成层介质中渗滤液最大饱和深度的简易解法

基于McEnroe给出的衬里上排水层饱和深度的解析解,分析了垃圾填埋场衬里上渗滤液最大饱和深度和设计参数入流量、排水层渗透系数和衬里坡度之间的函数关系;给出了渗滤液最大饱和深度及其在衬里上出现位置之间的关系,分析了衬里坡度对最大饱和深度出现位置的影响。在此基础上给出了在成层介质中适用于扩展Dupuit假定的一种简化计算渗滤液最大饱和深度的方法。算例结果表明该方法简单,便于在工程中使用。

Simplified solution of maximum saturated depth of landfill leachate in layered drainage media

Functional relationships among maximum saturated depth over the liner and some design parameters,including inflow into landfill leachate, the permeability coefficient of the drainage layer and the slope of the leachate liner,are analyzed based on the McEnroe analytic solution.After obtaining the value of the maximum saturated depth,the position where the maximum saturated depth occurs on the leachate liner is also analyzed,considering the effects of the slope of the leachate liner on maximum saturated depth.Then,a simplified method for calculating the maximum saturated depth in multilayered drainage media is proposed.A case study indicates that this method is very suitable for application in the design of a drainage layer for a landfill.