Device and method for collecting undisturbed soil sample

Abstract

The invention relates to a device and a method for collecting an undisturbed soil sample. The device is characterized by comprising a lifting frame, a hydraulic cylinder, an annular slot forming part and a columnar soil take-out part, wherein the lower end of the hydraulic cylinder is vertically fixed at the bottom of the lifting frame, and a lifting table is fixed at the upper end of the hydraulic cylinder; the annular slot forming part is assembled on the lifting table in a working state and assembled on the lifting frame in a non-working state; and the columnar soil take-out part is assembled on the lifting table in a working state and assembled on the lifting frame in a non-working state. The method comprises the following steps: digging an annular slot to form columnar soil, exchanging a working part, and taking out the undisturbed columnar soil. The invention has the beneficial effects that the time for collecting the soil sample is shortened, the collecting efficiency is improved, the labor intensity of workers is reduced, the automation of slotting and soil taking is achieved, the damage to the undisturbed columnar soil of a collecting process is reduced, the sample quality is improved and a reliable sample is provided.

Description

technical field [0001] The invention relates to the field of soil sample collection, in particular to an undisturbed soil sample collection device and a collection method. Background technique [0002] In multidisciplinary research fields such as earth science, agronomy, soil science, and ecology, it has become a necessary means to obtain scientific data by collecting soil samples and directly analyzing their physical and chemical properties or measuring their physical and chemical indicators through simulation experiments. Traditional methods include artificial soil drilling, punching (such as GeoProbe), layered soil backfilling, and mixing and equal bulk density backfilling. Due to the manual completion and the limitation of the soil drilling itself, the artificial ground drilling method is inefficient and can only obtain soil columns with a thickness of 20-30cm and a diameter of <15cm; stamping methods (such as GeoProbe) can obtain soil columns with a thickness of abou...

AI Technical Summary

Problems solved by technology

Due to the manual completion and the limitation of the soil drilling itself, the artificial ground drilling method is inefficient and can only obtain soil columns with a thickness of 20-30cm and a diameter of <15cm; stamping methods (such as GeoProbe) can obtain soil columns with a thickness of about 1 meter, but Because the soil is taken by mechanical stamping, the soil bulk density and physical structure of the obtained soil column will change greatly, which will have little effect on the determination of soil chemical indicators such as organic matter content, but the measurement of soil density and soil hydraulic conductivity will have a large error; layering Soil backfilling and mixing are also similar problems. The layered soil backfilling method can generally ensure the original state of each layer of soil, but the soil disturbance between layers has a great impact on experiments such as soil water and salt migration simulation.

In short, the traditional soil sample collection methods and collection devices, either have efficiency problems, or have a large disturbance to the original soil, which has an impact on the scientificity and accuracy of scientific experimental research results

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