软岩隧道支护参数优化分析-(6188)

软岩隧道支护参数优化分析-(6188)

ID:33093396

大小:6.17 MB

页数:72页

时间:2019-02-20

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1、软岩隧道支护参数优化研究AbstractLargedeformationofsoftrockisinfluencedbymanyfactors,sothereisnotunifiedandrationalexperiencetodrawoninsupportparameterofsoftrocktunneldesign.ShuangfengtunnelprojectonMuSuitrackbeingtheresearchobject,thispaperusesfiniteelementanalysissoftware(MIDASandANSYS)toconductopti

2、mizedresearchonthistunnelsupportingparameters,whichbasesonthespecificsoftrockdeformationandsupportstructuralcharacteristicsDK466+565mileagesegmentinShuangfengtunnelaswellascombineswithmonitoringmeasurementtestintheconstructionsite.Themainresearchcontentsareasfollows:(1)Monitoringmeasureme

3、nttestintheconstructionsite.Constructionisguidedbyfeedbackinformationfrommonitoringmeasurementandthetunnelconstructionisunderdynamicmanagement.Monitoringisstrengthenedinpoorlocationofweakrocktoensureconstructionsafety.(2)Displacementbackanalysisofsurroundingrockparameters.Thispapermakessi

4、temonitoringmeasurementdataforcurveregressionbasedontheprincipleofleastsquareswithExcelsoftwaretopredictthefinaldisplacement.ThenbackanalysisofsurroundingrockmechanicsparametersisconductedanditsinversionresultserrorischeckedaccordingtoBPneuralnetworkofMATLAB.(3)Supportparameteroptimizatio

5、nofShuangfengtunnel.CombiningwithconstructionmethodandsupportingdesignandusingMIDAS-GTSfiniteelementanalysissoftwareandstratigraphic-structuralmodel,thispaperwillanalyzethefactorthatinfluencesstabilityofsurroundingrockandsupportingstructure.Themainoptimizationincludeslengthsetofthefeet-lo

6、ckpipes,gradeandthicknessofshotconcreteandsteelarchtypeandspacing.What’smore,italsousesfiniteelementanalysissoftware-ANSYSandload-structuremodeltoconductinternalforcecalculationondifferentthicknessofShuangfengtunnel’ssecondaryliningandthenoptimizessupportparametersofShuangfengtunnelthroug

7、hnumericalsimulationresults.Theresultsshowthat:①Thelengthofthefeet-lockpipesismuchlonger,itismorebeneficialforcontrollingconvergenceanddeformationofsurroundingrockandstressofsupportingstructures.undertheconsiderationoftheextentoftheimprovementeffectandforce,thefeet-

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