HDPE柔性垂直防渗技术在历史遗留废渣原位风险管控中的应用  

Application of HDPE Flexible Vertical Anti-seepage Technology in In-situ Risk Management of Historical Waste Residue

作　　者：蒲红霞 贺实月 胡泸丹 张旭晨 张志军 魏新庆 PU Hongxia;HE Shiyue;HU Ludan;ZHANG Xuchen;ZHANG Zhijun;WEI Xinqing(Tianjin JC Environmental Services Co.Ltd.,Tianjin 300202)

机构地区：[1]天津建昌环保股份有限公司,天津300202

出　　处：《环境卫生工程》2024年第3期100-104,共5页Environmental Sanitation Engineering

基　　金：天津市科技领军(培育)企业重大项目(20YDLYSN00030)。

摘　　要：以南方某废渣回填区污染修复治理工程为研究对象,其废渣属第Ⅱ类一般工业固体废物,根据其水文地质、污染风险、运行维护特征和污染特性,采用“四周HDPE柔性垂直防渗+堆体表面水平防渗+生态植物修复”的原位风险管控技术进行污染修复治理,并对修复效果进行分析。结果表明:对于中风化层这类弱透水性的隔水层,采用控制污染物总量的原则,通过增加垂直防渗的深度可实现等效防渗;针对场地中间强风化层的岩性地质,需要实行槽壁加固的工程措施。最终,该工程通过防渗检测评估,HDPE柔性垂直防渗膜的原位隔离效果良好,对于同类型废渣污染场地的治理与修复工程具有一定的参考和借鉴意义。The pollution restoration and treatment project of a waste slag backfill area in South China was taken as the research object,its waste residue belongs to the class II of general industrial solid waste.According to the hydrogeology,pollution risk,operation and maintenance characteristics,combined with its pollution characteristics,the in-situ risk control technology of“HDPE flexible vertical anti-seepage around+horizontal anti-seepage on pile surface+ecological phytoremediation”was adopted for pollution remediation,and the restoration effect was analyzed.The results showed that for weakly permeable aquifers such as moderately weathered layers,equivalent seepage control could be achieved by increasing the depth of vertical seepage by using the principle of controlling the total amount of pollutants.Engineering measures for foundation reinforcement should be implemented based on the lithology and geology of the strongly weathered layer in the middle of the site.Finally,the project through the anti-seepage testing and evaluation,and achieved good insitu isolation effect by HDPE flexible vertical seepage geomembrane,which had certain reference significance for the treatment and restoration project of the same type of waste residue polluted site.

关 键 词：HDPE柔性垂直防渗 等效防渗 槽壁加固 原位风险管控 

分 类 号：X705[环境科学与工程—环境工程]