中文摘要：

根据水量平衡原理,以扩展的Dupuit假定为基础,建立了填埋场封顶系统饱和深度的计算模型,应用该模型研究了均布型、前峰型、中峰型和后峰型4种降雨模式对填埋场封顶系统饱和深度的影响,并分析了不同降雨模式条件下降雨强度、排水层渗透系数、水平排水距离和斜坡坡度对封顶系统最大饱和深度的影响规律。计算结果表明,前峰型降雨模式条件下封顶系统饱和深度的增长速率最快,后峰型增长速率最慢,均布型和中峰型对应的饱和深度增长速率介于上述两者之间;封顶系统最大饱和深度随排水层渗透系数的变化有一敏感范围,处于该范围内最大饱和深度随排水层渗透系数的增加显著减小;水平排水距离的增加会引起封顶系统最大饱和深度明显的增大。

英文摘要：

Based on the water balance principle and the expanding Dupuit assumption,a model is developed to determine the saturated depth over the barrier in landfill cover system.Using this model,the variation of the saturated depth over time is analyzed under four different rainfall patterns,which include uniform,previous peak,center peak and post-peak patterns.Then,the effects of rainfall pattern,hydraulic conductivity of drainage layer,horizontal drainage distance and drainage slope on the maximum saturated depth are studied.The calculated results show that the saturated depth grows fastest under the previous peak pattern and the most slowly under the post-peak pattern,and falls somewhere between these two extremes for the uniform and center peak patterns.The maximum saturated depth significantly decreases when the hydraulic conductivity gradually increases in some range.However,the maximum saturated depth quickly increases with the increase of horizontal drainage distance.