高墩大跨PC连续刚构桥跨中下挠控制对策研究

摘要

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,这些病害不但时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.