体外横张预应力技术在混凝土旧桥加固改造中的应用探索  

Applied exploration of the external vertically tensioned prestress in the reinforcement and reconstruction of old bridge

作　　者：陈虎森 朱世峰 唐中波[3] 

机构地区：[1]重庆市交通委员会基本建设工程质量和安全监督站,重庆400060 [2]中铁大桥局武汉桥梁科学研究院,湖北武汉430034 [3]四川路桥建设股份有限公司,四川成都610034

出　　处：《四川建筑科学研究》2011年第5期86-90,共5页Sichuan Building Science

摘　　要：针对目前在役桥梁病害,在分析常规体外预应力技术优、缺点的基础上,提出了应用体外横张预应力技术对旧桥加固改造的新构思,并以调控连续刚构桥运营期中跨跨中下挠为例,进行了论证分析,对其预应力束横向张拉空间和布束方案进行了探索性研究。For the disease of existing bridge,the scheme of using vertically tensioned prestressed techniques to reinforce and reconstruct of old bridge is proposed according to the features of external prestress on the basis of analysis of its advantages and disadvantages.Take regulating the mid-span deflection of rigid frame bridge for example,the method of strand arrangement and stretching space were investigated and demonstrated.

关 键 词：体外预应力 横张预应力 张拉空间 布束方案 挠度 桥梁 

分 类 号：U445.71[建筑科学—桥梁与隧道工程] U448.23[交通运输工程—道路与铁道工程]