Soil sampling device and sampling method for collecting full-shading sample of fine particle accumulation layer

Abstract

The soil sampling device comprises an outer sleeve soil penetrating pipe, an inner sleeve is arranged in the outer sleeve soil penetrating pipe, a floating layer stripper is arranged in the inner sleeve, and a shading sample packaging bag is arranged between the outer sleeve soil penetrating pipe and the inner sleeve; the full-shading sample of the fine particle accumulation layer can be conveniently, accurately and environmentally friendly collected, the bottom of the externally-sleeved soil penetrating pipe is the soil penetrating tip end, the bottom of the floating layer stripper is the soil clamping cutting ring, the soil penetrating tip end and the soil clamping cutting ring can penetrate into the fine particle accumulation layer easily, and time and labor are saved during sampling; in addition, samples obtained through the shading sample packaging bag are basically shading samples and can be used for experiments, and the sample utilization rate is high; cutting is not needed in the whole process, the overheating history of the sample cannot be influenced, and the error of a dating experiment is reduced; finally, the device can be repeatedly used, and waste is effectively avoided.

Description

technical field [0001] The invention relates to the technical field of Quaternary sediment age determination, in particular to a soil-taking device and a sampling method for collecting full-shade samples of fine-grained accumulation layers. Background technique [0002] At present, when measuring the geological age of accumulation layers, dating methods such as optical luminescence and electron spin resonance need to be used, and these testing methods need to collect samples in a completely shading environment. At present, for the fine-grained accumulation layer, the commonly used collection device is: a section of steel pipe or PVC pipe with a diameter of 5-10cm and a length of 20-30cm, a hammer, and a black plastic bag. The collection method is: use a hammer to smash the steel pipe or PVC pipe into the The fine grains collected are collected at a certain depth, and then taken out and sealed in a black plastic bag. For the above collected samples, it is necessary to cut th...

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Problems solved by technology

[0003] The shortcomings of the current sampling device and method are: ① the front end of the steel pipe or PVC pipe is flat, it is difficult to penetrate into the fine particle accumulation layer by a hammer, and sampling is time-consuming and laborious and prone to failure; ② the front and rear ends of the obtained tubular sample are usually non-woven The shading samples cannot be used in experiments and need to be discarded in the laboratory, and the sample utilization rate is low; ③During the sampling process, the non-shading soil on the surface may be mixed into the lower soil samples after rubbing against the pipe wall or vibrating, which will affect the accuracy of dating;④ The outer tube of the sample is not easy to cut, and the heat generated during the cutting process will easily affect the overheating history of the sample, increasing the error of the dating experiment; ⑤After using the sample, PVC pipe and steel pipe waste will be generated, which is wasteful and not environmentally friendly

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