(广东省建筑设计研究院，广州510010)
［提要］广州市珠江新城核心区市政交通项目的主体结构从地铁5号线隧道上方跨越而过。结构设计中针对地铁保护的要求以及工程结构布置、岩土地质状况、各部位与地铁隧道的空间关系等具体条件，通过各类计算分析进行了多种结构方案对比，并将最终方案落实到结构设计中，同时提出了具体措施与要求。结合该工程上述方案对比及设计措施，为跨越地铁隧道的同类结构提供了分析与设计方面的经验与参考做法。
［关键词］跨越地铁隧道；预应力；托换；地铁保护
Analysis and Design About Structure Spanning over Subway Tunnel/Lin Jinghua，Chen Xing，Xiang Qian，Ou Yanjun(The Architectural Design and Research Institute of Guangdong Province, Guangzhou 510010, China)
Abstract: In the municipal project of Guangzhou Zhujiang New Town Core Area, parts of the main structure span are over the No.5 metro tunnel. Due to the critical safety requirement of the tunnel, analysis and comparison are applied in technical schemes about the spanning structure. The optimum scheme is deepened and implemented in structural design. Summarized from the design procedure above, experience and measures for similar span-over-tunnel structure are provided.
Keywords: spanning over subway tunnel; prestress; transforming support; subway protection