正阳隧道围岩变形与支护结构受力特性研究

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1、分类号密级U45单位代码10618学号106330706墨灰交通戈肇硕士学位论文论文题目：正阳隧道围岩变形与支护结构受力特性研究StudyontheSurroundingRockDeformationandMechanicalCharacterofSupportStructureforZhengyangTunel研究生姓名：王震导师姓名、职称：徐林生教授博士生导师申请学位门类专业名称：论文答辩日期学位授予单位工学防灾减灾工程及防护工程答辩委员会主席：熊有言2009年3月评阅人：熊有言涂忠仁ABSTRACTThispaperdependsonZhengyangTunne

2、l，throughmeasuredinformationatconstructionfield，combinedelastic—plasticityfiniteelementnumericalsimulation，studyonthesurroundingrockdeformationandthecharacteristicsofthesupportingstructureunderpressure：(互)Usingtheinformationoffieldmonitoringmeasuring，makeparticularlyanalysisonthesurroun

3、dingrockdeformationandthecharacteristicsofthesupportingstructureunderpressurewhenthetunleWasexcavated．Theresultofanalysisindicatesthattheconvergenceofsurroundingrockdeformationhasastrongspatialandtemporalcharacteristics，theinitialdeformationislargeandquickdevelopment，differentmonitoring

4、sectionshasdifferentdeformationcharacteristics，andthedeformationhassignificantnonuniformity；characteristicsofrockstressalsohasaspatialandtemporalcharacteristics，therockstressoninitialsupportininitialstageisquickandbig，andittakesalongperiod，inthesamecross-sectionalsohavedifferentstressch

5、aracteristics，andphenomenaofbiasisexist晰thvaryingdegrees．(g)Expoundthebasictheoryoffiniteelementsimulationtoundergroundengineeringconstructionprocess．UsinglargescalefiniteelementsoftwareANSYS10．0，makesfiniteelementnumericalsimulationtotheconstructionprocessoftheproject．Separatelyanalyze

6、dthesurroundingrockdeformationandthecharacteristicsofthesupportingstructureunderpressureinthesegmentoftunlewithshallowdepthandpartialpressedandthesegmentofturtle、Ⅳimweakbrokenrock．Throughanalysis，itgets：biasintheprocessoftunnelconstructiondoesmoreimportanttosurroundingrockdeformationand

7、thecharacteristicsofthesupportingstructure；becauseofbias，extremumofboltaxialforce，axialforce、shearstressandofbendingmomentofconcretesprayedallappearatthethickerrocksideofthetunnel；inthesegmentofturtlewithweakbrokenrock，resultinginalargersurroundingrockdeformationbecauseitisdiff