PAGEVI摘要本桥位于云南昭通市钟鸣至彝良县三级公路K2+963处，桥梁平面线为直线，与水流方向正交，桥纵向坡度为0%，桥面横坡采用2.5%的双向横坡。根据所给资料，拟定了预应力混凝土简支T形梁桥、预应力混凝土连续T形梁桥、预应力混凝土连续小箱梁桥三个桥型方案。通过方案比选，推荐方案为T形连续梁桥，孔径布置3×30m，桥梁全长103.85m。桥墩采用钢筋混凝土柱式桥墩，采用刚性扩大基础，桥台采用U型桥台。上部结构的设计与计算，进行了结构细部尺寸拟定、静活载内力计算、配筋设计及控制截面强度、应力验算，活载变形验算等。经分析比较及验算表明该设计计算方法正确，内力分布合理，符合设计规范的要求。下部结构计算，计算由上部荷载到桥台的台帽的内力。最后，进行下部结构验算以及地基承载力验算。关键词：预应力、连续梁桥、柱式桥墩、刚性扩大基础AbstractThebridgeislocatedinzhongmingluozeriverofzhongmingtoyiliangyunanprovincehighwayK2+963.Bridgehorizontalalignmentisthestraight-lineanditisorthogonaltotheflowdirection.Bridgeverticalgradientis0%.Thebridgecrossusinga2.5%slope.Accordingtothegivendata,threebridgeoptionsaredeveloped.Thefirstprogramistheprestressedconcretesimplysupportedbridge,thesecondprogramistheprestressedconcretecontinuousgirderbridge,thethirdprogramistheprestressedconcretecontinuoussmallscaleboxgirderbridge.Throughthecomparison,thesecondprogramisrecommendedtobechose,whichthetotallengthis103.85metesandtheapertureaperturelayout：30+30+30meters.Thebridgeusecolumnbridgepier.accordingtobearinglayeroffoundation,bridgeusetheexpansionofpile.TheabutmentisU-abutmentabutment.Inthesuperstructures，throughdrawingupofstructure’sdimension,internalforcecalculationofdeadandlivingload,prestressedsteeldesign,hypoforcecalculation,assessmentofprestressingloss,checkingcomputationofkeysectionintension,stress,livingloaddistortion,Theconclusioncanbedrawnthatthedesignisuptothedesigncodesforbridge.Inthesubstructure，theload,whichistransferedfromthesuperstructures,arecalculated.Finally,thebearingcapacityofsubstructureandthegroundalsobechecked.KeyWords:Prestressforce;Continuousgirderbridge;Columnarpier;Rigidspreadfoundation毕业设计说明书目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc296150032"第一章桥型方案比选PAGEREF_Toc296150032\h1HYPERLINK\l"_Toc296150033"1.1设计桥型的确定PAGEREF_Toc296150033\h1HYPERLINK\l"_Toc296150034"1.2设计方案比较PAGEREF_Toc296150034\h2HYPERLINK\l"_Toc296150035"第二章推荐方案尺寸拟PAGEREF_Toc296150035\h3HYPERLINK\l"_To