既有绕城高速公路新增互通立交方案比选与分析

Comparison and analysis of new interchange schemes for existing ring expressways

针对当前省会城市主要路网交通压力日益增长,城市主干道进、出城区交通压力无法有效缓解的问题。通过在既有绕城高速公路上新增互通式立体交叉来缓解省会城市主干道进、出城区交通压力逐渐成为一种趋势。该类型互通式立交,由于受到既有高速公路平纵面指标、运营安全,城市规划、占地受限等因素制约,立交的选址、选型和设计具有特殊的特点和要求。以安徽省南淝河双喇叭互通立交为例进行了阐述。

In view of the current provincial capital city main road network traffic pressure is growing,the problem of urban main road into and out of the city traffic pressure can’t effectively alleviate. It has become a trend to alleviate the traffic pressure in and out of the main roads of provincial capitals by adding interchangeable on the existing expressway around the city. This type of interchange is restricted by the existing expressway horizontal and vertical indicators,operation safety,urban planning,land occupation and other factors. The location,selection and design of interchange have special characteristics and requirements. This paper expounds the double-horn interchange at Nanfeihe river,Anhui province.