镇沅互通式立交与服务区合建方案设计

Scheme Design for the Joint Construction of Zhenyuan Interchange and Service Area

近年来,高速公路主体骨架路网已基本形成。对于起到连接主体骨架路网的高速公路,受地形、地质条件影响,桥隧占比往往较高,从而造成互通式立交及服务设施的选址越来越困难,方案设计的难度也越来越大。论述了墨江至临沧高速公路镇沅互通式立交与镇沅服务区合建的必要性,通过转向交通量分析,确定了互通区匝道技术指标的选用。在此基础上提出了镇沅互通式立交与服务区合建的设计思路,并提出了3个合建设计方案。经过对比分析和论证,确定变异A型单喇叭互通式立交+双侧对称布设服务区场区的方案一为推荐方案。

Over the years, the main skeleton road network of the expressway has basically been formed. For the expressway that connects the main skeleton road network, the bridge-tunnel ratio is often high due to the influence of terrain and geological conditions,which results in the location selection of interchanges and service facilities more difficult,and the difficulty is increasing for the scheme design.In the paper,the necessity of joint constructing the Zhenyuan Interchange and Zhenyuan service area on Mojiang-Lincang expressway is discussed.Through the analysis of steering traffic volume,the selection of technical indicators of the interchange area is determined.On this basis,The design idea of the joint construction of the Zhenyuan Interchange and the service area is put forward,and three joint construction design schemes are proposed.After comparative analysis and demonstration,it is determined that the variant A type single-trumpet interchange type +bilateral symmetrical layout of the service area is recommended.