浅谈先张法预应力混凝土空心板细节设计

目前我国中小桥设计,特别是20m跨径以下的中小桥,主要采用预应力混凝土空心板,其标准跨径为10m、13m、16m、20m。因为其具有施工简便,可工厂标准化预制,且具有上下部可平行施工、施工周期短的特点,故在中小桥中广泛地采用。该文通过对现行空心板主要病害的调查,对先张法预应力混凝土空心板的细节设计提出一点建议,可供同类型桥梁设计参考。

Elementary Discussion on Design of Pretensioned Prestressed Concrete Hollow Slab

The prestressed concrete hollow slab is used mainly in the design of small and middle bridges, especially in the span below 20 m of small and middle bridge in China. The standard spans are 10 m, 13 m, 16 m and 20 m. These slabs have the characteristics of easy and convenient construction, able to be standardized to prefabricate in manufactory, upper and lower structures able to be constructed in the parallel and short construction period, therefore, are widely used in the small and middle bridges. The article puts forward some suggestions for the design of pretensioned prestressed concrete hollow slab in detail according to the investigation of the current hollow slab faults, which can be referred for the design of the similar bridges.