Column Sampling Method of Undisturbed Soil in Coastal Tidal Flats

Abstract

The invention relates to a method for sampling undisturbed soil column samples in coastal tidal flats and a sampler thereof. First, the outer wall of one end of a resin glass tube or a PVC tube is ground and sharpened, and the resin glass tube or PVC tube is driven into the soil along the polished and cut end. Put the sealed sealing bag on the upper opening of the resin glass tube or PVC tube, discharge the air between the sealing bag and the surface of the soil sample in the tube, then seal the sealing bag with the upper opening, and remove the resin glass tube or PVC tube from the soil After taking it out, seal both ends of the resin glass tube or PVC tube. The sampler includes a cylinder body made of resin glass tube or PVC tube, a sealed sealing bag and a sealing body that can be used to seal the mouth of the cylinder. One end of the cylinder body has an inclined tip, and the sealing bag can be sleeved on the cylinder body. The method and the sampler are simple and easy to use, cheap, efficient, and low in cost, and can be used for sampling undisturbed soil column samples in coastal tidal flats.

Description

technical field [0001] The invention relates to the fields of environmental and geological investigation and research, in particular to a sampling method and a sampler for undisturbed soil column samples in coastal tidal flats. Background technique [0002] At present, the method of obtaining undisturbed soil samples at home and abroad mainly adopts semi-open stainless steel samplers, and there are the following problems in the method of using semi-open stainless steel samplers 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 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 ...

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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