A preparation device and method for a rock-soil model test piece

Abstract

The disclosure relates to a preparation device and method for a rock-soil model test piece, which includes a mold barrel, a hammering piece that can be inserted through the opening of the first end of the mold barrel, and a base that is detachably installed at the opening of the second end; it also includes a top The ejection mechanism, the ejection mechanism includes a top cover detachably fixed at the opening of the first end, the top cover is pierced with a ejector rod, driven by the linear drive mechanism, the ejector rod can extend into the mold barrel and move along the central axis of the mold barrel Do reciprocating linear motion. The disclosure can reduce the difficulty of preparing rock-soil model test pieces and improve the preparation quality of the test pieces.

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

Images