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43620106CHINACIVILENGINEERINGJOURNALVol.43Jun.No.62010:,,:200821221611112(1.,100022;2.,100039):,,,,,,,:;;;:TU441+.33TU441+.7:A:10002131X(2010)0620094206SettlementcalculationanddesignformunicipalsolidwastesanitarylandfillfoundationsXueXiang1YuWei1ShenBin1TangJianhua1QiuDongrui2(1.BGIEngineeringConsultantsLTD.,Beijing100022,China;2.BeijingBuildingConstructionResearchInstitute,Beijing100039,China)Abstract:Large2scalesanitarylandfillsarecommonlyemployedfordisposalofmunicipalsolidwastes.Limitedliteratureonsanitarylandfillshasfocusedonthegeotechnicalandstructuralissuesrelevanttolandfillsonsoftsoilfoundations.Thepaperpresentsareviewonthegeotechnicalcharacteristicsoflarge2scalefoundationsandthevariationofthewasteloadofneworreconstructedandexpandedsanitarylandfills.Thefactorsinfluencingthesettlementanddifferentialsettlementofthefoundationoflandfillsandthepotentialproblemsaresummarized.Thedesignprocessandcalculationresultsofareconstructedexpansionsanitarylandfillshowthatthesettlementordifferentialsettlementofthefoundationseverelyinfluencedesignoftheliningsystem,theleachatecollectionanddrainagesystemandthefinalcoverlayer.Keywords:municipalsolidwastesanitarylandfill;settlementoffoundation;settlementdifference;structuralsystemdesignofsanitarylandfillE2mail:snowmatic@126.com,,8.42%,450,1979,8.98%,15%20%,350kg,,,[122]4[3]:;(LFG);;,,[4],43695,,[5],,(),11.1:,[6](1);1Fig.1Structureoflandfills,,,,,,,,,,,,745812mm,[7],,,,,,,,,,,[8],,,,,,,,,,,,(),,,,,,,,,,,,,,1.2,;,,,3080m,300962010800kPa,,,1.02.5m,(,),,,,,,,,,,,,,,,(2.1454m[9]),,,,,,,,,,,22.1,,(660640)m2,,30m,10m,,(2),,,,;10m,,,2Fig.2AreconstructionandexpansionlandfillsatBeijing2.2(SFIA):,,2()[10],,;,,,();,,,,(660640)m2,1325,10kN/m3,5:1,4369710m,;2,,10m,;3,,10m;4,,30m,;5,,70m,1,,5(3)4(4)1,12,30m,56.96cm,,,70m,213.87cm,,,,,,1Table1Maximalsettlementandsettlementdifferenceofthecases12345(cm)22.1329.5529.8756.96213.87(cm)5.697.879.5922.9750.97(cm)20.4627.0328.6254.77210.59(%)(2%)1.981.921.921.711.3935(cm)Fig.3Thesettlementcontourofcase5(cm)98201044(cm)Fig.4Three2dimensionalfoundationsettlementundertheleachatecollectionanddrainagesystemof3thand4thareaofcase43,5,(),,,4,,(2%),,,,,5,1.39%,31.20%,,,,,,3,(),SFIA,,,,,,,(),,,,[1],,.[J].,2002,23(5):6182621(LiuYuchuan,LiLin,HeHuaijian.Investigationongeotechnicalproblemsofmunicipalsolidwastelandfill[J].RockandSoilMechanics,2002,23(5):6182621(inChinese))[2],.[J].,2005,19(2):53256(WangYong,SunJizhu.CurrentstatusofgeotechnicaltheoryresearchonMSWdisposal[J].SoilEngineeringandFoundation,2005,19(2):53256(inChinese))[3],,.[J].,2006,28(2):1842190(ChenYunmin,XieYan,ZhanLiangtong.One2dimensionalconsolidationmodelforlandfillsconsideringsolid2liquid2gasinteraction[J].ChineseJournalofGeotechnicalEngineering,2006,28(2):1842190(inChinese))[4],,.[J].,2006,28(6):4652468(XuChao,LiaoXingyue,LiZhibin.Geotechnicalengineeringissuesforsanitarylandfills[J].EnvironmentalPollution&Control,2006,28(6):4652468(inChinese))[5],,.[J].,2004,(3):53255(ZhangYunjun,ZaiJinmin,WangXudong.Analysis,calculationandgreyforecastingtothesettlementofMSWlandfill[J].Construction&DesignforProject,2004,(3):53255(inChinese))[6],.[J].,2005,22(S1):119212643699(ChenYunmin,KeHan.Engineeringcharacteristicsofmunicipalsolidwastesandgeotechnicalproblemsoflandfills[J].EngineeringMechanics,2005,22(S1):1192126(inChinese))[7],,.[J].,2004,35(11):8462848(ZhouJian,ZhangGang,LiJiesan.Caseanalysisonthedesignofmunicipalsolidwastelandfillinsoftsoilarea[J].ArchitectureTechnology,2004,35(11):8462848(inChinese))[8],,.[J].,16(4):56258(JiangShaosen,XuZiyan,LiuYatao.Engineeringstudyonlayereddrainagesystemofleachateinwastesanitarylandfillofplaintypeinnorthregion[J].EnvironmentalSanitationEngineering,16(4):56258(inChinese))[9],,.[J].,2002,28(9):19221(JinHong,ZhangDaqun,TanZhenjiang.OnkeytechnicalproblemsofShuangkourefuselandfillsiteinTianjin[J].Water&WastewaterEngineering,2002,28(9):19221(inChinese))[10],,.[J].,1981,3(3):41248(ZhangGuoxia,ZhangNairui,ZhangFenglin.Nonlineardifferentialsettlementanalysis[J].ChineseJournalofGeotechnicalEngineering,1981,3(3):41248(inChinese))(1979-),,,(1968-),,,(1964-),,,(1961-),,,(1981-),,,