马家堡互通式立交改扩建方案拟定及方案比选

Preparation and Comparison of Majiabu Interchange Reconstruction and Expansion Schemes

文章以马家堡至泾阳高速公路项目中的马家堡互通式立交为研究对象,首先确定其互通位置,然后介绍其交叉位置在路网中的作用并进行交通量预测,充分利用原有立交落地功能改造该互通,组成复合型枢纽。初步设计阶段就匝道利用、施工保通、行车安全和造价等方面对方案进行比选论证,并提出在主线为接近极限最小半径的情况下互通出口型式的选择,以供同类工程参考。

This paper takes Majiabu interchange flyover in Majiabu-Jingyang Expressway project as the research object.Firstly,it determines the interchange position,then introduces the role of the intersection position in the road network and predicts the traffic volume,and makes full use of the original flyover landing function to transform the interchange to form a composite hub.In the preliminary design stage,the schemes are compared and demonstrated from the aspects of ramp utilization,construction guarantee,traffic safety and cost,and the selection of interchange exit type under the condition that the main line is close to the ultimate minimum radius is proposed for the reference of similar projects.