新型螺旋式T形互通立交设计探讨

在某些跨越重要航道的公路建设中，有时会遇到互通式立交2条衔接道路高差较大的情况。结合广东省虎门二桥工程海鸥岛互通立交的初步设计，提出了一种新型螺旋式 T形互通立交设计的应用研究，分析了具体的设计方法和技术要求。该种新型螺旋式T形互通立交具有克服大高差、增长匝道展线、减缓匝道纵坡、节省用地的优点。

Discussion on New Kind of T-shaped Interchange Design

There is large elevation difference between two interchange roads in same ports bridges con-struction.Taking the Haioudao interchange project in the second Humen Bridge for example,a new kind of T-shaped interchange and several design techniques about this new T-shaped interchange are introduced in this paper.This new kind of T-shaped interchange has many advantages such as dealing with the lager elevation difference,increasing the ramp length,reducing the longitudinal,saving land and so on.