本着“安全、舒适、环保、节约”的建设理念,徐州至明光高速公路在设计上采用低路堤的创新设计方案,为顺应低路堤的设计思路,桥梁上部采用低高度梁能显著降低路线纵坡,降低桥长,节约占地,节约工程造价,是贯彻执行低路堤设计的一项重要举措。现结合工程实例,重点介绍本项目桥梁上部采用下承式钢管—混凝土桁架组合梁,预应力混凝土连续槽型梁,低高度密肋式T梁及矮塔斜拉桥等4种低高度桥梁的设计特点及应用情况,可为低路堤桥梁设计提供参考和借鉴。 In line with the construction concept of “safety, comfort, environmental protection and economy”, Xuzhou-Mingguang Expressway adopts innovative design of low embankment. In order to comply with the design concept of low embankment, the adoption of low-height beam in the upper part of the bridge can be significantly reduced Longitudinal slope of the road, reducing the bridge length, saving land and saving construction cost are an important measure to implement the design of low embankment. Now with the project examples, the four parts of the bridge with four kinds of low-altitude bridges such as continuous concrete-filled steel tube-concrete composite girder, prestressed concrete continuous groove girder, low-height dense ribbed T- Design features and applications, which can provide reference and reference for low embankment bridge design.