基于路面排水需求的超高过渡段临界纵坡量化研究

Quantitative Research on Critical Longitudinal Slope of Ultra-High Transition Section Based on Pavement Drainage Demand

路线平纵横组合不当,导致排水盲区存在,往往是造成公路路面排水不畅的根本原因,以超高过渡段存在频率尤多。将超高过渡段划分成两区三线,对两区横断面坡度变化进行分析,对三线考虑附加纵坡叠合效果,而后利用合成纵坡将二者结合,得出超高过渡段不同区域的临界纵坡要求。

The improper combination of transverse,vertical and horizontal routes leads to the existence of blind drainage areas.Poor drainage of highway pavements is often the root cause,especially in ultra-high transition sections.This paper divides the ultra-high transition section into two areas and three lines and analyzes the changes of the transverse section slope in the two areas,considers the superimposition effect of the additional longitudinal slope for the three lines,and then uses the synthetic longitudinal slope to combine the two to obtain the critical longitudinal slope requirements of the different areas of the ultra-high transition section.