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双层高架桥梁是城市立交中常见的桥梁形式之一,如何成功地将其应用到山区高速公路中,是一个值得研究的问题。通过介绍甘肃南部山区高速公路洛塘河双层高架桥梁的设计,分析探讨了山区高速公路双层高架桥梁的结构体系、上下部构造形式,以及双层高架桥梁有别于常规桥梁的特殊之处,就荷载组合、抗震设计、施工顺序、运营安全等问题进行了探讨。
Double-decked viaduct is one of the common bridge forms in the city interchange. How to successfully apply it to the mountainous expressway is a problem worthy of study. This paper introduces the design of double-height viaduct of Luotanghe expressway in southern Gansu Expressway, analyzes and discusses the structural system of the double-decker elevated viaduct in the mountainous expressway, the structure of the upper and lower parts, and the peculiarity of the double-decker elevated viaduct , On load combinations, seismic design, construction sequence, operational safety and other issues were discussed.