软土地区低路堤路基相对高度与纵坡设计

胡文儿¹，杨戈²

（1上海沪洋高速公路发展有限公司，2 同济大学道路与交通工程教育部重点实验室）

摘要： 软土地区低路堤路基相对高度的确定，地下水位是主要因素。本文依托沪芦高速公路工程实例，系统总结了工程沿线的地下水位变化规律，研究了地下水位对路基湿度的影响以及与土张力之间的关系，提出了路基相对高度最小值以及纵坡设计中路基及路面最小设计标高确定的原则与方法。

关键词：路基；相对高度；地下水位；湿度；土张力；最小值

                          The Relative Height of Low Pavement Subgrade and the Design of Elevation of Pavement in Soft Soil Area

Hu Wen-er   Yang Ge

Abstract: Groundwater level is one of the most important factors to determine the relative height of pavement subgrade in soft soil area. Based on the engineering of Hu-lu freeway, it concludes the rule of variation about groundwater level in the paper. Besides, the effect of groundwater level on the humidity of subgrade and the relation between Groundwater and capillary of subgrade soil are analyzed. The formula of the minimum relatively height of pavement subgrade and the minimum elevation of pavement are established on the basis of the rule and relation mentioned above.

Keywords: subgrade; relative height; groundwater level; humidity; capillary; the minimum