Field shallow undisturbed soil sampling device

Abstract

The invention discloses a field shallow undisturbed soil sampling device, which belongs to the field of soil sample test instruments. The device comprises a soil sampling bracket, a sampling cylinder,a jack, a driving force transmission shaft, a force transmission cross beam, a central column, a horizontal connecting rod, a sliding block, a driven force transmission shaft, a threaded cap, a levelbubble, a clamping block, a spring steel wire and an extractor. An undisturbed soil sample can be obtained in the field, and the jack is used for providing main power, so that the problems that the soil sample is seriously disturbed due to non-uniform force application, and when the soil sample with higher strength is taken, the pressing is difficult, the sampling efficiency is low and the like are solved; the sampling barrel suitable for the cutting ring or the triaxial soil sample size is directly adopted for taking soil, so that secondary disturbance to the soil sample when the soil samplewith the specific size is cut is avoided. When an upper sample extracting barrel is rotated, clamping blocks on the sampling barrel slide in the circumferential direction of the barrel body of the sampling barrel, the spring steel wires are pulled out to cut off barrel bottom soil, disturbance to a soil sample when the barrel bottom soil is separated from lower-layer soil is avoided, and the soilsampling success rate is increased.

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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