Gas Pressure Model for Layered Municipal Solid Waste Landfills
Gas Pressure Model for Layered Municipal Solid Waste Landfills
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城市固体垃圾分层填埋场气体压力模型
DOI：
10.1061/(asce)ee.1943-7870.0000533
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发表时间：
2012-07-01
影响因子：
2.2
通讯作者：
Chen, Yun-Min
中科院分区：
文献类型：
--
作者：
Li, Yu-Chao;Cleall, Peter John;Chen, Yun-Min
提出了一种计算分层填埋系统中气体压力分布的数学模型。给出了考虑零压力顶边界条件和零气体通量或固定气体压力底边界条件的解法。两种情况，规定的气体压力和规定的向内气体通量，讨论了涉及水平气体收集系统的场景。一系列应用实例表明，该模型可以用于研究(1)气体生成速率随深度和时间的变化，(2)土壤覆盖层，(3)水平收集层，(4)土工膜和土工合成粘土衬垫覆盖层对垃圾填埋场气体压力分布的影响。所提出的模型为堆填区工程师设计堆填区气体管理系统，特别是在选择和指定气体收集系统间距和泵时提供了有用的工具。DOI: 10.1061 /(陈纯)ee.1943 - 7870.0000533。(C) 2012美国土木工程师学会。
A mathematical model for calculating gas pressure profiles in layered landfill systems is presented. Solutions to scenarios considering a zero-pressure top boundary condition and a zero gas flux or fixed gas pressure bottom boundary condition are presented. Two cases, specified gas pressure and specified inward gas flux, are addressed for scenarios involving horizontal gas collection systems. A series of application examples demonstrate how the proposed model can be used to investigate the influences of (1) variation of gas generation rate with respect to depth and time, (2) soil covers, (3) horizontal collection layers, and (4) geomembrane and geosynthetic clay liner covers on gas pressure distribution in landfills. The proposed model provides a useful tool to landfill engineers in designing landfill gas management systems and in particular when selecting and specifying gas collection system spacing and pumps. DOI: 10.1061/(ASCE)EE.1943-7870.0000533. (C) 2012 American Society of Civil Engineers.