Fabrication method of soft rock disintegration test specimen under combined action of wet-dry alternation and stress

Abstract

The invention relates to a making method of a soft rock disintegration test sample under joint action of wet-dry alternation and stress. The making method includes steps: (1), determining size of the test sample; (2), making a square die; (3), pre-treating an original rock sample; (4), making cement mortar; (5), wrapping rock with the cement mortar in the die to form a cuboid disintegration test sample; (6), maintaining the sample for 28 days, and demounting the die; (7), after-treating the disintegration test sample; (8), preparing before a disintegration test. When the disintegration test sample is made under the joint action of wet-dry alternation and stress, conventional rock cutting methods cannot process soft rock into regular cuboid samples due to the fact that the soft rock is soft in texture and are low in sample making success rate. Aiming at the problem, the method can make the original sample into a regular cuboid needed for the test and is simple in process, low in cost and high in success rate. The sample made by the method can be used for simulating the soft rock disintegration test under the joint action of wet-dry alternation and stress.

Description

technical field [0001] The invention relates to the field of soft rock disintegration, in particular to a method for preparing a soft rock disintegration test sample under the combined action of wet and dry alternately and stress. Background technique [0002] The disintegration mechanism of rocks in the water level fluctuation zone is an important basis for evaluating the stability of rock mass in wading engineering. Usually, the disintegration process can be simulated and studied through rock laboratory disintegration tests, and the preparation method of rock samples for disintegration tests The rationality of the method, especially the rationality of the preparation method of the rock sample for the soft rock disintegration test, will directly affect the reliability of the test results. In the preparation of traditional rock disintegration samples, the rock sample is usually cut into a cuboid sample, but the soft rock is soft. When the sample is processed by the tradition...

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Problems solved by technology

[0003] In order to solve the traditional cutting method, the soft rock cannot be processed into a regular cuboid sample and the success rate of sample preparation is low, which brings the problem that the disintegration test cannot be carried out under the combined action of wet and dry alternately and stress

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