填埋场连续型排水结构中最大饱和深度的计算
摘要:确定填埋场中的最大饱和深度是进行渗滤液导排系统设计的关键技术参数。针对倾斜场地上的连续型排水结构,基于流量连续条件、Dupuit假设与扩展Dupuit假设,在稳态渗流下,分别建立了浸润线方程,采用数值方法进行计算。通过变动参数计算与分析表明,当场地坡度小于10%时,可采用Dupuit假设下的计算方法进行计算。对于采用土工排水网的连续型排水结构,土工排水网导水率与场地坡度为控制填埋场最大饱和深度的重要因素;保护层渗透系数与入渗率对于控制排水系统的排水效率具有不可忽视的作用。同时比较了水平场地上的锯齿型与连续型排水结构的排水效率,表明前者优于后者。
Abstract:Maximum saturated depth is an important parameter in designing of landfill leachate dramage systems. Dased on the groundwater flow continuity principles, Dupuit assumptions and extend Dupuit assumptions, phreatic surface governing equations were established over the landfill with slope liner in continuous-slope configuration drainage system, respectively. These equations were solved by numerical calculation. Though computation and analysis of change parameters, the results indicate that Dupuit assumptions can be used to calculate the maximum saturation depth as the slope of landfill liner is less than 10%. When geonet is employed in continuous-slope configuration drainage system, transmissivity of geonet and slope of landfill liner are important influence factors for maximum saturation depth, hydraulic conductivity of protect layer and impingement rates for efficiency of drainage system can't be ignored. At the same time, compared the efficiency of continuous-slope with saw-tooth configuration's in level landfill liner, the results show the former is better than the latter.
中文标题：
填埋场连续型排水结构中最大饱和深度的计算
The Calculation of Maximum Saturated Depth in Landfill with Continuous-slope Configuration Drainage System
作者：
张金利1,王铁军2
Zhang Jinli1,Wang Tiejun2
作者简介:张金利,1964年生,男,吉林东辽人,博士,副教授,主要从事环境岩土工程方面研究工作,E-mail:Zhangjhili7910@sina.com
通讯地址：
1. 大连理工大学海岸和近海工程国家重点实验室, 辽宁大连 116024; 2. 大连理工大学土木水利学院岩土工程研究所, 辽宁大连 116024
1.StateKeyLaboratoryofCoastalandOffshoreEngineering,DalianUniversityofTechnology,Dalian116024,China; 2.InstituteofGeotechnicalEngineering,SchoolofCivilandHydraulicEngineering,DalianUniversityofTechnology,Dalian116024,China
中图分类号:X705
doi:10.3969/j.issn.1007-2993.2009.04.006
出版物：岩土工程技术
收稿日期:2009-04-27
关键词:填埋场,最大饱和深度,连续型排水结构
Key words:landfill,maximum saturated depth,continuous-slope configuration
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基金项目：
基金项目: 国家自然科学基金资助项目(50679015)
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