Test device capable of making multiple cracks and regulating and controlling crack arrangement mode and method

Abstract

The invention discloses a test device capable of making multiple cracks and regulating and controlling the arrangement mode of the cracks. The single test device solves the problem that the number andthe spatial arrangement mode of premade through cracks cannot be changed at any time in the prior art, and has wide applicability and flexibility for making of the through cracks. Requirements of different test schemes can be met simultaneously, and the cost of test equipment is reduced to a certain extent; the test device is embedded in the surface of a base by strip-shaped plasticine, and the problem of time consumption in later cleaning of the test device is effectively solved; besides, small holes reserved in side plates of the test device can be used for crack water injection tests.

Description

technical field [0001] The invention relates to a prefabricated test device for penetrating cracks of standard cement mortar specimens, in particular to a test device capable of producing a plurality of penetrating cracks and an adjustable arrangement, belonging to the field of geotechnical engineering materials. Background technique [0002] Since the reform and opening up, with the continuous development of my country's mining, water conservancy, energy and national defense industries, the development of large-scale rock and soil underground projects has also increased. The existence of structural planes brings unstable factors to the safety of underground engineering. Therefore, for large-scale underground engineering, the study of crack propagation mechanism has important guiding significance and practical needs. [0003] Laboratory test is one of the effective means to study the mechanical properties of fractured rock mass and the mechanism of crack propagation. At prese...

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Problems solved by technology

[0003] Laboratory test is one of the effective means to study the mechanical properties of fractured rock mass and the mechanism of crack propagation. At present, domestic research is mainly carried out on two-dimensional penetrating cracks and three-dimensional built-in cracks. For three-dimensional built-in cracks, the crack initiation angle of built-in cracks It is inconvenient to directly measure the length and length of crack growth, and the phenomenon of secondary crack growth does not appear. Therefore, two-dimensional through-crack laboratory experiments are often carried out. However, for each fixed experimental device, the number of cracks formed when pouring specimens and the The spatial arrangement of the test plan is fixed. Once the experimental plan is slightly changed, it will cause a dilemma that the test plan cannot meet the requirements of multi-slit production and different space arrangements.

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