English：

In the urban interchange supporting pipe network system, the traditional 2D design method haslimitations such as insufficient spatial coordination, information silos, and lack of dynamic analysis inspatial analysis, collaborative management and dynamic updates. Taking a large fully-interconnectedproject as an example, by integrating BIM and GIS technologies, a 3D model of the urban interchangesupporting pipe network covering urban topography and geological parameters is established. This modelis used for construction simulation, collision detection, 3D visualization to guide construction, andintelligent management, significantly enhancing the overall efficiency of construction management. Itenables precise capture and efficient management of pipe network data, effectively reducing data errorsand omissions as well as repetitive work, ensuring the smooth progress of construction projects. Thesuccessful application of BIM+GIS technology in the on-site management of urban interchange supportingpipe networks lays a solid foundation for the construction of smart cities, it not only improves theintelligence level of urban infrastructure but also promotes information sharing and collaborative operationsacross departments and fields, accelerating the modernization process of the urban governance system.