Earth material preparation device and method for geotechnical laboratory

Abstract

The invention discloses an earth material preparation device and method for a geotechnical laboratory. The earth material preparation device comprises a rack, a feeding hopper, a crushing mechanism, an earth material conveying plate and a screening mechanism, wherein the crushing mechanism comprises a coarse crushing assembly and a fine crushing assembly, the coarse crushing assembly comprises a first driving roller and a first driven roller which rotate towards each other, a large rolling gap is formed between the first driving roller and the first driven roller, the fine crushing assembly comprises a second driving roller and a second driven roller which rotate towards each other, a small rolling gap is formed between the second driving roller and the second driven roller, the screeningmechanism comprises a vibration assembly and a plurality of stacked screens, the vibration assembly comprises a linear guide rail, a guide rail sliding block and a transmission rod and forms a crank connecting rod transmission mechanism with a second belt pulley, the second belt pulley drives the guide rail sliding block to vertically reciprocate up and down to complete automatic earth material screening, screens with different apertures can be selected according to test requirements to complete automatic grouping of earth material materials with different particle size groups. According to the earth material preparation device and method for the geotechnical laboratory, automatic screening of different particle size groups is achieved while an earth material is crushed, so that the crushing performance of the earth material is good, and the efficiency is high.

Description

technical field [0001] The invention relates to the technical field of geotechnical testing, in particular to a soil material preparation device and method for a geotechnical laboratory. Background technique [0002] Soil mechanics is a science based on experiments, and geotechnical test technology is an effective way to understand the performance mechanism of geotechnical materials and understand engineering characteristics. Among them, the representativeness and rationality of the test soil materials are the primary factors to determine the credibility of the test results. Remodeled soil samples are often used in indoor research, therefore, the preparation of test soil materials becomes the key to the success of the test. Generally speaking, the preparation of test soil materials mainly includes two methods: one is to put the air-dried block soil samples on rubber boards and grind them with wooden rollers as recommended in the standard of soil engineering methods, but on ...

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Problems solved by technology

Generally speaking, the preparation of test soil materials mainly includes two methods: one is to put the air-dried block soil samples on rubber boards and grind them with wooden rollers as recommended in the standard of soil engineering methods, but on the one hand, this method will produce more Large dust, which is not conducive to the health of experimenters, on the other hand, low efficiency, which is not conducive to the development of large-scale or multi-sample tests

The second is to use a soil crushing instrument to crush the air-dried soil samples, but there is no uniform standard for the selection of soil crushing instruments

On the one hand, the strength of soft rock is low, and the use of ordinary crushers for soil crushing generally results in a phenomenon of more small-sized soil materials and less large-sized soil materials. The total amount increases, resulting in waste of funds and soil materials; on the other hand, to carry out large-scale triaxial test research on soft rock generally requires a certain gradation of soil materials in advance, and the preparation of different gradation soil materials needs to be screened out in advance. The gravels of different particle size groups are generally obtained by screening the crushed soil materials with vibrating screens, and the preparation process of soil materials is cumbersome.

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