Preparation device and method for rock-soil model test piece

Abstract

The invention relates to a preparation device and method for a rock-soil model test piece. The preparation device comprises a mold barrel, a hammering piece capable of being inserted from an opening in the first end of the mold barrel, and a base detachably installed at an opening in the second end of the mold barrel. The device further comprises an ejection mechanism, the ejection mechanism comprises a top cover detachably fixed to the opening of the first end, an ejection rod is arranged in the top cover in a penetrating mode, and the ejection rod can be driven by a linear driving mechanism to stretch into the mold barrel and do reciprocating linear motion along the central axis of the mold barrel. The preparation difficulty of the rock-soil model test piece can be reduced, and the preparation quality of the test piece is improved.

Description

technical field [0001] The disclosure belongs to the technical field of geotechnical engineering, and in particular relates to a preparation device and method for a geotechnical model test piece. Background technique [0002] The statements herein merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] The model test has become one of the important scientific research methods in the field of geotechnical engineering. In the model test, whether it can be equipped with good similar materials, and then make the test piece is related to the success or failure of the model test. In order to find a suitable material mix ratio, it is necessary to prepare test pieces with different material mix ratios for various physical and mechanical property tests such as compressive strength tests. [0004] The test pieces are usually made of quartz sand, calcium carbonate, iron powder, gypsum powder, barium sulfate and othe...

AI Technical Summary

Problems solved by technology

[0005] The inventors have learned that the existing molds for cylindrical test pieces often adopt the form of two semi-cylindrical side walls that are fixed on the bottom plate after being hooped by cylinder hoops. It is difficult to remove the cylindrical hoop during the demoulding process, and the knocking method adopted to loosen the cylindrical hoop is likely to cause cracks inside the specimen and split the specimen in two

[0006] At the same time, in the process of compaction, the proportioning material of liquid nature is easy to seep out along the gap between the half cylinders, thus causing the proportioning change of similar materials

In the process of separating the side walls of the two molds, the similar material of the test piece is easy to adhere to the side wall of the mold after tamping, and it is very easy to crack the edge of the test piece when demoulding

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