摘要:在国家会议中心二期基坑项目中，为解决基坑深度大、周边环境复杂、工期紧张、支护形式多、安全要求严格的难题，在设计、施工全过程使用了BIM技术。设计阶段利用BIM技术正向设计的理论，结合三维可视化的特点，充分考虑周边建筑、构筑物及管线、地铁、环隧、下沉式道路的变形控制要求，对地下和地上环境进行了精细化的建模，优化设计方案。在施工过程中使用BIM技术进行施工方案和工序模拟，同时将物料、机械、安全监测等方面的信息集成到模型里，利用相应的管理平台进行质量、安全、进度等方面的管控，提升项目精细化管理水平。利用BIM技术，打破了传统方式基坑工程设计、施工及监测之间的隔阂，同时为总承包方和业主方提供相应的数据模型，使得各方高效沟通，方便后期工程建设和运维。

Abstract: In the second phase foundation pit engineering of National Convention Center, BIM technology is used in the whole process of design and construction to solve the problems of deep foundation pit, complex surrounding environment, tight construction period, multiple support forms and strict safety requirements. In the design stage, using the theory of forward design of BIM technology, combined with the characteristics of three-dimensional visualization and fully considered the deformation control requirements of surrounding buildings, structures, pipelines, subway, circular tunnel and sinking road, theunderground and above environment refined model was established and the design scheme was optimized. During the construction process, BIM technology is used to simulate the construction scheme and process. At the same time, the information of materials, machinery, safety monitoring and other aspects are integrated into the model, and the corresponding management platform is used to control the quality, safety and progress to improve the refined management level of the project. BIM technology is used to break the gap between the traditional design, construction and monitoring of foundation pit engineering, and provides the corresponding data model for the general contractor and the owner, so that all parties can communicate efficiently and facilitate subsequent project construction and operation and maintenance.