Device for directly propelling soil sampling and sampling method of device

Abstract

The invention discloses a device for directly propelling soil sampling and a sampling method of the device. The device comprises an external drilling rod and a first cutting drilling bit located at the lower end of the external drilling rod, wherein the external drilling rod is a hollow pipe and is internally provided with a surface-layer soil sampling platform or a deep-layer soil sampling device; the surface-layer soil sampling platform comprises a first sampling pipe and a retainer; the deep-layer soil sampling device comprises an internal drilling rod, a second cutting drilling bit located at the lower end of the internal drilling rod and a second sampling pipe located in the internal drilling rod; in a surface-layer soil sampling working process, the surface-layer soil sampling platform is mounted in the external drilling rod; in a deep-layer soil sampling working process, the surface-layer soil sampling platform is taken out and is replaced with the deep-layer soil sampling device; the deep-layer soil sampling device is inserted into the external drilling rod to carry out continuous sampling. According to the device and the sampling method, disclosed by the invention, the surface-layer soil sampling platform and the deep-layer soil sampling device are matched to use to finish surface-layer and deep-layer soil synchronized sampling operation; the sampling quality and the working efficiency are ensured and the surface-layer soil sampling rate is improved.

Description

technical field [0001] The invention relates to a soil fetching device, in particular to a composite device for synchronous sampling of surface and deep soil, and belongs to the technical field of soil investigation and sampling. Background technique [0002] With the continuous acceleration of urbanization and industrialization and the frequent interference of human activities, the problem of soil pollution has become more and more serious. On April 17, 2014, the Ministry of Environmental Protection and the Ministry of Land and Resources jointly issued the "National Soil Pollution Survey Bulletin". The heavily polluted sites are 11.2%, 2.3%, 1.5% and 1.1%, respectively. The overall soil environment is not optimistic, and pollution control is imminent. [0003] Clarifying the composition and concentration of soil pollutants is the basic premise for formulating soil pollution control measures, and soil sample collection and analysis are the basic means to obtain soil physica...

AI Technical Summary

Problems solved by technology

However, in this direct pressure sampling method, the frictional resistance between the drill bit and the soil is relatively large in the process of directly pushing down, causing the soil entering the sampling tube to be compressed, resulting in a lower sampling rate for loose surface soil.

The low sampling rate of surface soil will not only challenge the physical and chemical properties of the soil, but also lead to errors in the judgment of the pollution depth

If the surface soil samples are collected separately, new sampling equipment will be added, which will affect the efficiency of on-site work

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