacement sensors , measurem...

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Abstract

The invention discloses a geologic body structural surface stress-fluid coupling shearing rheological system which comprises a normal loading system, a shearing box, a sealing rubber sleeve, a shearing loading system and a seepage pressure loading system, wherein the shearing box comprises a box accommodation part for accommodating a rock test part inside; box body connecting parts are arranged on two sides of the shearing box; the size of the inner wall of each box body connecting part is greater than that of the inner wall of the box body accommodation part; the sealing rubber sleeve comprises a rubber sleeve accommodation part; rubber sleeve connecting parts are arranged on two sides of the rubber sleeve accommodation part; the size of the outer circumference of the rubber sleeve connecting part is matched with that of the inner wall of the box body connecting part; the shearing loading system comprises two active loading ends which are staggered from each other inside the shearing box; the active loading ends are controlled by hydraulic systems; the hydraulic systems are used for controlling that piston chambers for exerting force to the active loading ends are in sealed connection with the box body connecting parts on two sides of the shearing box through shearing connecting parts; the sealing rubber sleeves are pressed to the inner wall of the shearing box through the shearing connecting parts; the seepage pressure loading system comprises a seepage hole which is communicated with the end surface of the rock test part; a seepage pressure pump is used for exerting seepage pressure to the rock test part through the seepage pressure hole.

Description

technical field [0001] The invention relates to the technical field of experimental measuring instruments, and more particularly relates to a stress-seepage-flow coupled shear rheology system on a structural surface of a geological body. Background technique [0002] In mining, nuclear waste disposal, water conservancy and hydropower, tunnels, slopes and other underground projects, fractured rock mass is a type of complex rock mass that is often encountered. Its strength, deformation and permeability are directly related to engineering design, Construction and operational stability, and these properties have significant time dependencies. The shear rheology of fractured rock mass is often the main factor that causes rock engineering accidents such as rock mass landslide, surrounding rock collapse, and underground engineering instability. Therefore, it is of great guiding value for the long-term stability of the entire rock mass engineering to carry out experimental research...

Claims

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Application Information

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IPC IPC(8): G01N15/08G01N3/24G01N3/02
CPCG01N3/02G01N3/24G01N15/082G01N2203/0025G01N2203/0048
Inventor 陈卫忠杨典森王鲁瑀杨建平
Owner INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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