Research On Construction Monitoring Of Short Line Prefabricated Continuous Rigid Frame Bridge Based On BIM

The prestressed concrete continuous rigid frame bridge has become one of the main bridge types in the field of bridges.Among the many bridge construction methods,the short-line segment prefabricated assembly method has begun to gain the favor of engineers with its unique advantages.It belongs to the category of cantilever assembly.Accurate control and monitoring of the construction process is a key link to improve efficiency,ensure quality and control costs.After the introduction of BIM in China,it has achieved excellent development in the fields of construction and structure.In recent years,BIM-based bridge construction control is a popular technology applied by BIM in the field of bridges.This article relies on the actual engineering of the main bridge of No.1 bridge in Yueqing Bay.Based on the detailed analysis of the BIM and short-line method cantilever construction control theory,the construction control technology and application of the continuous rigid frame bridge based on BIM are studied.First,according to the erection conditions and construction methods,the main beam of the main bridge of Yueqing Bay No.1 was divided into sections,and the main family library of bridge components was established using BIM core modeling software Revit,including main beams of different cross-sectional shapes and sizes.The beam family,pile foundation,bearing platform,bridge pier and other component families are spliced according to the elevation position and spatial relationship between the components,and the BIM model of the main bridge of Yueqing Bay No.1 Bridge is established and the parameterized models are related to each other.Then,the Midas link for revit structure plug-in was introduced.According to the actual operation method of the plug-in,the BIM model and the finite element model were initially converted.With the help of the finite element anal ysis software Midas Civil,the refined model was revised to obtain Yueqing Bay.The finite element model of the main bridge of No.1 bridge.Through the operation analysis,the mechanical simulation analysis in the construction stage was realized.The stress an d cumulative displacement of the main beam in different construction stages and the theoretical elevation value in the precast stage were calculated.The elevation of the mid-span section was compared with the actual monitoring value.The results showed that the accuracy was good.Next,using the Navisworks plug-in in the external tool of the same version of Revit,save the BIM model as a nwc format file,and then import the cross-platform model fusion in Navisworks Manager.Combined with the Clash Detective func tion,the prestressed pipelines,the prestressed pipelines and the ordinary reinforcement are described The process and operation method of collision check.By importing the main bridge Project construction plan,the main construction procedures and time nodes are added,and then the Timeliner function is used to perform dynamic simulation analysis of the full bridge construction,and the visual expression of construction monitoring is realized.Finally,the detailed monitoring scheme for the short-line cantilever assembly construction of the main bridge of Yueqing Bay No.1 bridge is given.The construction monitoring content is the linear control of the prefabrication and assembly stage,and the monitoring of stress,temperature and settlement.In order to realize th e construction monitoring data management,the main beam of the continuous rigid frame bridge and the corresponding measuring points are coded and processed according to certain rules.By establishing the sub-models of the measuring points of each member,the construction monitoring data is input into the BIM model to complete the storage and integration of monitoring information.At the same time,with the help of Python programming language,the information display of the construction monitoring and early warni ng system was realized,and the correctness of the algorithm was verified,which laid the foundation for the unified reading and analysis of information.This article explores the interactive processing of model information between BIM series software and finite element software to increase the total amount of information in the BIM model.Compared with the traditional construction monitoring model,it saves costs and provides options for selection,optimization and improvement.With strong support,the guiding significance and application value are more significant.