| The rapid development of economy has led to the rapid development of traffic.More and more bridge structures are needed.The construction is a complex process,it contains monitoring,adjustment,operation,monitoring and adjustment of the cantilever construction.During the process of continuous bridge construction,cantilever construction is a part which is very complicated and needs a long time to complete.We have to adjust the formwork elevation,concrete,tension the prestressed reinforcement.No matter where goes wrong,it will surely cause great influence to the structure safety,stability,bridge line and structural stress state.Therefore,construction monitoring is extremely important to the bridge construction.In the construction monitoring of the 60 m+100 m+60 m of Continuous Girder Bridge,the engineers made experiments to get mechanical parameters of various material,analyzed the differences between the model and actual situation of the structure and adjusted the material parameters of the model so that the model can approximate to the actual status of the structure.We develop the construction monitoring of 60 m+100 m+60 m of Continuous Girder Bridge and laid concrete sensors and the height measuring point under the program.Deflection and stress are abserved,we use the modern predictictive control theory to adjust the parameters and make structure reverse analysis,so as to provide a reasonable and proper guidance for the construction.We do a pore frition field test of F3 and F5 strands and get the actual prestressed friction losses of Bridge.The paper analyze the deflection,the bridge linear,root cross-section stress,a quarter cross-section stress and the critical section's stress after the last tension and make contrast between the real and the theoretical values.Finally,the construction linear and the structure stress fulfill the designment,the whole bridge achieve a smooth linear and reasonable structure stress. |
PDF Full Text Request