东乡复合式互通立交改扩建方案研究

Research on the Reconstruction and Expansion Plan of Dongxiang Composite Interchange

以沪昆高速梨园(赣浙界)至东乡段改扩建工程中东乡复合式互通立交改扩建项目为研究对象,对互通现状存在的问题、交通量的预测及车道数平衡等分析,提出3个改扩建方案,即方案1以集散车道的方式连接与方案2、方案3以分离车道的方式连接的比较,方案2东乡互通起点段采用主线单侧加宽方案,方案3全互通段主线均采用双侧加宽方案的比较,经通行能力计算分析得出了3个方案均满足通行能力要求。综合考虑主交通流方向、行车安全及施工阶段保通等因素最终确定方案3为项目最优方案。

Taking the Dongxiang composite interchange renovation and expansion project in the Liyuan(Jiangxi Zhejiang border)to Dongxiang section of the Shanghai Kunming Expressway as the research object,this study analyzes the problems existing in the current situation of the interchange,predicts traffic volume,and balances the number of lanes.Three renovation and expansion plans are proposed,namely,the first plan connects by collecting and dispersing lanes,and the second plan connects by separating lanes.The starting section of the Dongxiang interchange in the second plan adopts a single-sided widening plan for the main line,and the third plan adopts a double-sided widening plan for the main line of the entire interchange section.After calculating and analyzing the traffic capacity,it is found that all three plans meet the traffic capacity requirements.Taking into account factors such as the direction of the main traffic flow,driving safety,and ensuring smooth traffic during the construction phase,Plan Three has been ultimately determined as the optimal solution for the project.