一、工程概况: 蓟门桥位于北三环路与学院路交汇处,北三环路沿东西方向跨越学院路居上。学院路东、西侧路沿南北方向在桥下分置于土城和小月河的东、西两侧。使本工程分为东、西两座桥。整个立交呈不对称苜蓿叶式,上下道路由菱形匝道互通。与周围的8个人行通道和一条小月河相映,称之为“两桥八洞 First, the project overview: Jimen Bridge is located in the North Third Ring Road and College Road Interchange, North Third Ring Road along the Institute Road, east and west Habitat. College Road East, west side along the north-south direction in the bridge sub-Tucheng and Satsuki River on the east and west sides. The project is divided into east and west two bridges. The entire interchange was asymmetric alfalfa leaves, up and down the road by diamond ramp interoperability. With the surrounding 8 personal pavement and a small river counterparts, called "two bridges eight holes