Contaminated soil closed sampling system and soil sampling and replacement remediation method

Abstract

The invention provides a contaminated soil closed sampling system and a soil sampling and replacement remediation method, relates to the technical field of contaminated soil remediation, and solves the technical problems of ex-situ remediation of scattered small-range deep contaminated soil, insufficient foundation pit supporting safety, limited supporting space and flying dust and peculiar smellgenerated by excavation in the prior art. The contaminated soil closed sampling system comprises a closed soil sampling device, a sealing pile casing device and a dustproof and odor-inhibiting device,wherein the pile casing can be buried in contaminated soil, a soil sampling drilling tool of the closed soil sampling device can drill into the soil in the pile casing and take out the soil, and a chemical spraying unit of the dustproof and odor-inhibiting device can extend into the area of an opening of the pile casing. The method comprises the steps of pile casing burying, drilling and soil taking, clean soil backfilling, pile casing pulling and the like. The contaminated soil closed sampling system and the soil sampling and replacement remediation method are suitable for scattered small-range deep contaminated soil, guarantee supporting safety and prevent air pollution.

Description

technical field [0001] The invention relates to the technical field of contaminated soil remediation, in particular to a closed soil borrowing system for contaminated soil and a soil borrowing replacement repair method. Background technique [0002] With the development of urban industrialization, the problem of soil pollution is urgent. According to the requirements of relevant national laws and regulations, before reusing the site after the relocation of industrial enterprises, it is necessary to conduct site investigation and risk assessment, and restore the polluted site. There are many types of pollutants in industrial polluted sites in my country. Some factories have a long history and serious pollution. In addition, the distribution of different functional areas is scattered, making the depth of polluted soil deeper, forming scattered and small-scale deep polluted sites. In-situ or ex-situ remediation techniques can be used for deep-seated contaminated soil with disp...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of polluted soil airtight earth borrowing system and earth borrowing replacement repair method, to solve the ex-situ repair of scattered small-scale deep-layer polluted soil existing in the prior art, there is foundation pit support security and The support space is limited, which increases the difficulty of soil restoration and the technical problems of dust and odor caused by exposed excavation

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