南京南高架站桥梁设计

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1、52桥梁建设2010年第1期文章编号：1003—4722(2010)01—0052—03南京南高架站桥梁设计雷素敏(中铁第四勘察设计院集团有限公司，湖北武汉430063)摘要：南京南站有3个车场、15个站台、28条铁路线，根据其使用功能和规模，分站房区正线桥、站房外桥梁和站台梁设计3个部分，进行高架站桥梁设计。站房区正线桥设计为3座独立的双线桥梁，采用钢筋混凝土连续刚构结构，孔跨布置为2×21m+3x24m+2x21m；站房外桥梁采用14座独立的双线桥，为3×21m的钢筋混凝土连续刚构；站台梁采用钢筋混凝土结构，为防止站台在地震

2、作用下落梁、减少火车运行时对站台梁的振动作用，每孔站台梁下设角钢防落梁，采用减震支座。选择8种车型，16O～350km／h、375～420km／h2种列车速度范围对京沪正线桥梁进行动力分析，结果表明桥梁动力性能、车体振动加速度、脱轨系数、减载率均满足指标。关键词：高架结构；钢筋混凝土结构，连续梁；刚构桥；桥梁设计中图分类号：U442．5文献标志码：ABridgeDesingforNanjingSouthElevatedRailwayStationLElSu—min(ChinaRailwayTiesiyuanSurveyandDe

3、signInstituteGroupCo．，Ltd．，Wuhan430063，China)Abstract：Thereare3marshallingyards，15platformsand28railwaylinestobearrangedintheNanjingSouthRailwayStation．InaccordancewiththeservicefunctionsandscaleoftheSta—tion，thedesignofelevatedbridgesfortheStationisdividedinto3parts

4、ofthebridgesforthemainrailwaylinesinsidetheStationbuilding，thebridgesoutsidethebuildingandthebridgesservingasplatforms．Thebridgesforthemainlinesarethe3independentdouble—trackbridgesthataredesignedasthereinforcedconcrete(RC)continuousrigid—framestructureseachwithspana

5、rrangement2×21m+3X24m+2×21m，thebridgesoutsidethebuildingarethe14inde—pendentdouble——trackbridgesthatarealsodesignedastheRCcontinuousrigid——framestructureseachwithspanarrangement3×21mandthebridgesservingasplatformsaredesignedastheRCstructures．Topreventthebeamsofthepla

6、tformsfromdroppingoffintheeventofearthquakeandtoreducethevibrationcausedbythetrainstothebeams，theanglebarsthatcanpreventthebeamsfromdroppingoffaretobearrangedunderneaththebeamsandtheanti—vibrationbearingsaretobeprovided．8typesofthelocomotivestorunwithinthespeedof160~

7、350km／hand375～420km／hareusedtoconductthedynamicanalysisofthebridgesonthemainlinesofBeijing—ShanghaiHigh—SpeedRailway．Theresultsoftheanalysisshowthatthedynamicbehaviorofallbridges，theaccelerationoftrainvibration，thederailingcoefficientsandvibrationreducingratiocanallm

8、eetthedesignedindices．Keywords：elevatedstructure；reinforcedconcretestructure；continuousbeam；rigid—framebridge；bridgedesign收稿日期：2009