Seashore tidal flat undisturbed soil column sample sampling method and sampler

Abstract

The invention relates to a seashore tidal flat undisturbed soil column sample sampling method and a sampler. The method comprises the following steps: firstly polishing and sharpening outer wall of one end of a resin glass tube or a PVC tube, driving the polished end of the resin glass tube and the PVC tube into soil, covering an upper opening of the resin glass tube or the PVC tube with a sealed sealing pocket, discharging air between the sealing pocket and the surface layer of a soil sample in the tube, tightly coupling the sealing pocket and the upper opening, taking the resin glass tube or the PVC tube out of soil and sealing two ends of the resin glass tube or the PVC tube. The sampler comprises a cylinder composed of the resin glass tube or the PVC tube, the sealed sealing pocket and a sealing body for sealing the cylinder opening. One end of the cylinder has an inclined tip. The sealing pocket can sleeve the cylinder. The method and the sampler are simple and good to use, cheap and efficient and low-cost, and can be used for sampling of seashore tidal flat undisturbed soil column samples.

Description

technical field [0001] The invention relates to the fields of environmental and geological investigation and research, in particular to a method and a sampler for sampling undisturbed soil column samples of coastal tidal flats. Background technique [0002] At present, the method of obtaining undisturbed soil samples at home and abroad mainly adopts semi-opening stainless steel sampler. There are the following problems in the method of using semi-opening stainless steel sampler to obtain undisturbed soil samples: [0003] The semi-open stainless steel sampler usually needs to make a special mold for welding, and the production cost is high; the sampler is in the shape of an opening, and during use, the sample taken out through the sampler needs to be sampled on site, so it cannot be kept undisturbed for a long time. In the study of microorganisms and environmental geochemistry, the obtained undisturbed column samples need to be cryopreserved, and the stainless steel sampler ...

AI Technical Summary

Problems solved by technology

[0003] The semi-open stainless steel sampler usually needs to make a special mold for welding, and the production cost is high; the sampler is open-shaped, and the sample taken through the sampler needs to be separated on site during use, so it cannot be kept undisturbed for a long time state; in microbiological and environmental geochemical studies, it is necessary to freeze the obtained undisturbed column samples, and the stainless steel sampler is difficult to meet this requirement; the semi-open sampler uses the friction between the soil and the pipe wall to bring the soil into the If it comes out of the ground, if it encounters dry and loose soil, the friction coefficient will become smaller, and the soil will lose its sample during use.

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