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时间:2019-05-11
《临江软土地基堤路结合工程合理拼接台阶尺寸研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、第37卷,第5期公路工程Vo1.37,No.52012年10月HighwayEngineeringOct.,2012临江软土地基堤路结合工程合理拼接台阶尺寸研究陆长兵,骆俊伟。,高昌泉,祁长青(1.南京市浦口新城开发建设指挥部,江苏南京211800;2.河海大学地球科学与工程学院,江苏南京210098)[摘要]堤路拼接工程中,既要考虑到新老路堤的变形协调性,又要不影响到老堤的防洪作用,因此合理的台阶尺寸选择非常重要。通过有限元模拟,分析了不同尺寸拼接台阶对于堤路拼接质量的影响。模拟结果表明,设置拼接台阶能够有效改善拼接处的剪应力分布情况,缓解坡脚的应力集中,使新老
2、路基更加有效衔接,但过大的台阶尺寸也会降低拼接质量,应控制开挖台阶尺寸。合理的台阶尺寸应同时考虑拼接处与两侧路基的变形协调性,同时也应考虑对既有老堤稳定性的影响。综合考虑各不同断面设置方案的数值模拟结果,确定最优的拼接台阶尺寸为0.8×1.85m。研究结果将为堤路结合工程的设计和施工提供借鉴和指导作用。[关键词】堤路拼接工程;台阶尺寸;有限元模拟;应力分布;变形协调[中图分类号】U416.12[文献标识码】A[文章编号]1674—0610(2012)05一Ol15—04SplicingStepSizeSelectoftheBank-roadCombinationE
3、mbankmentonSoftGroundbytheYangtzeRiverLUChangbing,LUOJunwei,GAOChangquan,QIChangqing(1.HeadquartersoftheconstructionanddevelopmentofPuKouDevelopmentZone,Nanjing,Jiangsu211800,China;2.DepartmentofEarthScienceandEngineering,HohaiUniversity,Nanjing,Jiangsu210098,China)[Abstract]Duringthe
4、combinationofbankandroad,thecompatibilityofdeformationbetweentheoldandnewembankmentandtheinfluenceofnewembankmentonthefloodcontrolfunctionofoldbankarebothneedtobetakenintoaccount.Thus,theselectionofareasonablesplicingstepsizeisimportantinconstruction.Theeffectofsplicingstepsizeonemban
5、kmentsafetyisanalyzedusingfiniteelementmethod.Simulationresultsshowthatthesplicingstepcanmodi~thedistributionfeatureofshearstress,reducethestressconcentrationatthefootofslope,andalsoimprovethesplicingeffectbetweenthenewembankmentandoldbank.Whenthestepsizeexceedscertainvalue,however,th
6、esplicingeffectwilldecrease.So,practicalstepsizeshouldbeselectedforgivenengineeringconstruction.Consideringthecompatibilityofdeformationbetweentheoldbankandnewembankmentandtheeffectofnewembank.mentonthestabilityofoldbank,apracticalsplicingstepsizeisputforwardforRiversideAvenueofPukouN
7、ewCity,JiangsuProvince.Theoptimalstepsizeobtainedbysimulationis0.8X1.85m.Theresultscanthrowlightondesignandconstructionofthecombinationofbankandroad.[Keywords]combinationofbankandroad;stepsize;finiteelementsimulation;stressdistribu.tion;deformationcompatibility随着城市建设的发展,市区堤防的功能得到越作用及新
8、老路堤在强
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