复合式立交集散车道新型布设方案研究

Study on Innovative Layout Schemes for Composite Interchange Traffic Distribution Lanes

以沪昆高速梨园(赣浙界)至东乡段改扩建工程中的鹰潭东复合式互通式立体交叉改扩建项目为研究对象,从互通现状、交通量预测及通行能力分析,确定三个比选方案,通过对三个设计方案优缺点及各指标具体数据的比较,提出一种改进优化集散车道的较新颖的复合式互通接线方案,即将集散车道F从主线处分流改为顺接B匝道从E匝道处分流。结果表明:对集散车道优化后的方案二,与传统设计方案相比,不论从占地面积还是工程造价方面均具有较大的优势;但存在交织段,分流处不易识别,需增设交安设施以确保驾驶者提前驶入正确的车道。推荐方案适用范围广泛,但大交通量情况下的复合式互通式立交需慎重选用。

This study examines the expansion project of the Yingtan East Composite Interchange on the Liyuan(Jiangxi-Zhejiang border)to Dongxiang section of the Shanghai-Kunming Expressway.From an analysis of the current interchange configuration,traffic volume prediction,and traffic capacity,three comparative schemes are proposed.By assessing the strengths and weaknesses of these designs,along with detailed indicator data,a novel composite interchange connection scheme is proposed to improve and optimize the distribution lane.This involves rerouting distribution lane F from the mainline to connect seamlessly with B ramp and diverting at E ramp.The results indicate that,compared to traditional designs,the optimized Scheme Two offers significant advantages in terms of both land usage and construction costs.However,it features complex intersecting sections and hard-to-identify diversion points,necessitating the addition of traffic safety facilities to ensure drivers can correctly navigate into the appropriate lanes well in advance.The recommended solution has a wide range of applications,but the selection of composite interchanges in high traffic situations should be carefully considered.