摘要:桥梁是一个具有一定象征意义的公共建筑，随着城市建设的发展，对桥梁设计的要求也越来越高。采用BIM+GIS技术辅助桥梁设计、可视化表达设计意图、协助领导决策和传递成果信息具有优于传统方式的效果。本文采用无人机倾斜摄影技术获取项目区域的实景模型，创建三维可视化的设计环境，利用3DGIS平台SuperMap GIS将GIS数据和桥梁BIM数据进行融合构建数字孪生，并发布成在线服务方便随时随地查看，对BIM+GIS在桥梁初步设计中的应用和在交通基础设施信息化中的作用进行了有效探索。

Abstract: Bridges are public buildings with certain symbolic significance. With the development of urban construction, higher requirements are proposed for the bridge design. The application of BIM+GIS technology is able to assist bridge design, express design intention visually, assist leaders in decision-making, and transmit achievement information, which is superior to traditional methods. This paper adopts the UAV tilt photography technology to obtain the real scene model of the project area, and creates a 3D visual design development. A 3D GIS platform, SuperMap GIS, is applied to integrate GIS data with bridge BIM data to build a digital twin, and publish it as online service for convenient viewing anytime and anywhere. The study has effectively explored the application of BIM+GIS in the preliminary design of bridge and its role in the informatization of traffic infrastructure.