摘要：本设计主要针对贵阳市城市轨道2号线森龙区间的高架桥进行结构设计。城市轨道交通高架桥，是承受轨道交通荷载的高架系统，它所承受的列车活载比一般的铁路的荷载要小，速度相对较慢，对结构的动力作用比较小，因此对于贵阳市森龙区间段的工程条件进行高架结构体系进行选型，最后决定以简支箱型梁桥的形式进行结构设计。根据贵阳森龙区间的工程要求，本设计高架桥的总跨度为165m，属于大桥范畴，根据我国城市轨道交通、城际铁路区间简支梁桥的标准跨径，将该区间的高架桥进行分跨，分成3×25m+3×30m=165m，本设计取其中30m作为设计跨度，进行结构设计。由于受到时间和计算难度限制，本设计仅对高架桥的上部结构进行设计。设计的过程为先对高架桥的铁道桥面板进行结构设计，设计的桥面宽度为10。8m，对桥面上的各种基础设施进行荷载计算分析，接着对主梁进行截面尺寸以及各个部分细部尺寸进行拟定。通过选型对比分析，设计的截面形式为箱型截面，箱型截面的整体刚度比较大，符合城市景观要求。从设计的难度考虑，最后选择了单箱单室结构进行设计。接着进行了详细的主梁结构内力以及变形计算，截面的主应力计算，预应力阶段和使用阶段主梁截面的强度和变形验算，对高架桥进行配筋计算以及配筋验算，锚固区局部强度验算和挠度的计算等，最后进行横纵断面各个部分的平面图进行CAD绘图，整理得出本设计的最终成果。80869

毕业论文关键词： 城市轨道交通；轻轨；高架桥；简支梁桥；箱型梁桥；预应力损失；应力验算

 The design of Guiyang light rail line 2 in senlong Section , the right line viaduct structure interval 

Abstract：This design is mainly to the structure design of the viaduct in Guiyang city rail line 2 dragon interval。 City rail transit viaduct is elevated rail transit system under load, it can train live load load than the general railway to be small, relatively slow, dynamic effects on the structure is relatively small, so for accommodation, interval in Guiyang City engineering conditions of elevated structure system selection, and finally to the form of bridge structure design。 According to the engineering requirements of Guiyang Senlong interval, the total span design of viaduct is 165m, which belongs to the category of the bridge, according to the city rail transit in China, intercity railway section beam Standard span bridge, the viaduct of the interval of the cross, pided into 3 * 25m+3 * 30m=165m, this design takes 30m as the design span, structure design and calculation。 Due to time limit, this design only on the viaduct superstructure design。 Process design for railway bridge panel on the viaduct structure design, the width of the bridge design for 10。8m, the infrastructure on the deck load calculation analysis, then the main beam section size and each part detailed dimensions worked out。 Through the selection of comparative analysis, section design for box section, The whole box section stiffness is relatively large, in line with the city landscape requirements。 Considering the difficulty of the design, the final choice of single box single room structure design。 Then the main beam internal force of the structure and the detailed calculation of deformation, the main section of the stress calculation of prestressed phase and use phase of the main beam and the intensity of deformation。 Calculations, and the deflection of the local strength of anchorage zone, reinforcement calculation and reinforcement calculation of the viaduct and so on, finally, the horizontal and vertical section plane of each part of the CAD drawing, sort out the design of the final results。

KeyWords：Urban rail transit, light rail, viaduct, simply supported beam bridge, box girder bridge, prestress loss, stress calculation