山区高速公路挖石方段沥青路面地下水损害处治技术研究

采用雷达技术，对石太高速公路山区挖石方段路基路面进行检测分析，发现沥青路面发生翻浆、沉陷和龟裂病害的主要原因是地下水浸入路基导致路基顶面潮湿松散。通过采取在硬路肩下设置路基纵向渗沟、在路面结构层中增设级配碎石排水层、贫水泥混凝土封水层等相应的技术措施，取得了良好的技术效果，避免了以往路面当年挖补当年又破坏的循环维修状况，可供山区高速公路路面新建与维修养护工作借鉴。

Treatment Technology for Asphalt Pavement Groundwater Damage of Excavation Section of Expressway in Mountainous Area

Using radar technology to test and analyze the subgrade and pavement of excavation sections of Shijiazhuang-Taiyuan expressway in mountainous areas,the result shows that the main cause of frost boiling,subsidence and honeycomb cracks of asphalt pavement is that the surface of subgrade becomes wet and incompact induced by groundwater immerging into subgrade.By setting longitudinal blind drain under hardened verge,adding a drainage layer formed by graded broken stone and water-sealing layer formed by cement c...