Control Points And Application In Construction Of Prestressed Concrete Cantilever Beam

The article regards the construction process of the main bridge of A Bridge as the research object,and comprehensively and thoroughly explores and analyzes the corresponding construction process and construction control technology,so that the bridge construction can be carried out smoothly and normal for the opening of the bridge.Open to the ground to lay a solid foundation.The main research conclusions of this construction control include the following three aspects:1: Deflection control plays a key role in the construction of full bridge construction.Through the comparative analysis of the theoretical data and the measured data,it can be known that the deviation between the theoretical calculation value and the actual measured value of the initial tensioning and initial casting in each stage is extremely small.The control parameter error analysis and correction method can effectively control the whole process of long-span prestressed concrete continuous box girder construction.The results of the simulation of the construction process are very accurate and reliable.2: Stress control can well reflect the actual effect of prestressing in each construction stage.The measured stress values indicate that the prestressed tension of the bridge is reliable.It can be seen from the comparison between the theoretical data value and the actual measured value that the internal stress monitoring of the bridge is still ideal,which is in compliance with the relevant design specifications,and the remaining abnormal conditions have not been found in the monitoring process.3: Absolute elevation has a very significant impact on the formation of the bridge,and it has an impact on the excessive rationality of the bridge throughout the construction process.During the entire construction process,the shrinkage of concrete is affected by many external factors.In the actual analysis of this paper,the results of data comparison between absolute elevation and design elevation indicate that it is basically in line with expectations and is a design requirement.