Rotary static pressure type undisturbed soil sampling device suitable for shallow strata and sampling method

Abstract

The invention discloses a rotary static pressure type undisturbed soil sampling device suitable for a shallow strata. The sampling device comprises a soil sampling device body, the soil sampling device body comprises an outer barrel, the top of the outer barrel is connected with a hand-rotation rod, the hand-rotation rod is in screw joint connection with a three-foot type fixed mount, a pushing and pressing handle is arranged at the top of the outer barrel, an annular drilling tool is rotated and screwed at the bottom of the outer barrel, an annular bearing table with a groove is arranged on the inner wall of the annular drilling tool, a sampling inner barrel is connected to the interior of a cavity of the outer barrel through a bearing, and the lower end of the sampling inner barrel is arranged in the groove of the annular bearing table. The soil sampling device is simple in structure, small in size and convenient to carry and operate. During sampling, under the effect of the three-foot type fixed mount, the outer barrel can stably and evenly rotate and drill in vertically, and meanwhile drives the sampling inner barrel to enter a soil body with static pressure and no disturbance,sampling is finished at a time, and secondary packaging is not needed. In this way, disturbance is sufficiently reduced for a soil sample, the completeness of undisturbed soil is guaranteed, and theefficiency and the economy of soil sampling can be improved.

Description

technical field [0001] The invention relates to the technical field of soil taking for geological survey, in particular to a rotary static pressure undisturbed soil fetcher suitable for shallow surface layers and a sampling method using the soil fetcher. Background technique [0002] In the process of geological exploration, it is necessary to take samples from different soil layers and conduct indoor physical and mechanical tests to obtain the mechanical indicators of the soil where the samples are located. In order to ensure the accuracy of the test results, when sampling, the degree of disturbance to the soil sample should be reduced, and the integrity of the soil sample should be ensured as much as possible. [0003] The static pressure soil extractor is usually used in conjunction with the static pressure machine. It has a complex structure and poor portability. It is generally suitable for sampling the undisturbed soil below the shallow surface layer; After the soil l...

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Problems solved by technology

[0004] The present invention provides a rotary static pressure undisturbed soil fetcher suitable for shallow surface layers, and provides a sampling method using the above soil fetcher at the same time, the purpose of which is to solve the problems of complex structure, inconvenient operation and relatively large disturbance of soil samples in the existing soil fetcher. Problems that greatly affect the accuracy of test results

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