新建地铁隧道下穿既有地铁施工技术

doi:10.3969/j.issn.167226073.2010.01.02223120102(100018)1021,,,WSS,1011,,,U455A167226073(2010)0120082231101,6min,,,11.079m(1)1,1:2009208226:2009211218:,,,,[e-mail],,,,5mm,,21,10,1,,101,,,1,,WSS;,1,,3:,2060mm,100mm,,20mm60%70%,,3.15cm,15m,60cm13m8m,15,,,08128©1994-2011ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.),,2),,,(4m)(25cm1),,,C153)(50cm)0.82MPa,(Q)50L,,,4)24h,,0.50.8MPa,2.02.4MPa,,5),6),,,,4WSS,,,,,4.1,,,,,23d,,8100,0.51.2m,511mWSS24.2WSS1)2WSS,,,,,1520L/min,10L/min2)42mm,,,,,,,3),,,3050cm4),1520L/min,,10L/min5),0.30.5MPa,;,2030cm6),,,;,,,56,5m,,,2,1,:1),,,,2)25a,30cm,35cm38©1994-2011ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:,3:,4:,5:,6:,7:,8:,9:C30,,L7070,80cm;142,10;,5m,3)11,,1,;3421.5m,,0.5MPa,(3),14)31,1,,80cm5),30cm,,10cm,C256),,23d,,,7),,,,,,,10cm,,6,,5MPa,1.5mm,0.5mm,0.6mm,5mm,(4)4(88)48©1994-2011ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[1]GB500212001[S].:,2002.[2]GB503071999[S].:,2000.[3],.[J].,2008,25(2):126.[4].[J].,2002,5(9):10211.[5].[J].,2007,33(5):1902192.(:)CommentsonGeotechnicalInvestigationforUrbanRailTransitProjectsLiuShuyaChenXiangsheng(ShenzhenMetroGroupCo.,Ltd.,Shenzhen518026)Abstract:ThereexistdefectsinthepresentgeotechnicalinvestigationanditsmanagementmodesforShenzhenurbanrailtransit,suchasinsufficientattentionpaidtothecityenvironmentinvestigation,independenceofgeologicalinvestigationfromenvironmentinvestigation,lackofcloserelationshipbetweengeotechnicalinvestigationanddesign,inferiorinvestigationquantityandlackofsupervisionandexaminationforinvestigationwork,etc.Theabovementioneddefectsobstructtheefficientdesignandthepropercontrolofsafetyrisk.Thispaperputsforwardsomesuggestionsfortheimprovementofgeotechnicalinvestigation.Keywords:urbanrailtransit;geotechnicalinvestigation;environmentalinvestigation;geotechnicaldesign;surveying(84)7,,5mm,12.4m(5/12.4=0.4mm/m),,,[1].[M].:,2004.[2].[M].:,2005.[3]GB501572003[S].:,2003.[4]GB502992003[S].:,2003.[5]TB101082002[S].:,2002.[6]DBJ15382005[S].:,2005.(:)NewMetroTunneltoUnder2passanExistingMetroTunnelWangChunsheng(ChinaRailway16BureauGroupCo.,Ltd.,Beijing100018)Abstract:TransittunnelfromGuomaoStationtoShuangjingStationonBeijingmetroLine10under2passestheexistingBeijingmetroLine1whilethestructuralsafetyoftheexistingmetrohasbeenapproachingthecriticalstate.Theconstructionshouldnotinterruptmetrooperation.Tocontrolthedisplacementsanddeformationsoftheexistingstructurecausedbythenewmetrolineconstruction,sleeve2valve2pipegroutingandWSSconstructionmethodwereadoptedtoreinforcetheexistingstructure.SincethetopofprimarysupportofthenewmetroLine10andtheprimarysupportinvertoftheexistingLine1werecloselyrelatedwitheachother,rigidsupportswereadoptedatthebottomoftheexistingLine1tocarryonwiththetunnelconstructiontoensurethesafetyofconstructionandtheoperationoftheexistingmetro.Thisprojectusedclosely2attachedmethodfirsttounder2passtheexistingmetrotunnelwithoutprecedentsuccessfuldesignandconstructionexamplesforreference,whichprovidesdueguidingsignificancetourbanundergroundconstruction.Keywords:subway;tunnel;existingstructure;reinforcement;constructiontechnology88©1994-2011ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.