Semiautomatic hollow column soil sample making device

Abstract

The invention discloses a semiautomatic hollow column soil sample making device and belongs to the field of related geotechnical engineering. The invention provides the semiautomatic hollow column soil sample making device which comprises a fixing cover plate, a soil cutting iron wire, a middle partition plate, a soil cutting iron wire holder, a tray, a first stepper motor, a second stepper motor,a third stepper motor, a PLC (Programmable Logic Controller), a soil taking cylinder, and the like, wherein the first stepper motor, the second stepper motor and the third stepper motor are all connected with the PLC; two ends of the soil cutting iron wire are connected with the soil cutting iron wire holder; the iron wire can be moved up and down automatically; the holder can also be moved forwards and backwards automatically; the tray is used for controlling the rotation of a soil sample to be cut; the soil taking cylinder can be moved up and down and rotated. As a semiautomatic device, thedevice is very simple and convenient to operate and high in soil taking precision, the time and the labor can be greatly saved for experiment operators, and the problem of devices for semiautomatic hollow column soil sample making can be solved.

Description

technical field [0001] The invention relates to a semi-automatic hollow cylindrical soil sample production device, which belongs to the related field of soil mechanical performance testing in geotechnical engineering. Background technique [0002] With the development of my country's economy, the society's demand for transportation continues to increase. However, land and ground resources are limited. Making full use of underground space and building submarine tunnels has become a new idea to solve the limited land and ground resources. However, it is necessary to do a good job in the development of underground space. The mechanical shape of the soil needs to be studied. The most common dynamic loads that the soil bears are earthquake loads, vehicle loads, and wave loads, etc., and the stress paths of the soil under these loads are mostly complex stress paths involving the rotation of the principal stress axis. The hollow cylindrical torsional shear instrument (HCA ) is the ...

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Problems solved by technology

The most common dynamic loads that the soil bears are earthquake loads, vehicle loads, and wave loads, etc., and the stress paths of the soil under these loads are mostly complex stress paths involving the rotation of the principal stress axis. The hollow cylindrical torsional shear instrument (HCA ) is the most advanced geotechnical test equipment that can realize multiple complex stress paths including the rotation of the principal stress axis. The soil sample of this instrument is a hollow cylindrical soil sample. The quality of the soil sample directly affects the accuracy of the test results. At present Most of the cutting and drilling of hollow cylindrical soil samples are done manually, which takes a certain amount of time and energy from the test personnel. There are also human factors that affect the quality of soil samples, thus affecting the quality of soil samples and less efficient

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