Construction Monitoring And Stress Error Of Amendment Of Jiuling River Specially Long Span Bridge

In the large-span prestressed concrete continuous beam bridge project, the erection Cradle cantilever construction technology is widely used , bridge structure during the construction period will have a complex internal force and deflection change. As a significant process, the monitor test and Analysis of stress and deflection has the momentous function of ensure the construction safe and the normal status of finished bridge.This paper Jiuling Bridge against the backdrop of an elevated bridge, a bridge on the structure of the characteristics of the analysis, according to the characteristics of the bridge structure of the bridge construction phase of the deflection and stress analysis for this bridge and the measured stress and stress theory of a larger difference between the issue of new stress analysis of error --- similar curve.Through a number of parameters of the sensitivity analysis, that pre-stressed, self-girder, concrete shrinkage and creep, and other parameters on pre-stressed concrete bridge in a row of the main beam deflection and stress were more affected, and the rigidity of the structure of the impact of relatively Small. During the construction process have a greater impact on the parameters should be strictly controlled, and in accordance with the parameters of the actual situation on the theoretical calculations to make the necessary adjustments. In which the temperature parameters and other parameters, as the impact of temperature change, its cantilevered structure of the deflection had a greater impact on construction should take certain measures to avoid or amended.In this paper, combined with on-site stress the real-time data monitoring and analysis of data processing and software as a bridge Dr. theoretical value to be compared against the theoretical value and actual value of the different problems of the theoretical value of the new amendment - similar curve On the theory of value added in the amendment after amendment to make the stress and a more measured approach to monitoring the bridge to reach the deflection and provide a basis for stress-controlled double.