| 分层填埋垃圾体中气体一维稳态运移规律 |
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| 引用本文： | 魏海云,詹良通,陈云敏,凌道盛.分层填埋垃圾体中气体一维稳态运移规律[J].岩土工程学报,2009,31(11):1665-1671. |
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| 作者姓名： | 魏海云 詹良通 陈云敏 凌道盛 |
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| 作者单位： | 浙江大学软弱土与环境土工教育部重点实验室; 浙江省水利河口研究院; |
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| 基金项目： | 国家自然科学基金重点项目(50538080);; 国家自然科学基金项目(50408023);; 国家自然科学基金项目(50878194) |
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| 摘 要： | 针对垃圾填埋场分层填埋特点,提出了填埋垃圾产气率和导气系数分层计算方法,建立了分层填埋垃圾体中气体一维稳态运移分析模型,分析了垃圾的产气率、导气系数和封顶覆盖层的气密性对气压力大小及分布的影响,并探讨了垃圾填埋龄期对气压力分布的影响规律。分析结果表明:对于均质垃圾体,产气率与导气系数的比值越大,则填埋气压力越大;对于含封顶覆盖层的垃圾体,产气率主要控制气压力大小,导气系数控制气压力沿填埋深度分布梯度。封顶覆盖层厚度的增加或其导气系数的降低将使填埋气释放量减少,则气压力整体提高。垃圾填埋龄期越大,则垃圾体中气压力越小。
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| 关 键 词： | 城市生活垃圾 分层填埋 气体运移 产气率 导气系数 填埋龄期 |
One-dimensional gas migration in multi-layered landfills of municipal solid wastes |
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| WEI Hai-yun,ZHAN Liang-tong,CHEN Yun-min,LING Dao-sheng.One-dimensional gas migration in multi-layered landfills of municipal solid wastes[J].Chinese Journal of Geotechnical Engineering,2009,31(11):1665-1671. |
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| Authors: | WEI Hai-yun ZHAN Liang-tong CHEN Yun-min LING Dao-sheng |
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| Affiliation: | 1.MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering; Zhejiang University; Hangzhou 310027; China; 2.Zhejiang Institute of Hydraulics and Estuary; Hangzhou 310020; China |
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| Abstract: | A calculation method is presented for determining the change of gas generation rate and gas permeability with depth in a MSW landfill.One-dimensional model of gas migration in multi-layered landfills is established on the basis of the flow theory in porous media.The influences of gas generation rate,gas permeability of MSW and cap cover on gas pressure distribution are investigated.The influences of fill age of MSW on gas pressure distribution are also analyzed.The analytic results show that the gas pressur... |
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| Keywords: | municipal solid waste multi-layered landfill gas migration gas generation rate gas permeability fill age |
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