一类常见复杂地形条件下的立交新形式

城市近郊铁路与公路并行是一种极其常见的现象,而随着城市规模的不断扩大和交通需求的不断增长,这些公路逐渐纳为城市的主要干道,并且与相交道路的转换交通量大增,交叉大都为不完全互通立体交叉,因通行能力不足而形成交通瓶颈.由于受铁路及用地的限制,这些与铁路平行的道路如何与其他相交干道的互通立交衔接变成十分突出的问题.而牵牛花型全互通立交新形式,既可以最大限度地利用现有的道路资源,又可以避免上跨铁路引起桥面标高过高而造成道路坡度过陡或斜坡过长、增加用地规模及工程造价的问题.

A New Type of Cloverleaf Junction in the Condition of Complicated Terrain

City outskirts railway and highroad going side-by-side is a common phenomenon. With the continuous city expanding and traffic demand increasing, those roads will be city main trunk roads, and traffic flow increased greatly with intersectant roads. Most of intersects are incomplete, will be bottle-neck for low traffic capacity. How to solve the connection between the road paralleled with railway and other trunk road becomes more important. Morning glory-type intersections can not only utilize road resource to a large extant, but also avoid leading too steep grade or too long slope, so it can save ground resource and reduce project cost.