干拌法柔性阻隔墙在污染场地风险阻控中的应用及研究  

Application and Research of Dry Mixing Flexible Partition Wall in Risk Control of Polluted Site

作　　者：占升 元妙新 徐华锺 张飞 陈欢 Zhan Sheng;Yuan Miaoxin;Xu Huazhong;Zhang Fei;Chen Huan(China Energy Conservation Dadi Environmental Remediation Co.,Ltd.,Hangzhou 310016,China)

机构地区：[1]中节能大地(杭州)环境修复有限公司,浙江杭州310016

出　　处：《环境科学与管理》2024年第1期61-66,共6页Environmental Science and Management

基　　金：中国节能环保集团有限公司重大科技创新项目(cecep-zdkj-2019-012);浙江省科技计划项目(2021C03167);国家重点研发计划(2018YFC1802300)。

摘　　要：随着“零填埋”时代的到来,中国将面临大量的存量垃圾填埋场,由于卫生填埋场防渗系统的易渗漏及非正规填埋场防渗系统的缺失,填埋场普遍存在渗漏污染地下水的风险。针对填埋场地下水风险管控,柔性阻隔墙具有渗透系数低、化学相容性好的特点,而现阶段应用相对较少。据此,文章以南方某非正规垃圾填埋场为研究对象,探究采用干拌、湿拌法工艺构筑阻隔墙的效果,发现干拌法施工工艺简单,操作便利且其构筑墙体的渗透系数达10 cm~7 cm/s级别,结合阻隔区内外的水头差可有效发挥风险阻控作用,阻隔区周边的地下水水质在监测周期内总体呈下降趋势。With the advent of the“zero landfill”era,China is facing the challenge of handling large number of existing landfill sites.Due to the easy leakage of the anti-seepage system of sanitary landfills and the lack of anti-seepage systems of informal landfills,there is a general risk of leakage polluting the groundwater in the landfill.For the risk control of groundwater in landfill sites,flexible barrier walls have the characteristics of low permeability coefficient and good chemical compatibility,but the applications are relatively few at present.Taking an informal landfill in the South as the research object,this paper explores the effect of using dry mixing and wet mixing methods to build barrier walls.It is found that the dry mixing method has the advantages of simple construction technology,convenient operation,and the permeability coefficient of the barrier wall meets the level of 10-7cm/s.Combining the water head difference inside and outside the barrier zone can effectively play a risk control role.The groundwater quality around the barrier area generally shows a downward trend during the monitoring cycle.

关 键 词：填埋场 渗漏 柔性阻隔墙 干拌法 风险阻控 

分 类 号：X705[环境科学与工程—环境工程]