多跨连续梁桥临时固结及挠度影响研究

Research on Temporary Fixation and Deflection Influence of Multi-span Continuous Beam Bridge

分析了多跨连续梁桥的临时固结竖向和水平弹性支承刚度、转动弹性支承刚度,以南水北调丹江口施工大桥工程为例,对临时固结的连续梁桥在∏构合拢过程中各种工况的挠度,进行模拟计算,并与实测值进行比较分析,提出了不同临时固结工况对连续梁挠度影响规律。

The vertical,horizontal,and rotational elastic support stiffness are analyzed.Based on the construction of Dan-jiang-kou Bridge for South-to-north Water Transfer Project,the deflections are calculated in structural transferring stage of Π type under the influences of temporary fixation.The calculated values are compared and analyzed with those collected in the construction.The influence pattern of temporary fixation in different construction stages is put forward.The results are useful to the deflection control in construction of multispan continuous beam bridges in this paper.