部分互通立交节点改造案例分析

Analysis on Node Reconstruction of Partial Interchange

立体交叉在城市交通系统中起着举足轻重的作用,是城市道路网络的关键节点。匝道作为立体交叉不可缺少的组成部分,其设计合理与否,直接关系到立交功能的发挥、行车的安全畅通、营运的经济和工程的投资等。北京经济技术开发区现状太和东桥为一双苜蓿叶式的部分互通立交,以对该立交增设转向匝道实现节点的全互通为例,通过对现况条件的梳理、对规划方案的解读、对项目功能的理解以及对设计方案的推敲,直至最终确定设计方案,将该立交增设两条左转转向匝道的设计方案分别进行分析比较、归纳总结,以为相关类似工程提供经验和参考。

Interchange plays an important role in urban traffic system,and it is the key node of urban road network.An indispensable part of interchange,whether the design of ramp is reasonable or not is directly related to the function of interchange,the safety and smoothness of driving,the economics of operation and the investment of engineering.Taihe East Bridge in Beijing Economic and Technological Development Zone is a double cloverleaf interchange.Taking this interchange adding the turning ramps for realizing the full interchange of nodes as an example,through the combing of the current conditions,interpretation of the planning scheme,understanding of the project function and consideration of the design scheme,the final design scheme is determined.The design schemes of this interchange to add two left-turn ramps are analyzed,compared and summarized,which provide the experience and reference for the similar projects.