大跨度连续刚构桥施工预拱度控制研究

Research on Long-span Continuous Rigid Frame Bridge Construction Control of Pre-camber

大跨度连续刚构桥目前主要采用悬臂施工,为保证大桥的合拢精度以及大桥成桥后的线形符合设计要求,必须对大桥在施工各阶段的线形进行有效控制。该文以浑水河大桥为工程背景,介绍了预应力混凝土连续刚构桥的线形控制原理和方法,通过对浑水河大桥施工控制的验证,论证了预拱度控制对高矮墩大跨度连续刚构桥成桥线形控制的重要性,最后对此类大桥的线形施工控制理论与方法提出了一些建议。

Nowadays,we mainly use the method of the cantilever beam in the long - span continuons rigid frame construction, in the process of that, we must take actions to control the linear effectively in order to meet the accuracy and the linear requirements before the bridges completed. This text based on the Hun shuihe Bridge introduces the linear control theory and method of the prestressed concrete continuous rigid frame bridge and proves the importance of the linear control to the building of the Pier height of long - span continuous rigid frame bridge. Besides that, it takes some suggestions to the the linear control theory and method to this type of bridge.