我国生活垃圾填埋场水平衬里结构及全寿命服役性能分析  

Liner Structures and Life-cycle Performance of Municipal Solid Waste Landfills in China

作　　者：詹良通[1,2] 谢海建[1,2] 陈成 陈云敏[1,2] ZHAN Liangtong;XIE Haijian;CHEN Cheng;CHEN Yunmin(College of Civil Engineering and Architecture,Zhejiang University,Hangzhou Zhejiang 310058;MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering,Zhejiang University,Hangzhou Zhejiang 310058;School of Engineering,Hangzhou City University,Hangzhou Zhejiang 310015)

机构地区：[1]浙江大学建筑工程学院,浙江杭州310058 [2]浙江大学软弱土与环境土工教育部重点实验室,浙江杭州310058 [3]浙大城市学院工程学院,浙江杭州310015

出　　处：《环境卫生工程》2024年第S01期49-58,共10页Environmental Sanitation Engineering

基　　金：国家自然科学基金基础科学中心项目(51988101);国家自然科学基金青年科学基金(42307210)。

摘　　要：探讨了我国生活垃圾填埋场的水平衬里结构及全寿命服役设计方法,涵盖了渗滤液水头和特征污染物浓度负荷、水平衬里的污染阻隔机制及击穿时间计算方法,以及全寿命服役设计标准与流程。对比分析了我国3部国家标准(GB 16889—2024生活垃圾填埋场污染控制标准、GB 50869—2013生活垃圾卫生填埋处理技术规范和《生活垃圾卫生填埋处理岩土工程技术标准》)中的水平衬里结构选型和适用条件,并采用击穿时间计算方法对典型水平衬里结构的服役性能进行对比分析。结果表明,《生活垃圾卫生填埋处理岩土工程技术标准》针对我国城市生活垃圾厨余含量高和含水率高、填埋后渗滤液产生量大和导排层渗滤液水头显著超过30 cm的实际情况,明确要求开展水平衬里全寿命服役性能分析,并提出了适用于高水头负荷的双层复合衬里结构。GB 50869—2013规定的单层和双层水平衬里结构在高水头负荷条件下难以达到100 a的服役寿命,尤其是在填埋高度超过60 m的山谷型填埋场中,双层水平衬里结构的击穿时间约为80 a。《生活垃圾卫生填埋处理岩土工程技术标准》所推荐的双层复合衬里在相同条件下击穿时间超过100 a。The liner structures at landfill sites in China and the life-cycle service design method were investigated,which covered the leachate head,characteristic pollutant concentration load,the barrier mechanism of liners,the calculation method of breakthrough time,and the life-cycle service design criterion and process.A comparative analysis was conducted on the liner structures and their applicable conditions in three national standards of ChinaGB 16889—2024 Standard for Pollution Control on the Landfill Site of Municipal Solid Waste,GB 50869—2013 Technical Code for Municipal Solid Waste Sanitary Landfill,and Technical Code for Geotechnical Engineering of Municipal Solid Waste Sanitary Landfill.The service performance of typical liner structures was compared using the breakthrough-time calculation method.The analysis showed that Technical Code for Geotechnical Engineering of Municipal Solid Waste Sanitary Landfill explicitly required a life-cycle service performance analysis of liners based on the actual conditions of high kitchen waste content,high moisture content,large leachate production,and significant leachate head exceeding 30 cm at landfill sites.The standard also proposed a double-layer composite liner structure suitable for a high leachate head.The single-layer and double-layer liner structures specified in the GB 50869—2013 were unable to achieve a 100 years service life under high leachate head conditions,especially in valley-type landfills with a filling height exceeding 60 meters,where the breakthrough time of the double-layer liner structure was about 80 years.The double composite liner recommended in Technical Code for Geotechnical Engineering of Municipal Solid Waste Sanitary Landfill had a breakthrough time of over 100 years under the same conditions.

关 键 词：生活垃圾填埋场 水平衬里 全寿命服役性能 设计方法 

分 类 号：X799.3[环境科学与工程—环境工程] X703