体外预应力加固T形刚构桥

T-Frame Bridge Consolidated by Prestressed Reinforcement Installed Outside Concrete Body

体外预应力技术施工方便、经济可靠 ,能有效地提高现有桥梁承载能力、改善结构性能 ,因而在加固既有桥梁中广为应用。该文以紫坭大桥主跨T形双悬臂刚构成功应用体外预应力加固的实例为背景 ,说明利用体外预应力加固同类结构的设计、施工及其监控方法 ,并从设计思路出发 ,强调施工监控的重要性。

The prestressed technology outside concrete body is easy for construction and reliable in economy, it can effectively enhance the bearing capacity of the existing bridge and improve the structural performance, so it is widely used in consolidating the existing bridges. Taking the example of successful application of Zini Bridge with a main span of T type double cantilever Frame consolidated by prestressed reinforcement outside concrete body as the background, the paper illustrates the design, construction and monitoring method of the same kind of structures consolidated by prestressed reinforcement outside concrete body, it also stresses the importance of monitoring in construction from the design thinking.