某人行桥体外预应力加固技术

由于种种原因,许多桥梁主跨出现过宽裂缝、挠度过大等病害,严重影响其使用性能。文中介绍佛山大沥镇某人行桥主跨梁通过施加体外预应力来解决主梁挠度过大的问题,并探讨该技术应用于桥梁加固设计、施工、监控等环节的关键技术。

Technology of External Prestressing in a Pedestrian Bridge Strenthening

For some reasons,it occurs some problems to many bridges such as excessive cracking,deflation,etc.,which seriously influence the using performance of bridges.In this paper,taking the main beam of a pedestrian bridge in Dali Town of Foshan City for instance,the problem of excessive deflation is solved through adding external prestressing.And we’ll discuss the key technology of every tache such as design,construction and monitoring of external prestressing in bridge strengthening.