Preparation device and preparation method of crack-containing test piece
A technology for preparing devices and test pieces, which is applied in the field of geotechnical engineering, can solve problems such as fissures, sheet fissures, coal and rock mass fissures that cannot meet the design requirements, and achieve the effect of simple device configuration and easy operation
Pending Publication Date: 2020-08-18
CCTEG CHINA COAL RES INST
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Problems solved by technology
[0003] In order to solve the technical problem that the cracks of the coal rock mass containing joints and cracks cannot meet the design requirements and the existing cracks are all flaky cracks, the present invention provides a preparation device and method for test pieces containing pores and cracks, which can It is suitable for the production of cracked test pieces simulating various natural materials such as coal, rock and concrete. The device is simple in structure and easy to operate.
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[0026] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention, that is, the described embodiments are only some of the embodiments of the present invention, but not all of the embodiments.
[0027] The present invention is described in detail below in conjunction with accompanying drawing
[0028] A preparation device for a sample containing pores and fissures, the preparation device includes a cylinder 2, a fixed ring 1, a fixed piece 3, a fixed net 8 and a temperature-sensitive water-soluble line 5, the cylinder is cylindrical with two ends open, The fixed plate 3 at the bottom of the cylinder, the first fixed net 8 and the bottom of the cylinder are fixedly connected ...
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The invention relates to a preparation device and a preparation method of a crack-containing test piece. The device comprises a cylinder, a fixing ring, a fixing sheet, a fixing net, a temperature sensing water soluble line and the like. The characteristic that the temperature-sensitive water soluble line is dissolved in water at a specific temperature is utilized, and the temperature-sensitive water soluble line is used for simulating cracks. The method comprises the following steps: fixing a temperature-sensitive water-soluble line in a mold according to crack parameters, filling the mold with concrete, demolding after the concrete is completely solidified, immersing a test piece in water, controlling the water temperature to be higher than the dissolving temperature of the temperature-sensitive water-soluble line, and after the temperature-sensitive water-soluble line is dissolved in water, obtaining a vacant space, namely a crack. The device is simple in structure and easy and convenient to operate, cracks are simulated through the temperature-sensitive water soluble line, and it can be guaranteed that the manufactured cracks completely meet the design requirement.
Description
technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a preparation device and a preparation method of a test piece containing pores and fissures. Background technique [0002] There are a large number of joints and fissures in natural coal and rock mass. In order to simplify the variables when carrying out related research in the laboratory, test pieces containing joints and fissures will be made to simulate natural coal and rock mass. Currently, it is common practice to make coal and rock mass with joints and fissures Yes: Make a square or round mold, place metal sheets or other materials in a specific position of the mold, inject concrete or similar materials into the mold, take out the metal sheet when the filling material is about to solidify, and use the space after the metal sheet is taken out to simulate natural coal rock body fissures. The disadvantage of this method is: it is difficult to grasp the time o...
Claims
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IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 孙中学李宏艳舒龙勇郝晋伟王维华崔聪张慧杰
Owner CCTEG CHINA COAL RES INST