Mold for preparing test piece of geotechnical model and preparation method

Abstract

The invention discloses a mold for preparing a test piece of a geotechnical model and a preparation method, solves the problems in the prior art that the molds preparing test pieces are complicated instructure, and the uniformity and compactness of the test pieces cannot be guaranteed, and has the beneficial effects of effectively guaranteeing the compactness of the prepared test pieces and effectively facilitating the later demoulding. The solution is that the mold for preparing the test piece of the geotechnical model comprises a test piece cylinder for filling materials similar to the testpiece and mold support frames erected around the test piece cylinder, wherein a pressing plate is provided in the test piece cylinder and is connected to a pushing level running through one end surface of the test piece cylinder, and the other end surface of the test piece cylinder is opened; the test piece cylinder can realize movement along the inner side of the mold support frames under external force, and the mold support frames are detachably connected to the pushing level to realize adjustable height of the pushing level inserted into the test piece cylinder, so that the pushing level and the pressing plate perform vibration effect on one side of the material similar to the test piece in the test piece cylinder.

Description

technical field

[0001] The invention relates to the fields of geotechnical engineering and tunnel engineering, in particular to a mold for preparing rock and soil model test specimens and a preparation method. Background technique

[0002] Model testing has become one of the commonly used scientific research methods in geotechnical engineering, tunnel engineering and other disciplines. Equipping qualified specimens with similar materials is an important basis for the success of model testing. In order to find a suitable material mix ratio, it is necessary to prepare different materials. Various physical and mechanical properties tests such as compressive strength test and elastic modulus test were carried out on the test pieces with the mix ratio.

[0003] The test pieces are usually made of fine sand, calcium carbonate, iron powder, gypsum powder and other materials as aggregates, white cement, chlorinated paraffin, vaseline, water glass and other materials are used as ceme...

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