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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 effect of drainage pavement structure with edge drainage system, based on the theory of unsaturated seepage, the rainfall infiltration of expressway pavement structure is numerically simulated and analyzed, and the seepage analysis model of two-dimensional pavement structure is established. AASHTO evaluation index t50 drainage performance evaluation. The results show that in the pavement structure without internal drainage system, the rainwater is drained slowly and stays in the grassroots and subsoil for a long time. The drained grassroots pavement structure with edge drainage system can rapidly discharge infiltration rainwater and effectively reduce The volume of water in the structural layer material. Rainwater infiltration from the center divider increases the water content of the surrounding pavement structure.