Deep foundation pit monitoring system based on BIM

The invention relates to a BIM-based foundation pit monitoring analysis system, and belongs to the technical field of foundation pit engineering monitoring. The foundation pit monitoring and analysis system comprises a BIM visualization module, a data acquisition module, a data analysis module, a risk assessment module and a monitoring and early warning module. Wherein the data analysis module adopts special abnormal value processing and classification calculation, abnormal value elimination is firstly carried out on data, collected by the data collection module, of the deep foundation pit, then the eliminated data is reprocessed through five standard membership degree formulas, and an evaluation matrix # imgabs0 # is collected and formed; and multiplying the evaluation matrix # imgabs1 # by the comprehensive weight W to obtain a final evaluation sequence B, evaluating the deformation condition of the monitoring points by using the maximum value in the final evaluation sequence B, and dividing the foundation