大跨连续刚构桥悬臂浇筑施工线形控制分析

为保证大跨连续刚构桥悬臂施工过程中的线形和合龙精度,并满足成桥后的线形符合设计要求,必须对悬臂浇筑施工各阶段的线形进行有效控制。本文以安稳大桥为例,通过对收缩、徐变等影响因素分析,采用控制论中的随机最优控制理论,建立有限元分析模型,对施工各阶段立模标高进行预测,实践证明效果良好,确保了成桥线形。

To ensure the straightness and Hop Long precision in the process of cantilevered construction of continuous rigid bridge with wide spans,and meet the designed requirement to the linear of finished bridge,it is. necessary to make an effective control to the each phase of cantilevered casting construction. The essay takes the Steady Bridge as an example, having analyzed such factors as shrinking and gradually deforming,adopting the Random Optimal Control Theory of Kybernetika and establishing infinite element analysis model, to predict the three-dimensional model and standard height of each phase in constructing. Practice proves a good turn-out,and ensure the linear of a finished bridge.