城市生活垃圾主压缩特性试验及修正主压缩指数模型研究
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摘要
城市生活垃圾的修正主压缩指数对于填埋场沉降预测、填埋容量评估和填埋进程规划具有重要意义。通过开展2组大型模型试验和6组填埋柱压缩试验,研究城市生活垃圾的主压缩特性并建立修正主压缩指数模型。修正主压缩指数随含水量的增大而增大,随干重度的增大而减小,随可压缩组分含量的增加而增大;建立以含水量、干重度和可压缩组分含量为主要参数的修正主压缩指数预测模型,并进一步拓展为能够预测修正主压缩指数随埋深的变化;利用苏州七子山填埋场钻孔取样测试数据对模型进行了验证,结果表明模型预测结果较为可靠且比文献模型表现更优;算例分析结果表明,考虑修正主压缩指数随埋深的变化,有利于更加精确地指导生活垃圾填埋场填埋进程规划和填埋容量评估。
The modified primary compression index of municipal solid waste(MSW) is an essential parameter for predicting waste settlement,evaluating landfill capacity and planning landfill process. Two groups of large-scale model experiments and six groups of column compression tests were conducted to investigate the primary compression behavior of MSW,and a modified primary compression index model was proposed. It is found that the modified primary compression index increases with increasing the moisture content or the compressible component content but decreases with rising the dry unit weight. A mathematical model for predicting the modified primary compression index was proposed taking the water content,dry unit weight and compressible component content into account,and the model was developed to predict the modified primary compression index with varied burial depths. Comparison between the model and the testing data of borehole samples from Qizishan landfill in Suzhou was carried out,which indicates that the model fits well the test data and performs better than the models documented in literature. An example illustrates that it is beneficial to take the variation of the modified primary compression index with burial depth into consideration in accurately planning the landfill process or/and assessing the landfill capacity of MSW landfills.
The modified primary compression index of municipal solid waste(MSW) is an essential parameter for predicting waste settlement,evaluating landfill capacity and planning landfill process. Two groups of large-scale model experiments and six groups of column compression tests were conducted to investigate the primary compression behavior of MSW,and a modified primary compression index model was proposed. It is found that the modified primary compression index increases with increasing the moisture content or the compressible component content but decreases with rising the dry unit weight. A mathematical model for predicting the modified primary compression index was proposed taking the water content,dry unit weight and compressible component content into account,and the model was developed to predict the modified primary compression index with varied burial depths. Comparison between the model and the testing data of borehole samples from Qizishan landfill in Suzhou was carried out,which indicates that the model fits well the test data and performs better than the models documented in literature. An example illustrates that it is beneficial to take the variation of the modified primary compression index with burial depth into consideration in accurately planning the landfill process or/and assessing the landfill capacity of MSW landfills.
引文
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[6]LANDVA A O,VALSANGKAR A J,PELKEY S G.Lateral earth pressure at rest and compressibility of municipal solid[J].Canadian Geotechnical Journal,2000,37(6):1 157-1 165.
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[11]刘荣,施建勇,彭功勋.垃圾土沉降特性的室内试验研究[J].扬州大学学报:自然科学版,2003,6(2):51-55.(LIU Rong,SHIJianyong,PENG Gongxun.Study on the deformation characteristics of interior refuse test[J].Journal of Yangzhou University:Natural Science,2003,6(2):51-55.(in Chinese))
[12]HOSSAIN M S,GABR M A,BARLAZ M A.Relationship of compressibility parameters to municipal solid waste decomposition[J].Journal of Geotechnical and Geoenvironmental Engineering,2003,129(12):1 151-1 158.
[13]廖智强,施建勇,冒俊.MSW主压缩指数变化规律试验研究及机制分析[J].河海大学学报:自然科学版,2007,35(3):326-329.(LIAO Zhiqiang,SHI Jianyong,MAO Jun.Experimental study and mechanism analysis of primary compression index of MSW[J].Journal of Hohai University:Natural Science,2007,35(3):326-329.(in Chinese))
[14]BAREITHER C A,BENSON C H,EDIL T B.Compression behavior of municipal solid waste:immediate compression[J].Journal of Geotechnical and Geoenvironmental Engineering,2012,138(9):1 047-1 062.
[15]HESHMATI R A A,MOKHTARI M,SHAKIBA RAD S.Prediction of the compression ratio for municipal solid waste using decision tree[J].Waste Management and Research,2014,32(1):64-69.
[16]HANDY R L.First-order rate equations in geotechnical engineering[J].Journal of Geotechnical and Geoenvironmental Engineering,2002,128(128):416-425.
[17]GABR M A,VALERO S N.Geotechnical properties of municipal solid waste[J].Geotechnical Testing Journal,1995,18(2):241-251.
[18]WALL D K,ZEISS C.Municipal landfill biodegradation and settlement[J].Journal of Environmental Engineering,1995,121(3):214-224.
[19]OLIVIER F,GOURC J P.Hydro-mechanical behavior of municipal solid waste subject to leachate recirculation in a large-scale compression reactor cell[J].Waste Management,2007,27(1):44-58.
[20]REDDY K R,HETTIARACHCHI H,PARAKALLA N S,et al.Geotechnical properties of fresh municipal solid waste at Orchard Hills Landfill,USA[J].Waste Management,2009,29(2):952-959.
[21]REDDY K R,HETTIARACHCHI H,GANGATHULASI J,et al.Geotechnical properties of synthetic municipal solid waste[J].International Journal of Geotechnical Engineering,2009,3(3):429-438.
[22]STOLTZ G,GOURC J P,OXARANGO L.Characterization of the physico-mechanical parameters of MSW[J].Waste Management,2010,30(8):1 439-1 449.
[23]CHEN R H,CHEN K S,LIU C N.Study of the mechanical compression behavior of municipal solid waste by temperature-controlled compression tests[J].Environmental Earth Sciences,2010,61(8):1 677-1 690.
[24]CHEN Y M,KE H,FREDLUND D G,et al.Secondary compression of municipal solid wastes and a compression model for predicting settlement of municipal solid waste landfills[J].Journal of Geotechnical and Geoenvironmental Engineering,2010,136(5):706-717.
[25]HADINATA F,DAMANHURI E,RAHARDYAN B,et al.Identification of initial settlement of municipal solid waste layers in Indonesian landfill[J].Waste Management and Research,2018,36(8):737-743.
[26]中华人民共和国行业标准编写组.CJJ176-2012生活垃圾卫生填埋场岩土工程技术规范[S].北京:中国建筑工业出版社,2012.(The Professional Standards Compilation Group of People′s Republic of China.CJJ176-2012 Technical code for geotechnical engineering of municipal waste sanitary landfill[S].Beijing:China Architecture and Building Press,2012.(in Chinese))
[2]李国建,陈世和,邵立明.城市垃圾处理与处置[M].北京:中国环境科学出版,1996:1-5.(LI Jianguo,CHEN Shihe,SHAO Liming.Municipal waste treatment and disposal[M].Beijing:China Environmental Press,1996:1-5.(in Chinese))
[3]VILAR O M,CARVALHO M F.Mechanical properties of municipal solid waste[J].Journal of Testing and Evaluation,2004,32(6):438-449.
[4]REDDY K R,GANGATHULASI J,PARAKALLA N S,et al.Compressibility and shear strength of municipal solid waste under short-term leachate recirculation operations[J].Waste Management and Research,2009,27(6):578-587.
[5]WONG W W.Investigation of the geotechnical properties of municipal solid waste as a function of placement conditions[M.S.Thesis][D].California:California Polytechnic State University,2009.
[6]LANDVA A O,VALSANGKAR A J,PELKEY S G.Lateral earth pressure at rest and compressibility of municipal solid[J].Canadian Geotechnical Journal,2000,37(6):1 157-1 165.
[7]JIE Y X,XU W J,DUNZHU D Z,et al.Laboratory testing of a densified municipal solid waste in Beijing[J].Journal of Central South University,2013,20(7):1 953-1 963.
[8]SOWERS G F.Settlement of waste disposal fills[C]//Proceeding of the 8th International Conference of Soil Mechanics and Foundation Engineering.Moscow:Springer,1973:207-210.
[9]詹良通,魏海云,陈云敏,等.垃圾原状样的力学压缩性及其与填埋龄期的关系[J].浙江大学学报:工学版,2008,42(2):353-358.(ZHAN Liangtong,WEI Haiyun,CHEN Yunmin,et al.Mechanical compressibility of in-site municipal solid wastes and its relationship to fill ages[J].Journal of Zhejiang University:Engineering Science,2008,42(2):353-358.(in Chinese))
[10]CHEN Y M,ZHAN L T,WEI H Y,et al.Aging and compressibility of municipal solid wastes[J].Waste Management,2009,29(1):86-95.
[11]刘荣,施建勇,彭功勋.垃圾土沉降特性的室内试验研究[J].扬州大学学报:自然科学版,2003,6(2):51-55.(LIU Rong,SHIJianyong,PENG Gongxun.Study on the deformation characteristics of interior refuse test[J].Journal of Yangzhou University:Natural Science,2003,6(2):51-55.(in Chinese))
[12]HOSSAIN M S,GABR M A,BARLAZ M A.Relationship of compressibility parameters to municipal solid waste decomposition[J].Journal of Geotechnical and Geoenvironmental Engineering,2003,129(12):1 151-1 158.
[13]廖智强,施建勇,冒俊.MSW主压缩指数变化规律试验研究及机制分析[J].河海大学学报:自然科学版,2007,35(3):326-329.(LIAO Zhiqiang,SHI Jianyong,MAO Jun.Experimental study and mechanism analysis of primary compression index of MSW[J].Journal of Hohai University:Natural Science,2007,35(3):326-329.(in Chinese))
[14]BAREITHER C A,BENSON C H,EDIL T B.Compression behavior of municipal solid waste:immediate compression[J].Journal of Geotechnical and Geoenvironmental Engineering,2012,138(9):1 047-1 062.
[15]HESHMATI R A A,MOKHTARI M,SHAKIBA RAD S.Prediction of the compression ratio for municipal solid waste using decision tree[J].Waste Management and Research,2014,32(1):64-69.
[16]HANDY R L.First-order rate equations in geotechnical engineering[J].Journal of Geotechnical and Geoenvironmental Engineering,2002,128(128):416-425.
[17]GABR M A,VALERO S N.Geotechnical properties of municipal solid waste[J].Geotechnical Testing Journal,1995,18(2):241-251.
[18]WALL D K,ZEISS C.Municipal landfill biodegradation and settlement[J].Journal of Environmental Engineering,1995,121(3):214-224.
[19]OLIVIER F,GOURC J P.Hydro-mechanical behavior of municipal solid waste subject to leachate recirculation in a large-scale compression reactor cell[J].Waste Management,2007,27(1):44-58.
[20]REDDY K R,HETTIARACHCHI H,PARAKALLA N S,et al.Geotechnical properties of fresh municipal solid waste at Orchard Hills Landfill,USA[J].Waste Management,2009,29(2):952-959.
[21]REDDY K R,HETTIARACHCHI H,GANGATHULASI J,et al.Geotechnical properties of synthetic municipal solid waste[J].International Journal of Geotechnical Engineering,2009,3(3):429-438.
[22]STOLTZ G,GOURC J P,OXARANGO L.Characterization of the physico-mechanical parameters of MSW[J].Waste Management,2010,30(8):1 439-1 449.
[23]CHEN R H,CHEN K S,LIU C N.Study of the mechanical compression behavior of municipal solid waste by temperature-controlled compression tests[J].Environmental Earth Sciences,2010,61(8):1 677-1 690.
[24]CHEN Y M,KE H,FREDLUND D G,et al.Secondary compression of municipal solid wastes and a compression model for predicting settlement of municipal solid waste landfills[J].Journal of Geotechnical and Geoenvironmental Engineering,2010,136(5):706-717.
[25]HADINATA F,DAMANHURI E,RAHARDYAN B,et al.Identification of initial settlement of municipal solid waste layers in Indonesian landfill[J].Waste Management and Research,2018,36(8):737-743.
[26]中华人民共和国行业标准编写组.CJJ176-2012生活垃圾卫生填埋场岩土工程技术规范[S].北京:中国建筑工业出版社,2012.(The Professional Standards Compilation Group of People′s Republic of China.CJJ176-2012 Technical code for geotechnical engineering of municipal waste sanitary landfill[S].Beijing:China Architecture and Building Press,2012.(in Chinese))