Research On Visualization Of Complex Foundation Pit Monitoring Based On BIM Technology

With the acceleration of urbanization,the demand for super high-rise buildings and underground large volume projects is increasing,and the number of foundation pit projects is growing rapidly.In the densely populated urban areas,the reliability of foundation pit engineering is related to the safety of surrounding buildings(structures).BIM technology has been widely used in engineering field in recent years,and BIM technology can improve the efficiency of information transfer and sharing.efficiency,and through BIM three-dimensional visualization technology,the foundation pit engineering monitoring data can be combined with the BIM model of foundation pit engineering to reflect the foundation pit deformation more intuitively.Based on the limitations of the existing pit monitoring results presentation method and the advantages of BIM technology,this thesis conducts a systematic study on the pit monitoring visualization realization method,firstly,constructing the BIM parametric model of pit engineering by using BIM technology,then carrying out the secondary development of monitoring data visualization plug-in based on Revit software,and finally combining BIM technology with deep foundation pit engineering monitoring data to realize the pit engineering The visualization function of monitoring data.The main research contents and results of this thesis are as follows:(1)Constructing parametric BIM model of foundation pit engineering based on BIM technology.Based on BIM technology,the characteristics of the families in Revit are studied,and various parametric family components such as piles,supports,crown beams and underground diaphragm walls of foundation pit engineering are created,and a parametric family library of foundation pit components is established which can be called by users at any time.Based on Revit modeling technology,the parametric BIM model of foundation pit project is created by using the functions of parametric member family and system family,which is convenient for the extraction of family information by foundation pit monitoring plug-in.(2)Secondary development of pit monitoring visualization plug-ins based on Revit software.Through the study of Revit secondary development tools,design ideas and environment construction,we apply Visual Studio 2019 and C# language to Revit secondary development to create foundation pit engineering monitoring plug-ins to realize rapid setting of monitoring points in the foundation pit BIM model,rapid import of foundation pit monitoring data in the BIM model,display of foundation pit monitoring table data and curves in the model interface,and functions such as foundation pit engineering monitoring warning.and early warning of foundation pit engineering monitoring.(3)Based on the actual foundation pit project,the application of BIM technology-based foundation pit monitoring visualization research results is demonstrated.Firstly,the BIM model of foundation pit under different working conditions is created according to the construction drawing of the support structure of the actual project,and then the monitoring plug-in developed for foundation pit project is used to quickly arrange the monitoring points of vertical and horizontal displacement of the support structure,the monitoring points of supporting axial force,the monitoring points of surrounding surface settlement and building(structure)deformation,and import the monitoring data into the model,and finally,various monitoring data are presented on the interface of the foundation pit BIM model according to the demand.and data warning,realizing the visualization of foundation pit monitoring.