基于非均质边坡强度折减法的三维桥基边坡稳定性分析.docx

基于非均质边坡强度折减法的三维桥基边坡稳定性分析
摘要
建造现代桥梁需要在各种地质条件下建造桥基。对较陡峭的边坡开展三维稳定性分析，特定的地质环境是一个不可缺少的步骤。本文提出了一种基于非均质边坡强度折减法的三维桥基边坡稳定性分析方法，该方法可以估算边坡的稳定性和安全系数，并且比传统方法更准确。
本文介绍了该方法的基本原理和步骤。首先，通过三维边坡模型建立了边坡的几何形状和土层分布。利用地质探测资料确定了边坡中泥土的物理和力学性质，并应用折减系数对土层强度进行推定。然后，运用传统的稳定性分析方法、考虑土体的剪切强度折减系数，计算出边坡的稳定性系数，对边坡的稳定性进行评估。
本文利用现代化的计算机程序和图形化用户界面开发了一个三维建模软件，并运用该软件将提出的方法应用于一个实际的桥梁工程中。结果表明，使用非均质边坡强度折减法的三维桥基边坡稳定性分析方法提供了更为准确和可靠的结果，并可以帮助设计者更好地评估边坡的稳定性。
关键词：非均质边坡；三维边坡模型；强度折减系数；桥基边坡；稳定性分析
Abstract
Buildingmodernbridgesrequiresconstructionofbridgefoundationsonavarietyofgeologicalconditions.Three-dimensionalstabilityanalysisofsteepslopesisanessentialstepindesigningthebridgefoundationinaparticulargeologicalsetting.Thispaperproposesathree-dimensionalbridgefoundationslopestabilityanalysismethodbasedonthenon-uniformslopestrengthreductionmethod,whichcanestimatethestabilityandsafetyfactoroftheslopemoreaccuratelythantraditionalmethods.
Thispaperintroducesthebasicprinciplesandstepsofthismethod.First,thegeometricshapeandsoildistributionoftheslopeareestablishedthroughthethree-dimensionalslopemodel.Thegeologicalinvestigationdatawereusedtodeterminethephysicalandmechanicalpropertiesofthesoilintheslope,andthestrengthofthesoillayerwasestimatedusingreductioncoefficients.Then,thestabilitycoefficientoftheslopewascalculatedusingtraditionalstabilityanalysisconsideringthestrengthreductioncoefficientofthesoil,andthestabilityoftheslopewasevaluated.
Athree-dimensionalmodelingsoftwarewithamoderncomputerprogramandgraphicaluserinterfacewasdevelopedinthispaper,andtheproposalmethodwasappliedtoanactualbridgeengineeringprojectusingthesoftware.Theresultsshowthatthethree-dimensionalbridgefoundationslopestabilityanalysismethodbasedonthenon-uniformslopestrengthreductionmethodprovidesmoreaccurateandreliableresults,whichcanhelpdesignersbetterevaluatethestabilityoftheslope.
Keywords:non-uniformslope;three-dimensionalslopemodel;strengthreductioncoefficient;bridgefoundationslope;stabilityanalysis