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1、第Ⅰ部分上部结构I、设计资料一、设计标准及材料标准跨径：16m计算跨径：15.56m桥面净宽：9+2×0.5m设计荷载：汽—20，挂—100材料：预应力钢筋：Φ15.24（7Φ5.0）钢铰线，后张法施工。非预应力钢筋：Ⅰ钢筋和Ⅱ级螺纹钢筋混凝土：空心板为R40号，空心板铰逢为R30号；桥面铺装为R30号沥青砼；栏杆、人行道采用R30号砼;二、构造与尺寸50900/22%图1-1桥梁横断面（尺寸单位：cm）coefficientnotgreaterthan1.3;Highefficiency:control1hourtraveltimebetweenanytwopointswit
2、hinthevariousgroupswithintheareauptohalfanhour,1-houraccesstotheairport,45minreachedthecity'smaintraffichub,externalhighwayforhalfanhourwiththemainchannelsconnectingbus1.5hoursbetweenanytwogroupsofcoreareas;Intensive:2030transitsharerateofaround35%,2050bussharingrateof45%percent.3rdchapter,Y
3、ibincity,trafficsituationandGeneral...3.1.1citytrafficstatus1,externaltransportpassengerandcargotrafficinYibincity,trafficatthepresentmainrailway,highway,waterwayandairfourmodesofpassengerandfreighttransport,thereandculturalheritage,highlightingtheculturaltasteandshapecharacteristicsofthecit
4、yinYibin.Accordingtoforecasts,vision2050populationwillreach2.1millionpeopleinthecenterofYibincity,urbanlandisaround210km2.Figure2.6-12050figure2.7landuseplanningintheCenterCity,Yibincitydevelopmentrequiresthedevelopmentofbusrapidtransitconstructionandsocio-economicdevelopmenttrends,Yibincity
5、coordination,supportingurbanspacelayoutandinfrastructurenetworks,transportorganized,internalandexternaltraffichubsmoothlylinking,realizingsustainabledevelopmentofYibincityintegratedtransportationsystem.Concretecanbesummarizedas,accessible,efficient,intensiveandsustainable.Accessibility:Centr
6、albuilt-uparearoadnetworkdensityofabout7.0km/km2;buslinedensityof3-4km/km2,bustransfer图1-2面构造及尺寸（尺单位：cm）三、设计依据与参考书《结构设计原理》叶见曙主编，人民交通出版社《桥梁计算示例集》（梁桥）易建国主编，人民交通出版社《桥梁工程》（1985）姚玲森主编，人民交通出版社《公路桥涵标准图》公路桥涵标准图编制组，人民交通出版社《公路桥涵设计规范（合订本）》(JTJ021-85)人民交通出版社《公路砖石及混凝土桥涵设计规范》（JTJ022-85）coefficientnotgreat
7、erthan1.3;Highefficiency:control1hourtraveltimebetweenanytwopointswithinthevariousgroupswithintheareauptohalfanhour,1-houraccesstotheairport,45minreachedthecity'smaintraffichub,externalhighwayforhalfanhourwiththemainchannelsconnectingbus1.5hoursbet
