芜湖长江大桥主桥施工过程的内力监测与分析

Stress monitoring and analysis for construction of the bridge spanning on Yangtze River in Wuhu City

芜湖长江大桥是本世纪我国在长江下游建造的一座投资和主桥跨度均为亚洲最大的公路与铁路两用桥．该桥的铁路桥部分全长１０多ｋｍ，公路桥部分全长超过６ｋｍ，尤其是跨越长江主航道的主桥，形式上采用的是钢桁架与斜拉索相结合的结构，主跨达到３１２ ｍ．但由于受到航空和长江航运。以及地面现存铁路设施接轨的限制．塔墩与主跨的设计比值仅为０．１１，这样的几何参数在全世界同类桥梁中也是绝无仅有的．不仅如此，为了确保主桥在建设过程当中和建成后使用期间的安全，主桥在设计和架设中还采用了多项新技术和新材料．然而这一切都首先需要在施工过程当中进行检验，因此，芜湖长江大桥斜拉主桥施工过程中的内力监测工作就越发显得重要．本文详细介绍了该桥主要控制结构的内力监测方法和监测结果，并进行了适当的分析，以供同行在进行桥梁或其他重大工程项目的内力监测时参考。

The bridge spanning on Yangtze River in Wuhu City and combining with highway and railway is the largest one in investment and spanning of key part of bridge in Asia whic was built by China in 20th century. The key part of the bridge over the main channel of Yangtze River is designed in the shape of steel truss with cable staying and consisted by three spans, the longest span reaches 312m. To insure success on construction of bridge, many new techniques and materials were adopted, so it was necessary to apply internal stress measurement to the constructing process. In the paper, the main results of measurement are shown with brief analyzsis.