Research On BIM Deepening Design And WebGL Visualization Of Foundation Pit Engineering

With the continuous development of urbanization,the utilization rate of underground space is increasing,and the foundation pit engineering is becoming increasingly complex.As a digital tool,BIM technology that can integrate the life cycle information of the project into a three-dimensional model has been widely recognized to improve the overall efficiency of construction projects.At the same time,the application support of visualization interactive platform based on Web GL technology in BIM is also on the rise.At present,BIM technology is mainly applied to ground buildings,but its application in underground engineering modeling and optimization management is not perfect.In order to further improve the design and construction efficiency of foundation pit engineering,Dynamo secondary development based on Autodesk Revit platform was used to deepen the design of parametric model of foundation pit engineering.At the same time,Web GL technology was used to develop the visual interactive platform of foundation pit.The main research contents and results are as follows:(1)Auto CAD was used for secondary processing of foundation pit horizontal construction drawings,and the data of plane and section drawings were integrated.Through the secondary development of Dynamo,the geological exploration data were extracted,and the deepening design of three-dimensional geological model was carried out.The rapid creation of three-dimensional geological model and the browsing and information reading of arbitrary sections were realized.(2)The parametric family of the main supporting components of foundation pit engineering was established,such as reinforced concrete bored piles,crown beams,bolts and so on,which make a supplement the Revit ’ s own foundation pit component family library.The Dynamo program was used to carry out batch layout of foundation pit support components on three-dimensional geological model,and the driving modeling of foundation pit support structure on geological model was realized.(3)The steel bar collision problem of typical complex joints between foundation pit support components was studied.The steel bar collision problem in foundation pit support structure was solved by adjusting the shape and position parameters of steel bars.The accuracy of foundation pit model was improved,and the deepening design of foundation pit overall structure was realized(4)The lightweight processing of building information model was realized by using C #language for data format conversion.At the same time,the visualization interactive platform was developed by using Web GL technology to realize the visualization of foundation pit model,and the interaction and callback of some model data information were realized by calling the model parameters.