| 分层填埋场竖井及水平井联合抽气 |
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| 引用本文： | 冯世进,郑奇腾.分层填埋场竖井及水平井联合抽气[J].同济大学学报(自然科学版),2015,43(4):0536-541. |
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| 作者姓名： | 冯世进 郑奇腾 |
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| 作者单位： | 同济大学 土木工程学院，上海 200092；同济大学 岩土及地下工程教育部重点实验室，上海 200092,同济大学 土木工程学院，上海 200092 |
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| 基金项目： | 国家自然科学基金项目（41072201，41172245，41222021）,国家“九七三”重点基础研究发展计划（2012CB719803） |
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| 摘 要： | 采用特征函数展开法求解分层填埋场的二维气体运移模型,考虑了由于压缩、降解和含水量分布不均等引起的产气率和渗透系数成层特性以及垃圾的各向异性,然后结合边界和连续性条件确定其待定参数.最后,基于考虑了气体竖向和水平向运移的解析解,研究了竖井、水平井收集系统和排气层对填埋场内气体压力和回收率的影响,进一步提出了土工膜覆盖下填埋场气体收集系统的设计方法.
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| 关 键 词： | 分层填埋场 竖井 水平井 排气层 土工膜 |
| 收稿时间： | 2014/1/23 0:00:00 |
| 修稿时间： | 2014/12/31 0:00:00 |
Gas Migration in Layered Landfills Incorporating Vertical and Horizontal Extraction Wells |
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| FENG Shijin and ZHENG Qiteng.Gas Migration in Layered Landfills Incorporating Vertical and Horizontal Extraction Wells[J].Journal of Tongji University(Natural Science),2015,43(4):0536-541. |
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| Authors: | FENG Shijin and ZHENG Qiteng |
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| Institution: | College of Civil Engineering, Tongji University, Shanghai 200092, China;Key Laboratory of Geotechnical and Underground of the Ministry of Education, Tongji University, Shanghai 200092, China and College of Civil Engineering, Tongji University, Shanghai 200092, China |
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| Abstract: | A new two dimensional gas flow model was developed to analyze the gas migration in layered landfills. The model considers anisotropy of the municipal solid wastes(MSWs), and vertical variations in both gas generation and permeability caused by compression, degradation and inhomogeneous distribution of moisture content. The general solution of this model can be developed using eigenfunction expansion method, and the unknown integration constants can be determined by the boundary and continuity conditions. According to this analytical solution, the influences of vertical wells, horizontal lines and permeable layers on the gas pressure and recovery were further investigated. Finally, the design method of the landfill gas (LFG) collection system for layered landfills covered by geomembrane was proposed. |
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| Keywords: | layered landfill vertical well horizontal line permeable layer geomembrane |
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