福建大坪湾大桥主梁线形控制方法简介

大坪湾大桥为连续刚构大桥 ,为自架设体系施工方法的桥型。自架设体系的后期结构或后层是靠已修结构来支撑 ,从而逐步完成全桥施工的。连续刚构大桥已浇筑梁段的线形不能象斜拉桥可适当调整 ,因此该类桥型的主梁线形控制尤为必要。本文将工程控制理论应用于大坪湾大桥的主梁线形控制 。

Dapingwan Bridge is a continuous rigid-framed bridge constructed by way of self-installing system. The later part or structure of the self-installing system is supported by the built structure and the whole bridge is constructed progressively. But the alignment of the finished beam sections of continuous rigid-framed bridge can not be adjusted properly, and this is different from cable stayed bridges. Therefore, main beam alignment control of such kind of bridge types is very important. This paper introduces the application of engineering control theories to main beam alignment control of Dapingwan Bridge, as well as the methods for main beam alignment control and characteristics of this bridge type.