The treatment of historical waste piles is a difficult and hot topic in environmental protection management workcurrently,especially for waste piles with limited storage sites and steep slopes,the collaborative governance technology of in-situ pollution prevention and ecological restoration is one of the challenges in preventing and controlling pollution from historical legacy waste piles.Taking the slag pile control project of a closed mine ecological restoration project as an example,a new type of in-situ pollution prevention and ecological restoration technology for historical legacy waste piles has been proposed,so-called reinforcement of waste residue pile-soil protection-horizontal and vertical flexible barriers-ecological restoration and management plan,abbreviated as"Reinforced Soil Protection Flexible Barrier Ecological Restoration Technology".This technology uses geotextile bags and grid reinforcement to stabilize the slope of the waste residue pile.HDPE film is set as the main anti-seepage barrier layer on the surface of the pile,and geotextile chambers are hung for soil protection and greening.Flexible vertical pollution prevention and control barriers are set up around the waste residue pile to effectively prevent and control the pollution of the waste residue pile to surrounding groundwater and soil in a three-dimensional vertical manner.Meanwhile,the surface barrier of the waste heap is made of HDPE film,with a permeability coefficient less than 1×10-13 cm/s,the overall permeability coefficient of the flexible vertical barrier walls used around is less than 1× 10-7 cm/s,the ultimate goal is to achieve the synergy between pollution prevention and ecological greening,achieving a dual effect of in-situ pollution control and ecological restoration of waste residue piles.
关键词
历史遗留污染废渣/重金属污染/加筋保土结构/水平与垂直柔性阻隔/生态恢复
Key words
historical legacy pollution waste residue/heavy metal pollution/reinforced soil retaining structure/horizontal and vertical flexible barriers/ecological restoration
维普
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