旧桥整体加宽中若干问题的研究

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1、日桥熬体加宽中若干问题的研究y870177TheReasearchaboutSomeQuestionsoftheOldBridges’BeingEntirelyBroadened作者姓名吐生学位类墅堂压獗±学科、专业．噬遮王猩研究方向越一壶道路董叠筮导师及职称拯盛越麴援2006年5月Withthedevelopmentoftrafficcauseofourcountry，thetrafficofhighwaybombingeverday，somehighwayhavetoberedesigned

2、becausetheycannotmeetneeds．Whenthehighwayneedtobebroadened,Wemustredesignthebridgesandtheculverts。Whenweredesignthesebridgeswhichcannotmeetneeds，load—bearingcapacityquestionscomeupwiththem．So，1wanttostudysomeofthemandhopethatIcanbringsomehelptosomeen

3、gineersofbridges．Wedealwiththesebridgeswhichcannotmeettheneedsofcriterion，Comparetotechniqueandeconomics，Weaddthesebridges’widthonthebasisofnewstandardsinordertomakefulluseoforiginalbridges．Thebridgeswhichcannotmeettheneedsofcriterionhavetobeauthenti

4、cated，repaired，reinforcedandredesigned．Thepaperthoroughlyanalysesstipulationconditionofoldbridges’wholeredesign,makesuseofthetheoryonshrinkage，cheep，andfoundationsubsidechanges，carriesonrelevantprojectcomparison．chooseandsystematicalanalysis，dealswit

5、hthelongitudinalsew’Sshearingdeformationbetweenthenewandoldbridges，choosesproperconjuctioncraftandmethod，solvesthequestionsoftheoldbridges’beingentirelybroadened，makesthenewandoldbridgesworkharmoniously，inordertomeettrafficneed．IverifythemwithTbeambr

6、idgewholeredesignofFoshan—Kaipingsuperhighwayandprovidesomeexperiencetodesignthesebridgeswhichneedtobebroadenedinthefuture。Keywords：oldbridge，beingentirelybroadened，shrinkage，cheep，subsidence插图清单图2．1车辆荷载横向布置⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯1l图2．2旧桥加宽改建设计流程框图⋯⋯⋯

7、⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯13图3．1老化理论在不同加载龄期的徐变系数⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯28图4．1佛开高速公路项目地理位置图⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯3l图4．2T梁整体连接断面图⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯34图4．3新旧T梁全桥仿真空间模型⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯37图4．4刚性连接方案一连接构造图⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯38图4．5刚性连接方案二连接构造图⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯38图4．6旧桥中梁跨中截面横断面⋯

8、⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯39图4．7新桥中粱跨中截面横断面⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯39图4．8连接处旧桥边梁跨中截面横断面⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯39‘图4．9连接处新桥边梁跨中截面横断面⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯39图4．10不拼时和一年后相拼(方案一)时恒载下的支座反力⋯⋯⋯⋯⋯⋯⋯40图4．11不拼时和两年后相拼(方案一)时恒载下的支座反力⋯⋯⋯⋯⋯⋯⋯41图4．12不拼时和一年后相拼(方案二)时叵载下的支座反力⋯⋯⋯⋯⋯⋯⋯⋯41图4．13不拼时和