In-situ continuous penetration penetrating probe for site investigation of napls polluted sandy soil

Abstract

The invention discloses an in-situ continuous penetrating probe used in non-aqueous phase liquids (NAPLs) polluted sandy soil field investigation. A time-domain reflective penetrating probe is mounted between a feeler lever and a friction barrel of a traditional static penetrometer. The structure of the time-domain reflective penetrating probe is that six symmetrical stainless steel needles are embedded in an outer surface of a hollow Derlin pole and are fixed on the Derlin pole through bolts, two coaxial cable inner conductors are respectively welded with a pair of bolts which are positioned on the top of the Derlin pole and penetrates through the diameter of the Derlin pole, and two adjacent bolts on two sides of the pair of bolts are form a group and are welded with coaxial cable outer conductors respectively. The penetrating probe is capable of acquiring dielectric constants, conductivities, tie resistances and side frictions of soil layers of different depth quickly, continuously and accurately. According to the electricity parameters and the mechanical parameters, polluted area and pollution degree of the NAPLs polluted sandy soil field are identified. The in-situ continuous penetrating probe provides a powerful tool in fast screening NAPLs polluted field.

Description

technical field [0001] The invention relates to a survey penetration probe, in particular to an in-situ continuous penetration penetration probe used for site investigation of NAPLs polluted sandy soil. Background technique [0002] With the development of the chemical industry and the widespread use of chemical products, non-aqueous liquids (NAPLs) represented by fuel oil (such as diesel oil), chlorinated hydrocarbons (such as carbon tetrachloride), and aromatic amines (such as aniline) are harmful to soil. The problem of groundwater pollution has become increasingly prominent. This type of polluted site has the characteristics of large discrete spatial distribution of polluted areas and deep pollutant migration depth, which makes the investigation difficult. For NAPLs-contaminated sites, the traditional investigation method is to drill samples on site and then conduct chemical analysis in the laboratory. This method has the disadvantages of time-consuming, difficult to o...

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Problems solved by technology

However, practice has proved that resistivity probes are difficult to effectively detect NAPLs contaminated soil

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