剪刀叉式接地匝道在城市高架道路中的应用

On Cut Knife & Fork-typed Grounding Ramp Applied in Urban Viaduct Road

传统城市高架道路接地匝道往往存在交织段较短、交通负荷较重、交叉口拥堵情况严重等问题。针对这些问题,提出了一种剪刀叉式接地匝道设计方案,即在单侧高架道路上先布置下匝道,再布置上匝道,在立面上,先下后上的2根匝道形成"剪刀叉"的形态,在平面上2根匝道并列布置,其中1根匝道布置在道路内侧,另1根匝道布置在道路外侧。高架道路的另一侧也按此方法布置匝道,避免高架道路车流的短距离交织运行,同时也使地面交叉口最多只面对2根匝道,减轻了地面交叉口的交通负荷,改善了运行情况及服务水平。

There are many problems appeared in traditional urban viaduct road grounding ramp,such as shorter weaving section,heavier traffic load and intersection congestion,etc.Aiming at these problems,a design plan of cut knife & fork-typed grounding ramp is proposed,that is,off-ramp is set up firstly on the one-sided viaduct road,on-ramp secondly.The two ramps will form the type of cut knife & fork in the facade and be parallel in the plane,one ramp inside and the other one outside of the road.Meanwhile,the other side of the viaduct also uses this ramp layout to avoid short distance weaving running of traffic flow,to make ground intersections meet two ramps in the maximum,to relieve the traffic load of ground intersections and to improve the running condition and service level.