天津大虹桥在子牙河与北运河交汇处跨越子牙河,桥中线与河流成45°交角。该桥两台一墩,上部结构为两跨连续结合梁,跨径为87.5+72.5m。跨度的选择考虑了水中墩尽量避开桥墩圬工,并使北岸主航道有较大的通航宽度。桥面宽30m,其中车行道24m,两侧人行道各3m。设计荷载:车辆荷载按6车道汽—20及挂—100,并按挂—150检算;人群活载为400 Tianjin Hongqiao in Ziya River and the North Canal interchange across the Ziya River, the bridge midline and the river into a 45 ° angle. The bridge two piers, the superstructure is a two-span continuous bond beam span of 87.5 +72.5 m. The choice of span takes into account that the pier in the water should try to avoid the piers and make the main navigation channel of the north bank have a larger navigable width. The bridge deck is 30m wide, of which 24m on the carriageway and 3m on both sides. Design load: vehicle load by 6-lane steam -20 and hang -100, and peg-150 count; live population of 400