Research On Incremental Launching Control Of Cable-stayed Bridge Based On BIM Technogy

With the development of economy,China’s comprehensive national strength has rapidly improved,and the bridge engineering has achieved remarkable achievements.The building structure has gradually developed towards informatization and industrialization.The development and research on BIM technology are popular now,but it is seldom applied in the field of bridge engineering.The study of BIM technology has just begun and has not yet formed a complete system.The construction process of cable-stayed bridges incremental launching is complicated and the monitoring information is numerous.The integrated management of monitoring information for incremental launching and the three-dimensional visualization of incremental launching are the problems to be solved imperatively.In this paper,based on the requirements of engineering steering informatization and monitoring and management of cable-stayed bridge incremental launching,I study the construction monitoring of cable-stayed bridges incremental launching based on BIM technology.The main contents of the research are as follows:(1)In order to complete the construction of the BIM model,I analyze and contrast the BIM standard,the engineering structure decomposition standard and the BIM modeling software,and select the standards and software platform that are suitable for this paper.I work on the BIM modeling standards,study and extend the coding standards.The prototype model database of cable-stayed bridges was established and the BIM model of cable-stayed bridges was completed by assembling them.(2)According to the characteristics of the construction monitoring of cable-stayed bridges incremental launching,the overall framework of the construction monitoring system of the cable-stayed bridges incremental launching is constructed,and by the secondary development of the Micro Station platform forms an interactive tool for monitoring point information and monitoring data.After finishing adding non-geometric information to the monitoring points in the BIM model,you can edit the attribute information of the query monitoring points.At the same time,you can enter and query the monitoring data of the monitoring points.(3)Optimize the structure of the Heilongjiang Bridge from the optimization of the guide beam and the optimization of the temporary pier,Analyze and compare the design parameters of the guide beam to obtain the optimal design data.Then use the finite element analysis software Midas/civil set up simulate pre-optimization and post-optimization guideway schemes.The internal force of the two girders was program compared and it was concluded that the internal force of the girder was greatly improved after the guide girder was optimized;At the time of optimizing the temporary pier,Midas software was used to simulate the pre-optimization and post-optimization projects of the two types of temporary pier,and the internal forces and deformations of the girders during the incremental launching were compared,and the internal forces of the girders were greatly reduced after optimization of the temporary piers.Determine the optimal construction plan and compile the construction monitoring plan according to the construction plan,and finally apply the BIM technology to the monitoring of jacking construction of Heilongjiang Bridge.