关于互通式立体交叉设计中几个问题的探讨

Discussion on Some Issues in Interchange Design

总结了多年互通式立体交叉设计经验,阐述了互通式立体交叉设计中T形枢纽互通立交分岔侧主线限速的必要性及分岔侧主线单车道匝道的分流方式,对匝道小半径圆曲线处停车视距进行检验,对单车道出入口的双车道匝道适用性进行分析。

Many years＇experience in the interchange design is summarized. The necessity of speed limit formain line at the intersection of T - shape hub interchange in the interchange design and the mode of bypass flow forsingle lane ramp of main line for intersection are elaborated, the inspection on the stopping sight distance at theminor radius circular curve of ramp is performed, and the analysis on the applicability of two - lane ramp at theentrance of single lane is made.