四岔十字形枢纽互通立交方案设计及比选

Design and Comparison of Four-fork Cross-shaped Junction Interchange Scheme

摘要:

枢纽互通式立交应满足高速公路之间交通流转换的功能需要，因此，要根据其在路网中的交通功能，结合交通量、地形条件、技术指标、工程规模、服务水平等控制性因素进行多方案设计比选。以广西省桂林外环高速与G72泉南高速枢纽互通设计方案为例，从项目的功能定位、建设必要性、交通量预测等多角度分析方案一（单环式变形苜蓿叶形）与方案二（对角象限双环式变形苜蓿叶形）的优劣，通过综合比选，确定选用方案一，即单环式变形苜蓿叶形枢纽为最终方案。

Abstract:

The junction interchange should meet the functional needs of traffic flow conversion among expressways. Therefore, according to its traffic function in the road network, combined with the traffic volume, topographic conditions, technical indicators, engineering scale, service level and other controlling factors, the multi-scheme design should be compared and selected. Taking the design scheme of junction interchange between Guilin Outer Ring Expressway and G72 Quannan Expressway in Guangxi Province as an example, the advantages and disadvantages of Scheme 1 (single-ring cloverleaf shape) and Scheme 2 (diagonal quadrant double-ring cloverleaf shape) are analyzed from the multiple perspectives such as function positioning, construction necessity and traffic volume prediction of the project. Through comprehensive comparison and selection, it is determined that Scheme 1 (single-ring cloverleaf shape) is the final scheme of interchange.