| 垃圾填埋场ET封顶系统水分平衡数值分析 |
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| 引用本文： | 陆海军,栾茂田,张金利.垃圾填埋场ET封顶系统水分平衡数值分析[J].大连理工大学学报,2009,49(6):913-918. |
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| 作者姓名： | 陆海军 栾茂田 张金利 |
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| 作者单位： | 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;大连理工大学,土木水利学院岩土工程研究所,辽宁,大连,116024 |
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| 基金项目： | 国家自然科学基金资助项目(50639010,50678032) |
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| 摘 要： | 针对垃圾填埋场压实黏土最终封顶易受气候影响而开裂(干裂缝或冻融裂缝),其工程特性显著降低的缺陷,介绍了新型ET(蒸发传输)封顶系统的工作机理.在同时考虑降水和蒸发补给的作用下,建立了水汽在ET封顶系统迁移的一维数学模型.以大连市1976年的降水和蒸发补给气候条件为边界条件,模拟了ET封顶系统中的水汽在1a内变化规律.从分析模拟结果得出,距地面越近含水率受降水、蒸发补给气候条件的影响越显著,且随着深度的增加出现明显的峰值滞后现象.阻隔土壤层中的水分未达到饱和状态,说明总厚为150cm的ET封顶系统完全可以抵御大连市近48a以来最大强降水的冲击.对降水强度、降水持续时间以及阻隔层的厚度等参数进行了分析.数值分析与试验数据对比结果表明,计算值和试验数据基本吻合,验证了模型的可靠性.研究工作为建造垃圾填埋场ET封顶系统提供了理论依据.
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| 关 键 词： | 蒸发传输 垃圾填埋场 封顶系统 含水率 |
Numerical simulation of moisture balance in evapotranspiration landfill cover |
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| LU Haijun,LUAN Maotian,ZHANG Jinli.Numerical simulation of moisture balance in evapotranspiration landfill cover[J].Journal of Dalian University of Technology,2009,49(6):913-918. |
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| Authors: | LU Haijun LUAN Maotian ZHANG Jinli |
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| Institution: | LU Hai-jun1,2,LUAN Mao-tian1,ZHANG Jin-li1,21.State Key Laboratory of Coastal , Offshore Engineering,Dalian University of Technology,Dalian 116024,China,2.Institute of Geotechnical Engineering,School of Civil , Hydraulic Engineering |
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| Abstract: | The compacted clay cover systems of landfills were studied for desiccation cracks(dry crack or thowing crack for climate).The mechanism of a new type of evapotranspiration cover was analyzed to promote the engineering performance.On the basis of considering precipitation and evaporation,a one-dimensional dynamic model was developed for simulating moisture transport in evapotranspiration landfill cover.Volumetric water content was simulated based on the data of precipitation and evaporation of Dalian in 1976... |
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| Keywords: | evapotranspiration landfill cover system moisture content |
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