风火山隧道穿越地下冰层施工技术(3)

stress,andthepossibilityofpenetrationcracksduetotemperaturedifference.Measureswereraisedforpreventionofsurfacecracks.Keywords　Qinghai2TibetRailway,severecoldarea,concrete,microcrackDesignCharacteristicsofBeipanjiangRiverBridgeonShuibaiRailway

ChenKejian

Abstract　ANSYSwasusedtoestablishafiniteelementmodelofthebox2shaped

concretearchbridgewithtwoequalspans,andananalysisofdynamicpropertywaspreformed,andmeasuredimpulsedatawasusedtoverifytheanalysisresult.Responsespectrummethodandtime2historymethodwasusedforanalysisoflongi2tudinal,transversal,andverticalearthquakeresponse.Keywords　highwaybridge,box2shapedarchbridge,modalanalysis,responsespectrum,earthquakewave,time2historyresponse

DesignandComputationoftheBridgedGutterforShenzhenReservoir

HeXiaobin

Abstract　ThemainbridgeofBeipanjiangRiverBridgefeatures236mupperloadingsteeltubularconcretearch.Anintroductionisgiventotheuniquetech2nologyusedlikegussetplateconnectingtop,bottomchordtubeandwebmember,theЖ2shapedtransversebracingforarchrib,rigidframepierbearing,andΠ2shapedreinforcedconcreterigidframe,etc,andtosuchdesignsasswingingbodyconstruction,ballhingeforswinging,concretepouringsequenceinsidearchrib,andswinginghingefortemporaryuseatthefootofarch,etc.Keywords　BeipanjiangRiverBridge,railwaybridge,archbridge,steeltubularconcrete,structuraldesign,swingingbodyconstruction

AnalysisoftheReliabilityofSurfaceDeformationofShieldTunnelBasedonNumericalSimulation

SongKezhi,WangMengshu

Abstract　ThebridgedgutterforShenzhenReservoiristhelargestsurfacestruc2tureofthewatersupplynetworkinShenzhen.Prestressingtechnologywasusedtoincreasethelongitudinalspanoftheboxconcretegutterandtoimproveitscrack2proofandseepage2proofperformance.Anintroductionisgiventothedesignofthegutterandcomputationofstaticforce.Keywords　prestress,boxgutter,design,computation,ShenzhenReservoirDynamicAnalysisoftheSinglePylonCable2stayedYintanBridgeoverYel2lowRiver

LiuLan

Abstract　Thepaperpointsout,basedontheanalysisofcausesforgroundsur2facedeformationinducedbyshieldtunnel,thattheparameteroftunnelrockandshieldexcavationwillcausedisturbancetorockmasswithgreatrandomness,thusresultintheuncertaintyofsurfacedeformation.ANSYSfiniteelementprogramwasusedfornumericalsimulationtesttoobtaindeformationdata,andonthebasisofwhich,primaryimpactelementwasdefinedrandominputvariate,andsurfacedeformationwasdefinedrandomoutputvariate.Monte2Carlomethodwasusedtosimulatethestatisticsofsurfacedeformation,andacomputationofprobabilityoffailureanddegreeofreliabilitywasconducted.Keywords　shield,surfacedeformation,random,degreeofreliabilityConstructionofFenghuoshanTunnelPassingUndergroundIceLayer

CaoXinfeng

Abstract　Anoverallcomputationandanalysiswasmadeofthepylon,andthe

impactofmaingirderlongitudinalandtransverseelasticconfinementonthedy2namicpropertyandearthquakeresponseofthemainbridge,includingestablish2mentofcomputationmodel,computationofdynamicproperty,http://www.77cn.com.cnputationresultindicatedthatelasticconfinementforop2erationandthefloatsystemforearthquakehavehighaseismicperformance.Keywords　singlepyloncable2stayedbridge,floatsystem,elasticconfinement,dynamicanalysis

DesignLoadofRailwayFerryTrestleBridgeovertheSea

LiXiaojiang,YanGuiping

Abstract　Anintroductionisgiventoeffectivemeasuresagainstthedeepunder2

groundicelayer,whicheasilythawsandcollapseswhenheated.Suchmeasuresinclude,smoothblastwithlesschargevolume,heatinsulation,coldairventila2tioninsummer,rapidandeffectivesealingofsurroundingrock,acceleratingtheliningoftunnel,installationofheat2insulatingslab,andmonitoringoftempera2ture,etc.Keywords　railwaytunnel,plateautunnel,undergroundicelayer,constructiontechnology

DesignofCable2stayedSteelStructureCanopy

LiHongbiao,YuYang

Abstract　Railwayferrytrestlebridgeovertheseaoperatesunderspecialcondi2tionsandbearstheeffectoftide,wind,rain,andwave,etc.Thespecialfunc2tionandstructureofthebridgereceivesspecialactionforce.Thecomputationmethodoftheforce,classificationofload,andprinciplesforloadcombinationwasputforward.Keywords　railwayferry,trestlebridge,load,designCausesforEarlyStageCracksontheSurfaceofConcreteStructureatSe2vereColdAreaandPreventativeMeasures

Abstract　Ananalysiswasmadeoftheselectionofinitialtensionalforceofthecable2stayedcanopy,theforce2bearingcharacteristics,andthedesignofrelevantmembersandnodaljoints.Arationalforcestructurewasobtained.Keywords　steelstructurecanopy,cable2stayedsystem,initialstress,displace2ment