高墩大跨PC连续刚构桥跨中下挠控制对策研究

Research on Control Measures of Midspan Deflection of High Pier Long-span PC Continuous Rigid Frame Bridge

大跨径PC连续刚构桥存在的主要病害是主跨跨中长期下挠和箱梁梁体开裂,这些病害不但对高速行车的舒适度造成影响,甚至威胁桥梁的正常使用。本文在研究国内外防治方法的基础上,从设计、施工监控、施工质量和运营管理等方面综合考虑,总结了高墩大跨PC连续刚构桥跨中长期下挠控制对策,为同类桥型挠度控制提供借鉴。

The cross-long main span deflection and the cracking of box girder beams body are the main diseases in long-span PC continuous rigid frame bridge.These diseases not only influence comfort of high-speed driving,even imperil normal use of bridge.This article,taking design,construction monitoring,construction quality and operation management into account,summarized the control measures of midspan deflection of high pier long-span PC continuous rigid frame bridge on the basis of dispensarization at home and abroad so as to provide reference for similar bridge deflection control.