Research On Construction Simulation And Monitoring Technology Of Nianpangou Bridge(60+110+60)

Long-span prestressed concrete continuous rigid frame bridges are usually constructed by cantilever construction.However,due to the large number of main beam stages and complicated construction steps,it is impossible to make reasonable adjustments after closing into bridges.Therefore,monitoring during construction is essential..In this paper,the Rpanpan Bridge(60+110+60)m is taken as the research object.By arranging the elevation monitoring point and the section embedded strain sensor,the various working conditions of the bridge construction stage can be detected and controlled,and the bridge can be smoothly closed.Reasonable force and the purpose of ensuring construction quality.The main research contents and means are:(1)By consulting relevant literature and books,it is determined that the monitoring of the Ranpangou Bridge adopts the method of adaptive and closed-loop feedback to implement on-site monitoring.According to the comparison between the field test data and the model calculation data,the monitoring method is reasonable and effective.(2)According to the construction design drawings of the Dianpangou Bridge and the on-site construction situation,the finite element simulation model was established by Dr.Bridge to extract the cumulative displacement value of the bridge over 10 years and the calculated value of the section 0# block stress in each construction stage as the theoretical data of the detection control..Through the comparison between the measured values of deflection and stress and the calculated values,the concrete placement and prestressed tension during the construction phase are normal.(3)Establishing the Midas civil structure model and comparing the 10-year creep value of the bridge with the stress calculation value of each construction stage,it is found that the two softwares can mutually prove the model simulation.