上海轨道交通17号线西延伸高架区间总体设计

Overall Design of Elevated Section for West Extension of Shanghai Rail Transit Line 17

摘要:

以上海轨道交通17号线西延伸工程为背景，系统阐述了高架区间桥梁设计的关键技术。重点提出以30 m跨径为主的预制U型梁方案，兼顾结构经济性、施工效率与景观协调性。针对特殊节点，跨Ⅲ级航道拦路港采用（100+180+100）m中央索面矮塔斜拉桥，结合江南水乡文化进行景观设计。跨沪渝高速公路采用（75+111+75）m曲线变宽连续梁，通过结构优化，实现复杂线形悬臂浇筑方式跨越。工程融合结构力学与美学理念，形成标准化设计与特色化创新相结合的范例，对同类工程具有参考价值。

Abstract:

Taking the Shanghai Rail Transit Line 17 West Extension Project as the background, the key technologies in the design of elevated section bridges are systematically elaborated. The focus is on proposing a precast U-shaped girder scheme mainly with the 30m spans, which takes into amount the structural economy, construction efficiency and landscape compatibility. For the special nodes, a (100+180+100)m central cable-plane low-pylon cable-stayed bridge is adopted to span the Lanlu Port of Grade III waterway, and the landscape is designed in combination with the water town culture of the Jiangnan region. A (75+111+75)m curved variable-width continuous girder is used to span Shanghai - Chongqing Expressway. Through structural optimization, the spanning in complex linear cantilever pouring methods is achieved. The project integrates structural mechanics with aesthetic concepts, forming an exemplary model combining standardized design with specialized innovation, which has a reference value for similar engineering projects.