城市高架立交桥梁上部结构类型研究

Study on Superstructure Type of Urban Viaduct

随着经济和社会的发展,城市高架立交桥梁结构形式也趋于多样。结合郑州市南三环东延线工程,对预应力钢筋混凝土连续梁、现浇波形钢腹板连续梁、预制波形钢腹板连续梁、预制小箱梁等结构形式进行造价、施工工艺、后期养护等方面进行比较,确定主线采用预制小箱梁为主的结构形式,在跨路口等需要大跨桥梁的节点采用现浇波形钢腹板连续梁桥,为城市高架立交桥梁上部结构类型的选用提供了有益的参考。

With the development of economy and society, the structural form of urban viaduct also tends to be diversified. Based on Zhengzhou South Ring III East Extension Project, this paper compares the construction costs, construction technologies and later maintenances of pre-stressed reinforced concrete continuous beam,cast-in-situ corrugated steel web continuous beam, prefabricated corrugated steel web continuous beam and prefabricated small-box beam. The prefabricated small-box beam as the main structural type is determined to use for the main line. The cast-in-situ corrugated steel web continuous beam bridge is used at the node of long-span bridge required to spam the intersection, which can be referred for the selection of superstructure type of urban viaduct.