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随着我国公路等级的提高和交通流量的增加,公路立体交叉迅速发展。认真总结已建公路立交的经验教训,进一步提高公路立交的设计水平,具有重要的现实意义。 设计公路立体交叉的基本依据是相交公路的交通性质和交通流量。如果说公路立体交叉型式的选择主要决定于地形和地貌条件,那么公路立体交叉等级设计则主要取决于交通要求和投资。 相交的公路等级不一,各条道路各个方向的交通流量和交通特征千差万别,这种种
With the improvement of highway grade and the increase of traffic flow in our country, the three-dimensional highway crosses rapidly. It is of great practical significance to conscientiously sum up the experiences and lessons of the existing highway interchanges and to further improve the design level of highway interchanges. The basic basis for the design of the three-dimensional road intersection is the traffic nature and traffic flow of the intersecting roads. If we say that the choice of highway cross-roads depends mainly on topography and geomorphological conditions, the design of the highway interchange mainly depends on traffic requirements and investment. Intersection of the different levels of roads, roads in all directions of the traffic flow and traffic characteristics vary widely, this species