High-airtightness sample preparation device and sample preparation method thereof

Abstract

The invention discloses a high-airtightness sample preparation device which comprises a base, multiple arc-shaped tile molds, a hood, a compaction guide rod and a clamping device, wherein the multiple arc-shaped tile molds are butted to form a barrel, the barrel sleeves a boss of a base, the hood is arranged at the top end of the barrel, a rubber membrane is lined at the inner side of the barrel, the multiple arc-shaped tile molds have air exhaust holes, the air exhaust holes are provided with rubber pipette bulbs, the rubber membrane sleeves the boss of the base and is tightly hooped, the lower end of the compaction guide rod is provided with a round compaction head, the compaction guide rod is provided with a clamping plate, the clamping device is composed of two semi-circular plates, a round insertion hole is formed in the center of each pedal of semi-circular plate, a compaction hammer sleeves the compaction guide rod, water-permeable stone is arranged on the base, an airtight space is defined by the barrel and the rubber membrane, internal pressure passages are formed on the base and the hood and are communicated with the inner cavity defined by the rubber membrane. A sample prepared by the device provided by the invention is uniform and has a size strictly meeting requirements, the device is convenient to operate and the compactness of the sample can be easily controlled. The invention further provides a method for preparing a sample by adopting the high-airtightness sample preparation device.

Description

technical field [0001] The invention relates to a high-tight sample preparation device, which belongs to indoor soil mechanics test equipment, and particularly relates to the preparation of granular material samples such as sandy soil and silty soil. The present invention also relates to a sample preparation method using the above-mentioned high-seal sample preparation device. Background technique [0002] At present, in the indoor soil mechanics unit test, sample preparation is the key to the success of the test. For commonly used test instruments such as triaxial instruments and resonance columns, it is often necessary to prepare cylindrical samples, and the size of the samples is standard and relatively dense. Degree control and uniformity have a very important impact on test results. In the test, the rubber film used in the sample preparation needs to be supported by the rigid mold to fill the sample. Therefore, it is particularly necessary to make the rubber film close...

AI Technical Summary

Problems solved by technology

[0004] In addition, due to the traditional artificial operation of sample preparation has a great influence on the uniformity of the sample, the samples prepared by different personnel are not the same, and the repeatability of the test results has a high dependence on the proficiency of the test personnel.

[0005] In summary, currently known sand sample preparation molds generally have insufficient airtightness, and must rely on a continuous negative pressure system to prepare ideal samples.

And the uniformity of the sample and the repeatability of the test results have a high dependence on the test personnel

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