The Ningbo Zhongxing is a cable-stayed bridge with single-cable-plane and low-tower, which possesses the largest span currently in the world. The construction condition of the bridge is harsh, the bridge structure is complex, and the construction site is limited. From the very beginning of the design phase, the projects starts adopting the independent developed software for the BIM forward design, which employs modern technologies including the tilted photography and virtual reality. This is for the first time that the integration of tilted photography and virtual reality is applied in the construction of domestic large municipal bridge project in China. The performance analysis and design optimization of the BIM model are carried out with a variety of software, which lays a good foundation for the application of BIM technology and its future development.

This paper firstly analyzes theexisting problems in thedomestic smart city construction in China. Then, the paper puts forward a structure for the cloud platform of smart city, and discusses the goal for smart city construction, as well as the implementation procedures, and the construction and operation modes. Finally, the industrial chain of smart city cloud platform is also revealed.

Ningbo Meishan Chunxiao Bridge is the first all welded steel bridge with vertical shift type of double layer. This article introduces the process of making three-dimensional forward design of the bridge by independently developed BIM software, shares multiple specialty data information through unified management of platform. It also combines several applications to optimize BIM technology. Among them, the successful use of new technology such as unmanned aerial vehicle terrain survey, virtual reality, test assembling of digital scan also laid a good foundation for the BIM development of the similar projects.

Shanghai Riverside Passageway & River-Crossing Tunnel Project is a major Shanghai municipal project with complex traffic system, various types of structures and relative high design difficulty. In this project, we propose a whole life-cycle BIM application process, and we apply BIM technology from general design to specific design in all disciplines. We create design components catalog for municipal transportation projects, and conduct secondary development based on Dassault Systeme 3D Experience platform, which contributes to multiple-disciplinal rapid modeling and parametric design, as well as scenario optimization and design development based on the BIM model. Finally, for the metallic structure, we propose the solution from scenario design, analysis, and optimization to drawing, which lays the foundation for future digital manufacturing.