Method and Big Bag for Realizing Modular Permeable Reactive Wall

Abstract

The invention discloses a method for realizing a modularized permeable reaction wall and a large bag. The method includes: excavating an underground slot whose depth reaches below the impermeable layer; placing an outer frame device prefabricated by concrete in the underground slot; The frame device includes a plurality of frame units with preset seepage holes for water supply outflow; use a special spreader to place a plurality of large bags in the shape of a bag and with a transverse reinforcement belt on the outside of the frame unit of the outer frame device Among them, the big bag is equipped with a reaction medium for removing pollutant components in groundwater; wherein, the self-deformation effect of the big bag is used to make the transverse reinforcement belt of the big bag closely contact with the inner surface of the frame unit, so as to block the frame The water passage between the unit and the big bag forms a modular permeable reaction wall in which groundwater flows through preset seepage holes. The method of the invention can realize the construction of groundwater permeable reaction walls in complex formation conditions or in relatively deep parts, and each device can be used repeatedly, and the treatment is environmentally friendly and the cost is low.

Description

technical field [0001] The invention relates to the field of groundwater and soil pollution restoration and treatment of environmental treatment, in particular to a method for realizing a modular permeable reaction wall and a large bag thereof. Background technique [0002] The groundwater permeable reaction wall is an in-situ treatment system for the remediation and treatment of groundwater and soil pollution. Specifically, after the groundwater in the soil passes through the permeable reaction wall, the heavy metals or organics in the groundwater will degrade and precipitate with the remediation medium in the reaction wall. A series of physical, chemical or biological actions such as adsorption and adsorption to achieve the restoration of groundwater to achieve a certain discharge index is an in-situ restoration method that uses natural or artificial groundwater hydraulic gradients to achieve. [0003] Currently publicly available practices on groundwater permeable reactiv...

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Problems solved by technology

[0003] Currently publicly available practices on groundwater permeable reactive walls are all focused on the treatment of shallow groundwater on the surface, and cannot achieve complex geological conditions, contaminated groundwater, or deep soil restoration; moreover, general-purpose groundwater permeable reactive walls will The repair function of the groundwater reaction wall is passivated and the repair efficiency becomes poor. In this case, there must be the problem of incomplete pollution control; in addition, the replacement of the reaction medium in the infiltration reaction wall basically requires reinstallation of the reaction wall system. Large excavation method makes it difficult to standardize the repair medium, which leads to the problem of secondary pollution, and this shortcoming greatly restricts the promotion and use of groundwater permeable reaction walls

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