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基于三维随机坍塌模型的软岩隧道掌子面抗震稳定性的可靠度分析（英文）.docx

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基于三维随机坍塌模型的软岩隧道掌子面抗震稳定性的可靠度分析（英文） Title:ReliabilityAnalysisofSeismicStabilityofSoftRockTunnelFacebasedon3DRandomCollapseModel Abstract: Theseismicstabilityoftunnelfacesisofutmostimportanceforensuringthesafetyoftunnelstructures.Inthisstudy,thereliabilityanalysisoftheseismicstabilityofsoftrocktunnelfacesisconductedbasedonathree-dimensionalrandomcollapsemodel.Theobjectiveistoprovideacomprehensiveunderstandingoftheuncertaintiesassociatedwiththestabilityassessmentandtoproposereliabledesignguidelinesforsoftrocktunnelconstructioninseismicregions.Theanalysistakesintoaccountvariousfactorssuchasgeotechnicalproperties,seismicloadings,andstructuraluncertaintiestoevaluatethereliabilityofthetunnelfaceunderseismicevents. 1.Introduction 1.1Background 1.2Objective 1.3ScopeofStudy 2.LiteratureReview 2.1SeismicStabilityofSoftRockTunnels 2.2ReliabilityAnalysisofTunnelStructures 2.3RandomCollapseModels 3.Methodology 3.1GeotechnicalPropertiesandSeismicLoadings 3.2Three-DimensionalRandomCollapseModel 3.3ReliabilityAnalysisApproach 4.UncertaintyAnalysis 4.1GeotechnicalUncertainties 4.2SeismicLoadingsUncertainties 4.3StructuralUncertainties 5.ReliabilityAnalysisResults 5.1ProbabilityofFailure 5.2SensitivityAnalysis 5.3DesignGuidelinesforSeismicStability 6.CaseStudy 6.1CaseDescription 6.2ApplicationofReliabilityAnalysis 6.3ComparisonwithConventionalDesignMethods 7.Discussion 7.1InterpretationofResults 7.2LimitationsandAssumptions 7.3RecommendationsforFutureResearch 8.Conclusion 8.1KeyFindings 8.2ContributiontoEngineeringPractice 8.3FinalRemarks Thepaperaimstoinvestigatetheseismicstabilityofsoftrocktunnelfacesusingathree-dimensionalrandomcollapsemodelandtoprovidereliabledesignguidelinesforengineers.Byconsideringvariousuncertainties,thereliabilityanalysiswillcontributetobetterunderstandingtheperformanceandpotentialfailuremodesofsoftrocktunnelfacesduringseismicevents.Theproposeddesignguidelinescanbeemployedinpracticetoenhancethesafetyandstabilityofsoftrocktunnelsinearthquake-proneregions.