大件运输对高速公路互通匝道设计的影响分析

Analysis of Influence of Heavy Transportation on Expressway Interchange Ramp Design

高速公路互通匝道的设计依据主要是最大服务交通量、占地面积等因素,一般不考虑大件运输,因此,目前高速公路互通匝道的大件运输通行能力一般明显低于高速公路主线。相较于交通组织、结构加固、车辆绕行等手段,如果互通立交在设计之初便考虑到了大件运输车辆通行的需求,则可能提升社会与经济效益。通过分析大件运输对高速公路互通匝道设计的影响,探讨了如何通过调整互通立交的设计线形和匝道桥的计算参数,使互通立交的几何空间和结构条件能够满足大件运输通行车辆的需要。该分析结果可供设计人员参考。

The design of expressway interchange ramp mainly base on factors such as the maximum service traffic volume,area,etc.Generally,heavy transportation is not considered.At present,the heavy transportation capacity of the ramp is generally significantly lower than that of the main line.Compared with the means of traffic organization,structural reinforcement,and vehicle bypassing,that considering the needs of heavy transportation at the beginning of the interchange design will improve the social and economic benefits.By analyzing the influence of heavy transportation on the design of interchange ramps,how to adjust the design alignment of interchanges and the calculation parameters of ramp bridges are explored to make the geometric space and structural conditions of interchanges meet the needs of heavy transportation for reference of designers.