Method for preparing soil sample with specific water content by applying automatic soil sample preparation device

Abstract

The invention discloses a method for preparing a soil sample with specific water content by applying an automatic soil sample preparation device. The device comprises a crushing system, a spraying system, a stirring system, a bottom sliding box and a soil containing vessel, the smashing system comprises a sample containing barrel located in the device shell and a cutting mechanism located in the sample containing barrel, a bottom sliding box is installed in the device shell through a rail and located under the sample containing barrel, a weight sensing device is arranged in the bottom sliding box, and a soil containing vessel is placed in the bottom sliding box; a stirring rotating shaft of the stirring system comprises an arc-shaped shaft section, and a stirring rod is arranged on the arc-shaped shaft section. A dried blocky soil sample is poured into a sample containing barrel, then the weight and the water adding amount of the prefabricated soil sample are set through a man-machine interaction screen of a control system, a crushing system firstly crushes the soil sample to fall into a soil containing vessel, water is sprayed after the soil amount is reached, a stirring system is started after the water amount is reached, and after uniform stirring, an arc-shaped shaft section is rotated to be in a horizontal state; and finally pulling out the bottom sliding box and taking out the soil containing vessel.

Description

technical field [0001] The invention belongs to the technical field of indoor geotechnical tests, and in particular relates to a method for preparing soil samples with specific moisture content by using an automatic soil sample preparation device. Background technique [0002] The compaction test refers to a method in which a soil sample is compacted with a hammer to understand the compaction characteristics of the soil. This method is to use different compaction work (hammer weight × drop distance × hammering times) to hammer soil samples with different water contents respectively, and measure the corresponding dry bulk density, so as to obtain the maximum dry bulk density and optimal water content, and thus Provide basis for the design and construction of filling works. [0003] The compaction sample is usually prepared by dry method, that is, take a certain amount of dried soil sample (about 20kg for light type and about 50kg for heavy type), put it on a rubber board and...

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