Research on Whole Process Performance Monitoring of Large-span Curved Steel Box Girder Overcrossing Double-track Railway Construction
Aiming at the problem of high safety risk in the construction of curved steel box girder overcrossing double-track railway,based on Nanjing-Ma'anshan Expressway reconstruction and expansion railway related engineering,the finite element model of steel box girder dragging construction is established based on Midas Civil.The bridge structure during the construction process is simulated and analyzed,and the alignment and guide beam stress changes of the steel box girder during the dragging process are monitored in real time.The stress change trend of the guide beam and the deformation law of the steel box girder during the dragging process are studied.The results show that the change trend of monitoring data and numerical simulation data is consistent,and the comparative analysis of the two methods can effectively reflect the stress state of the structure.The unfavorable state of the steel box girder during the dragging construction process is the maximum cantilever state before the guide beam reaching the pier and the reaching pier stage.Ensuring the reasonable construction state before the guide beam reaching pier is the key to successfully completing the dragging construction of the steel box girder.
NETL
NSTL
万方数据
维普
