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Large-size multifunctional interface dynamic shear tester and test method

A shear test and multi-functional technology, applied in the direction of applying stable shear force to test the strength of materials, instruments, scientific instruments, etc., can solve the problems of difficult research work and lack of test instruments

Active Publication Date: 2018-10-12
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lacking the support of hardware equipment such as test instruments, it is difficult to carry out various research work on the interface shear characteristics of geosynthetics. Geosynthetic interface dynamic shear tester device in test mode

Method used

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  • Large-size multifunctional interface dynamic shear tester and test method
  • Large-size multifunctional interface dynamic shear tester and test method
  • Large-size multifunctional interface dynamic shear tester and test method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] Embodiment 1: Geomembrane-GCL interface dynamic shear test

[0087] Based on the large-scale multifunctional interface dynamic shear tester proposed by the present invention, the working process of carrying out the geomembrane-GCL interface dynamic shear test is mainly divided into three stages: test preparation stage, test progress stage, and test end stage.

[0088] Test preparation stage: First, cut and prepare geomembrane sample 69 and GCL sample 70 according to the size of the upper and lower shear boxes, wherein the size of GCL sample 70 is consistent with the size of the shear box, and the length and width of geomembrane sample 69 are both larger than GCL sample 70; after the sample preparation is completed, turn on the power of each part of the instrument, operate the vertical actuator 19 to shrink, so that the upper shear box 32 is separated from the lower shear box, and leave enough space, through eight upper fixing bolts 60. Firmly fix the upper gripping toot...

Embodiment 2

[0092] Example 2: Geomembrane-clay interface dynamic shear test

[0093] Based on the large-scale multifunctional interface dynamic shear tester proposed by the present invention, the working process of carrying out the geomembrane-clay interface dynamic shear test is mainly divided into three stages: test preparation stage, test progress stage, and test end stage.

[0094] Test preparation stage: First, cut and prepare geomembrane sample 69 and clay sample 71 according to the size of the upper and lower shear boxes. The length and width of geomembrane sample 69 are larger than the size of the shear box. After the sample preparation is completed, turn on the power of each part of the instrument, operate the vertical actuator 19 to shrink, so that the upper shear box 32 is separated from the lower shear box, and leave enough space to pass through the eight upper fixing bolts. 60. Firmly fix the upper gripping tooth plate 56 on the lower surface of the upper shear box 32, and ma...

Embodiment 3

[0098] Embodiment 3: clay direct shear test

[0099] Based on the large-scale multifunctional interface dynamic shear tester proposed by the present invention, the working process of carrying out the clay direct shear test is mainly divided into three stages: the test preparation stage, the test progress stage, and the test end stage.

[0100] Test preparation stage: first, prepare a certain amount of clay sample 71 according to the volume of the upper and lower shear boxes, and the clay sample 71 is prepared by mixing in advance according to the set moisture content; turn on the power of each part of the instrument, and operate the vertical actuator 19 shrinks, the upper shear box 32 is separated from the lower shear box, and there is enough space left; then, unscrew the actuator fixing screw 43 of the fixed horizontal fixed plate 30 and the lower shear box rear bracket 41, and the two are disengaged. Open, the lower shear box is pushed along the horizontal guide rail 17 to t...

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Abstract

The invention provides a large-size multifunctional interface dynamic shear tester and a test method, and belongs to the technical field of geotechnical engineering. The tester comprises an oil sourcesystem, a control system and a shearing system; the shearing system is the main body device for carrying out a shearing test, and the shearing system comprises a main frame, a vertical and horizontalactuator, an up-and-down shearing box, a test auxiliary tool, the vertical and horizontal actuator is respectively connected with the up-and-down shearing box, and the test auxiliary tool comprises atooth grabbing plate, a side limiting frame, a soil grabbing sensor and the like; the oil source system is a power device and is used for providing power to two actuators; the control system is the tester control and the sensor signal collection device, and is used for accurately controlling and monitoring the operation state of the tester. By accurately controlling the motion state of the two actuators, various test functions such as different interface types, test materials and different power shearing modes can be realized, and the defects of the current interface dynamic shear test technical means are filled.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering and earthquake engineering, and in particular relates to a large-scale multifunctional interface dynamic shear tester and a test method. Background technique [0002] Geosynthetics are industrial products made of artificially synthesized polymers (such as plastics, chemical fibers, synthetic rubber, etc.), including: geotextiles, geomembranes, GCL (Geosynthetic Clay Liner), geocomposites, geonets, Fiberglass mesh, geotechnical mat, etc. Geosynthetics are widely used in landfills and the bottom of low-rise building foundations as a liner system to isolate pollutants from leaking or prevent liquid seepage. However, the shear strength of the contact interface of geosynthetics is generally low, and complex relative motions will occur along the interface of the composite liner under the action of earthquake loads. At present, the theoretical research on the dynamic shear characteristi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/24
CPCG01N3/24G01N2203/0025G01N2203/0048
Inventor 冯世进沈阳张冬梅
Owner TONGJI UNIV
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