Study On The Construction Monitoring Of The Cantilever Method In The Jialing River In Lang Zhong

In recent years,prestressed concrete continuous rigid frame bridge has been widely used in railway,highway and municipal bridge engineering because of its overall performance,good seismic performance,continuous deck appearance,beautiful appearance and convenient maintenance.Has become one of several commonly used bridge bridge.The cantilever construction of the continuous rigid frame bridge undergoes a long and complicated construction process and the structural system conversion process.During the period,the actual measurement value of the structure is often deviated from the theoretical design value.Therefore,in the construction process of the bridge must be the actual shape of the bridge and the implementation of the whole process of stress monitoring and construction of the state of continuous and timely and effective adjustment.This paper mainly studies the construction monitoring theory of continuous rigid frame bridge.Firstly,the tasks and objectives of bridge construction monitoring are introduced in detail,and the various systems and guarantee work of monitoring the monitoring theory are summarized.The corresponding theoretical research on the construction monitoring of continuous rigid frame bridge is completed,and the monitoring target is clarified.Monitoring focus.Then,based on the theoretical calculation of the linear control theory of continuous rigid frame bridge,the model of the space bar system is established by using the finite element software Midas / Civil,and the theory of linear control is established based on the actual engineering case of Jialingjiang Third Bridge in Langzhong City.,The completion of the main beam of the construction section of the modulus of the theoretical value of the calculation and other data for the follow-up to provide the basis for the protection of data.Then,when the model of continuous rigid frame bridge construction is adjusted and adjusted,the gray system prediction theory is introduced.Based on the theory and measured data,the gray system theory is used to establish the gray model GM(1,1),to predict the elevation of the next beam segment to guide the site construction monitoring.Finally,the stress monitoring method of continuous rigid frame bridge is studied.Based on the analysis of the finite element software,the finite element software is used to analyze the stress index of the critical stress index,which is suitable for different temperature The top of the situation to monitor the value of the bridge to ensure the success of the bridge.