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)》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

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-