大型地下互通式立交型式选择和路线标准研究

Study on Type Selection and Route Standard of Large Underground Interchange

文章通过对地下和地面立交对比分析,给出了三路和四路地下立体交叉的几种立交型式建议;并从造价和行车安全的角度,给出了地下立交分岔隧道的部分路线标准确定方法。在地下隧道立交的选型中,应尽量选取少交叉口、少叠交层次和行车视距较好的型式。在路线标准的选择中,尤其要注意满足运营速度下的停车视距,以保障行车安全。在考虑安全因素的同时,经济性和工程造价也是决定隧道型式和路线标准的重要因素。

Based on the comparative analysis of underground and surface interchanges,the paper provides several proposals for constructing three-way and four-way underground interchanges and taking into account cost and traffic safety,offers some methods about route design of underground interchanges.While selecting types of underground tunnel interchanges,it is recommended to choose the type with few intersections,overlapping layers and good sight distance which is especially important for traffic safety.Apart from safety,economy and construction cost are also indispensable for determining tunnel types and route standards.