A field shallow undisturbed soil sampling device

Abstract

The invention discloses an undisturbed shallow soil sampling device in the field, which belongs to the field of soil sample test instruments, and includes a soil sampling support, a sampling cylinder, a jack, an active force transmission shaft, a force transmission beam, a central column, a horizontal connecting rod, a sliding block, Passive power transmission shaft, threaded cap, level bubble, clamping block, spring steel wire and puller; the undisturbed soil sample can be obtained in the field, and the active force provided by the jack solves the serious disturbance of the soil sample due to uneven force application, and When taking soil samples with high strength, it is difficult to press in, and the sampling efficiency is low; directly use the sampling cylinder suitable for the ring cutter or triaxial soil sample size to avoid the soil damage when cutting soil samples of a specific size. The second disturbance generated by the sample. When extracting the sample cylinder on rotation, the block on the sampling cylinder slides along the circumferential direction of the cylinder body of the sampling cylinder and pulls out the spring steel wire to cut off the bottom soil of the cylinder, which avoids the disturbance of the soil sample when the bottom soil of the cylinder is separated from the lower layer of soil, and improves the soil extraction process. success rate.

Description

technical field [0001] The invention relates to the field of soil sample testing instruments, in particular to a field shallow undisturbed soil sampling device. Background technique [0002] In the fields of engineering geology and geotechnical engineering, it is necessary to take soil samples in the field and conduct indoor tests on them to obtain the physical and mechanical properties of the soil samples and provide a basis for engineering design. Geotechnical testing is not only a necessary work content of geotechnical engineering and engineering geology related engineering practice, but also indispensable in experimental teaching and scientific research. Therefore, the acquisition of undisturbed soil samples with undisturbed structures is one of the important work contents. In order to obtain the relevant data of undisturbed soil samples and provide a basis for engineering construction and scientific research, reasonable and practical soil borrowers are particularly impo...

AI Technical Summary

Problems solved by technology

[0004] At present, in the field, manpower (static force or power) is usually used to press the ring knife sampler into the soil to obtain shallow soil samples. Although it is convenient to carry and use, the soil sample is seriously disturbed due to the uneven application of force; When taking soil samples with high strength, it is very difficult to press in manually, and when the ring cutter is taken out, the soil at the bottom of the ring cutter is not completely separated from the subsoil, which often causes the soil sample structure to be disturbed, and the sampling efficiency is too low to be suitable for a large number of soil samples in the field. the acquisition

On the other hand, the soil samples taken are only ring-knife samples, and triaxial testing cannot be performed

At present, in the field of geotechnical engineering, there are few earth-extractors for taking shallow undisturbed triaxial and ring-knife soil samples in the field.

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