Separated Interchange Swivel Bridge Over Yanshi Railway Research On Construction Monitor Technology

This paper takes the Xintai-Taierzhuang highway cross-Yanshi railway split interchange main bridge project as the background,takes the actual measurement data of the construction site and the specific problems found in the construction as the starting point,and focuses on the monitoring method of concrete axis rotating body construction of T-shaped rigid girder bridge.According to MADIS and other software simulation,the changes of mechanical properties of the main beam and its ancillary structures in the process of pouring,turning and after the completion of the rotation are obtained,which provides the preliminary theoretical data and the division basis of the construction stage for the on-site construction,and guides the on-site construction according to the co MParison of the actual data and theoretical data obtained by on-site monitoring.the main research content of this article is as follows:(1)The construction sequence of the T-shaped rigid girder bridge,the installation method of the rotating device and the installation process of the protection facility before the bridge is completed.(2)The single girder method is used to establish the whole bridge model,and the Midas software is used to calculate the relevant stress,deflection and bending moment of the main girder in the state of prestressed concrete structure pouring,turning construction,and turning body closing into a bridge.(3)In the process of rotating construction,the linear shape of the main beam,the cross-sectional stress of each construction stage,and the stress of the key section of the main pier are monitored throughout the process;According to the actual situation of the site,the errors in the process of linear shape and stress monitoring are analyzed,and the monitoring results are corrected in time.(4)In the process of test rotation of the main beam and formal rotation,the overall control system is adopted,and the pace of rotation and monitoring is always consistent;Through the analysis of key data in the process of weighing test and subsequent counterweight,test rotation and formal rotation and attitude adjustment after turning,the bridge can be smoothly turned and closed.The construction of the rotary bridge adopts the construct of concrete shaft rotation,and the turning process is simple and easy to run.The weight of the rotor is all tolerated by the bearing of the bridge pier spherical concrete.The carrying capacity is large.The position is not used in the lifting equipment and the full stand,and the construction rotation process is safe,balanced,and reliable.The overall construction transition process has certain innovation and research..