Isolation processing method of polluted groundwater

Abstract

The invention provides an isolation processing method of polluted groundwater. The isolation processing method comprises the following steps: an anti-seepage curtain separated moderately-strong permeable layer is established through a vertical anti-seepage system and a horizontal drill hole or an adit, and a vertical and horizontal draining device and a monitoring system are arranged in a weak permeable layer to change and control the groundwater seepage path to control the groundwater leakage amount of the weak permeable layer, so that the requirement that the permeability coefficient reaches 10<-7> cm/s is met, and the influence of groundwater seepage pollution on the surrounding environment can be completely controlled. The isolation processing method combines a vertical anti-seepage technology, a horizontal and vertical groundwater draining and dynamic monitoring technology and a dynamic groundwater control technology, and thus has a high application value, and is especially suitable for seepage control of polluted groundwater in a tailings impoundment and other polluted groundwater.

Description

Technical field [0001] The invention relates to the field of isolation and prevention of polluted groundwater, in particular to an isolation treatment method for polluted groundwater. Background technique [0002] With the development of human industry, groundwater pollution has become increasingly serious. In the vast majority of cities in my country, groundwater is polluted by organic and inorganic toxic and harmful pollutants to varying degrees. It has shown a trend of gradually expanding, from shallow to deep, from urban to rural areas, and increasing pollution. According to the relevant department's continuous monitoring statistics of 118 cities for 2 to 7 years, about 64% and 33% of the urban groundwater has suffered heavy and light pollution, and the basic clean urban groundwater is only 3%. Especially in the contaminated sites left by the relocation of urban industries, the surface contaminated soil under the action of rainfall and surface runoff makes the shallow ground...

AI Technical Summary

Problems solved by technology

At present, most tailings of non-ferrous metallurgy and phosphorus chemical industry adopt horizontal anti-seepage system, vertical curtain anti-seepage or a combination of the two methods, which are difficult to meet this requirement

The main reason is: the horizontal anti-seepage structure is easy to be damaged during construction or later operation, resulting in anti-seepage failure and a large amount of leakage; in the past, most permeability coefficient control standards for vertical curtain systems were 10 -5 cm / s order of magnitude, does not meet the permeability coefficient of 10 -7 cm / s. In addition, the vertical curtain and anti-seepage wall construction technology is limited by the existing equipment and technology. It is difficult for the anti-seepage wall to enter the deep bedrock, and the quality control of curtain grouting in the deep part is also difficult to achieve ideal results.

These technologies that rely entirely on isolation are still difficult to meet the requirements of strict leakage control

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