通过对钢—混凝土组合结构与混凝土结构的比较,认为跨线桥采用组合结构具有较高的经济效益和社会效益。同时,结合背景工程设计实践,对钢-混凝土组合连续结构负弯矩区混凝土裂缝控制技术进行了简要的介绍,供工程设计人员参考。 By comparing the steel-concrete composite structure with the concrete structure, it is considered that the combined structure of the overpass bridge has high economic and social benefits. At the same time, combined with the background of engineering design practice, the steel-concrete composite structure of the continuous negative moment bending zone concrete crack control technology for a brief introduction, for engineering design personnel reference.