The application of foundation pit 5D monitoring and 3D geological model technology based on BIM increased the work efficiency and reduced the man-made omission effectively of safety monitoring during the process of foundation pit construction depending on the visual method. At the same time, in this project, the application of new demonstrating technologies and mobile media equipment such as 3D GIS, 3D laser scanning, 3D printing, AR, VR, Google Glass and so on made the safety monitoring during the process of foundation pit construction operated by project managers, supervisors, monitors more effective. The extended application of BIM technology on the foundation pit safety monitoring of the Poly Plaza explored a new method about foundation pit safety monitoring, and it also provided a useful reference on the application of BIM technology during the whole process of construction of foundation pit engineering.

With the development and utilization of urban underground space, the capacity and efficiency oftraditional foundation pit monitoring method is difficult to meet the needs of future development.Many domestic design enterprisesare exploring new methods to seek for breakthrough.In this paper, the author proposes a new method and practice with a Project in Shanghai.This paper proposes a multi-dimensionalvisualizationmonitoring technology of the foundation pit, and the research and exploration are conducted through practice.