Horizontal barrier method for risk management and control of polluted plot

Abstract

The invention provides a horizontal barrier method for risk management and control of a polluted plot, and belongs to the technical field of the risk management and control of the polluted plot. The method comprises the following steps: 1) leveling a ground surface, clearing the plot and removing plants, leveling the ground surface to form a slope, and pre-digging a rainwater guide and drainage system base trench, wherein the slope gradient of the slope is 0.3%-8%; 2) setting up horizontal barriers on the ground surface, firstly laying a flexible material lining on the ground surface, and thenusing automatic spraying equipment to spray a hybrid fiber concrete covering layer on the surface of the flexible material, wherein the thickness of the covering layer is 2-10mm; 3) performing rainwater guide and drainage control; 4) setting a groundwater monitoring well; and 5) performing later maintenance. According to the invention, the horizontal barrier method can be used for risk managementand control of a persistent organic pollutant and a heavy metal polluted plot, and has the advantages of simple operation, reliable technology, low cost, and convenient construction, etc.

Description

technical field [0001] The invention belongs to the technical field of risk management and control of polluted land plots, and in particular relates to a horizontal barrier method for risk management and control of polluted land plots. Background technique [0002] In recent years, with the rapid process of urbanization, industrial upgrading and layout adjustment, more and more old industrial factories have been closed or relocated, and some of them have been engaged in the production and operation activities of non-ferrous metal smelting, chemical industry, electroplating, leather and other industries. After the soil environmental investigation and risk assessment, it is confirmed that the pollution hazard exceeds the acceptable risk level of human health or ecological environment, which is the polluted land. For polluted plots that are not yet developed and utilized or that do not have the conditions for treatment and restoration at this stage, a series of risk control mea...

AI Technical Summary

Problems solved by technology

The currently commonly used horizontal barrier technology mainly uses covering layers such as asphalt, concrete, and clay for blocking. The thickness of the covering layer is relatively thick, the amount of materials used is large, and the cost is high. It also increases the amount of work and the difficulty of disposal for subsequent treatment and restoration of contaminated land.