填埋场排水层渗透性演变模拟研究  

Simulation Study on Permeability Evolution of Landfill Drainage Layer

作　　者：蔡珍 CAI Zhen(Fujian College of Water Conservancy and Electric Power,Yongan 366000,China)

机构地区：[1]福建水利电力职业技术学院,福建永安366000

出　　处：《浙江水利水电学院学报》2023年第1期36-40,共5页Journal of Zhejiang University of Water Resources and Electric Power

基　　金：三明市科技计划引导性基金资助项目(2021-S-67)。

摘　　要：渗滤液在排水层渗透过程中会使排水层的渗透性降低。通过室内模拟试验,研究了在渗滤液渗透作用下排水层渗透性的演变规律,特别是排水层持水度、渗透系数、淤堵物特性间的关系及变化特征。研究结果表明:渗流初期是淤堵物与持水度的快速增长期,而排水层渗透系数的主降期要比前者长;淤堵物与持水度的增长对排水层渗透性的影响具有滞后性;渗流时间影响淤堵物的生成量,但不影响各元素的百分含量。该成果对于填埋场渗漏防治具有借鉴意义。The leachate will reduce the permeability of drainage layer during infiltration.Through the indoor simulation test,the evolution law on permeability of drainage layer under the infiltration of leachate is studied,especially the relationship and variation characteristics among water holding capacity,permeability coefficient and the characteristics of silt in drainage layer.The results show that the initial stage of seepage is the rapid growth period of silt and water holding capacity,while the main decline period of permeability coefficient of drainage layer is longer than the former.The increase of silt and water holding capacity has a lag effect on the permeability of drainage layer.The seepage time affects the production of silt but does not affect the percentage content of each element.The results can be used for reference in the prevention and treatment of landfill leakage.

关 键 词：渗滤液 淤堵物 渗透系数 持水度 元素成分 

分 类 号：X705[环境科学与工程—环境工程]