地铁明挖车站有关配筋问题的探讨_宋仪

2012－02－092012－04－031970—1992。300013。、、、。。DOI10．3973/j．issn．1672－741X．2012．04．015U231．4TU755．3A1672－741X201204－0514－04DiscussiononRebarCalculationofMetroStationConstructedbyCutandCoverMethodSONGYiChinaRailwayTunnelSurvey＆DesignInstituteCo．Ltd．Tianjin300013ChinaAbstractTherebarcalculationofMetrostationconstructedbycutandcovermethodisdiscussed．Itisproposedthatthepeak-to-averagepowerreductionaxialforcehaunchanddistributionbarshouldbeconsideredintherebarcalcula-tionofMetrostation．TheproposalishelpfulinimprovingthedesignqualityandreducingthecostifitisimplementedinthedesignofMetrostations．KeywordsMetrostationcutandcovermethodrebardesignpowerreductionaxialforcehaunchdistribution0。1000km700。。。18。141。1m3187．8kg238kg155kg。1．5。、、。。1Table1RebaramountofMetrostationsconstructedbycutandco-vermethod/t/kg/m314296165230992383232219045530195524722006233219375966196841411769269218310116502021118591551248121601330071941438071821－3、、。。《》。《》。。、、、、。1、、、。。1．1。1。A。B。B1。M=Mmax－1/3QB。1QAB。1Fig．1BendingmomentofsideseatofroofslabofMetrostation211－3Mmax=580kN·mQ=491kNB=0．7m0．8m。1M=Mmax－1/3QB=465kN·m。2。20%。24%。。。2Table2Influencesofpeak-to-averagepowerreductiononrebar/kN·m/mm2/mm58060000．2046545500．191．2。、。211－3、3。3Table3Influenceofaxialforceonrebar/kN·m/kN/mm2/mm246523140004550810．674464007500518．451046006500778858750010000315%～30%。。。1。。。。。2。。、、、。。。、5154。1．31。。。211－31。300mm×900mm4。4Table4Influenceofhaunchonrebar/kN·m/mm/mm2/mm/mm2465800455011004100437.5%10%。EF。1．4。。《》215%。。0．8m2855．2m3506．1tm3177kg。。、、45。29．1%。。5Table5AmountofrebarofroofslabofaMetrostation/t/%350．9100102．229．122．06．331．08．8506．11．5、。。2－231073802mm287423mm211．8%。。6。6Table6Comparisonandcontrastbetweencalculatedrebarareaandactualrebararea/mm2/mm2455028@100+25@10011067650028@100+25@2008612．5490028@1006158750025@100+25@1009818540025@100+25@2007363．5490028@1006158460028@100+25@10011067750025@100+25@1009818100025@10049094685074970946850mm274970mm260%。2、。2493258mm。2mmFig．2Cross-sectionofrebardistributionofrectanglularbeammm61532。。。。。T3。《》。。77T、。3TmmFig．3Cross-sectionofrebardistributionofT-shapedbeammm7Table7RebarcalculationsoflongitudinalbeamofroofslabofaMetrostationcrackcontrol/kN·m/mm2T5－644181608688426642824129241293、。、。《》。、、、、Tm3150kg。。References1GB50157—2003S．2003．2GB50010—2010S．2010．3GB50009—2001S．2010．505ZHUHongyangWANYaofang．Blastingvibrationmonito-ringandanalysisofshortcleardistancesectioninXiongdutunnelJ．SoilEngineeringandFoundation201125139－4262．inChinese6．D．2009．7．J．200724476－81．ZHANGChengliangLIXinpingCAOJunfeng．In-siteexperimentalstudyontransmissionofblastingvibrationwaveingroupsoftunnelsJ．Blasting200724476－81．inChinese8．M．200887－109．9．J．200759334－37．LOUXiaomingZHENGJunjieMAJianjunetal．Studyonblas-tingvibrationvelocityintunnelJ．NonferrousMetalsMiu-ingSection200759334－37．inChinese7154