城市高架道路的中日设计规范比较

Comparison of Design Codes for Urban Viaducts between China and Japan

在深入推进新型城镇化,中心城市和城市群正成为承载发展要素主要空间形态的背景下,解决城市交通拥堵问题更加具有时代紧迫性。城市高架桥具有便于形成网络化布局和与既有城市道路紧密融合的优点,但有一些有别于公路桥梁的特点。通过对中日两国在城市高架桥梁方面的设计规范进行比较,找出日本在建设城市高架桥梁方面所采用的一些方法。对提出根据设计速度决定桥梁最大纵坡、采用面分布车道荷载、根据作用种类采用不同抗倾覆安全系数、强化铺装层内排水提高耐久性等问题进行探讨。

Under the background of further promoting the new urbanization,the central cities and urban agglomerations are becoming the main spatial forms of bearing development elements,and it is more urgent to solve the problem of urban traffic congestion.Urban viaduct has the advantages of easy to form the network layout and closely integrate with the existing urban roads,but has some characteristics different from highway bridges.By comparing the design codes for urban viaducts between China and Japan,some methods adopted by Japan in the construction of urban viaduct are found out.Some ideas such as the determination of the maximum longitudinal slope of the bridge according to the design speed,the distribution of lane load on the surface,the adoption of the different anti-overturning safety factors according to the type of action,and the strengthening of drainage in pavement layer to improve durability are put forward.