基于运行速度的城市地下道路视距检验探讨——以神农路—恒竞路通道为例

Discussion on Sight Distance Test of Urban Underground Roads Based on Running Speed——Taking Shennong Road-Hengjing Road Passage as an Example

通常情况下,道路的视距检验以设计速度为计算标准,然而地下道路的超速情况较严重,建议设计过程中以运行速度为基准,对视距进行验算。文章以已有的城市地下道路运行速度模型为基础,在实际工程设计案例中加以应用,将预测模型计算所得的运行速度值所对应的视距验算结果,与采用设计速度时的计算结果相比较,得出采用运行速度验算视距具有实际应用意义的结论,为新建城市地下道路工程设计过程中线形指标的选取提供参考。

Normally,the sight distance test of roads takes the design speed as the calculation standard,but the overspeed situation on underground roads is serious.It is suggested that the sight distance should be checked based on the running speed in the design process.Based on the existing urban underground road running speed model,this paper applies it in the actual engineering design cases,and compares the calculation results of the sight distance corresponding to the running speed value calculated by the prediction model with the calculation results when the design speed is adopted.It is concluded that the sight distance calculated by the running speed calculation has practical application significance,which provides a reference for the selection of linear indexes in the design process of new urban underground roads.