摘要
为了分析带边缘排水系统的排水性基层路面结构的排水效果,基于非饱和渗流理论,对高速公路路面结构降雨入渗进行数值模拟分析,建立了二维路面结构渗流分析模型,并采用AASHTO评价指标t50进行排水性能评价。结果表明:在没有内部排水系统的路面结构中雨水排出很慢,并会在基层与底基层中长时间滞留;带边缘排水系统的排水性基层路面结构可以迅速地排出入渗的雨水,有效降低结构层材料的体积含水量。中央分隔带的雨水入渗会提高周围路面结构层的含水量。
In order to analyze the drainage performance of the pavement structure with permeable base course and edge drainage system,based on the theory of unsaturated seepage,the rainfall infiltration into the highway pavement structure is simulated numerically and the two-dimensional seepage analysis model is set up.The AASHTO evaluation index t50 is employed to evaluate the drainage performance.The results show that,in comparison with the pavement structure without the internal drainage system,the water can be drained away from the structure with the permeable base course and edge drainage system more rapidly and the volume water content is reduced effectively in pavement.It is very slow for water to be drained away from the central separate belt,and this increases the water content of the layers around.
出处
《公路》
北大核心
2011年第2期12-17,共6页
Highway
基金
国家自然科学基金项目
项目编号50708056
山东省优秀中青年科学家科研奖励基金项目
项目编号2008BS09015
关键词
道路工程
排水性能
边缘排水
排水基层
road engineering
drainage performance
edge drainage
permeable base course
