与地铁共建的大型高铁站房上部大跨度楼盖结构设计

Structural design of big-span floors of large high-speed-train railway station with subways

某大型高铁综合枢纽站集站房、高铁及地铁于一体。主站房为地下2层、地上2层框架结构,由于下方地铁通行、地铁换乘和建筑布置的要求,上部楼盖结构需要有较大的柱网尺寸。经过经济性、技术型分析,南、北站房进站层(地铁换乘大厅上方)采用混凝土柱(内插型钢)+主、次钢桁架+钢次梁楼盖结构;中区高架候车层采用钢管混凝土柱+预应力混凝土楼盖结构体系。结构设计针对本工程不同区域的柱跨特点,结合建筑要求,采用不同的楼盖结构方案,在保证结构安全和满足建筑功能的前提下,力求结构设计的先进性和经济性。

The large high-speed-train integrated transportation hub includes station,railways and subways. The main railway station has a 2-storey basement and a 2-storey frame structure on the ground. For the subway underground with interchanges and other building function,the floor structures should be designed with large column space. According to the analysis of economy and technical feasibility, the north and south entrance level( above the subway integrated transportation hub hall) use the reinforced concrete column( steels inside) and roof structure of main and secondary steel trusses and secondary beams. The middle level overhead waiting hall use concrete filled steel columns and pre-stressed concrete floor structures. Different roof structures are used in this project based on various column spaces. With satisfaction of structural safety and building function,the advanced and economic structural design are achieved.