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为获取海南潮湿多雨气候挖方路基湿度演变特征及其影响因素,基于湿度演变特征和影响因素,提出挖方路基适宜的路基防排水措施。本文通过预埋水分传感器的方式,进行了现场测试。结果表明,粉土质砂挖方路基受大气降雨的影响显著。未铺筑路面情况下,挖方路基的湿度波动幅度达20%,经历一年的降雨作用后,路基湿度较初始湿度增加约8%。路基湿度变化相对于降雨时间有一定的滞后性。边沟附近路基湿度变化显著。因此,海南省公路挖方路基防排水系统应特别重视路面边缘防排水设计,毛细水作用显著的路段应采用设置毛细水隔离层、地下排水渗沟等措施。
In order to obtain the characteristics and influencing factors of moisture evolution of wet and rainy climate roadbed in Hainan, based on the characteristics of humidity evolution and influencing factors, the suitable subgrade embankment drainage measures are proposed. This article through the embedded moisture sensor way, conducted a field test. The results show that silt sand excavation roadbed is significantly affected by the rainfall. Under the condition of unpaved pavement, the humidity of excavation roadbed fluctuated by 20%. After one year’s rainfall, the subgrade humidity increased about 8% compared with the initial humidity. Subgrade humidity changes relative to the rainfall time has a certain lag. Subgrade ditch near the significant changes in humidity. Therefore, road excavation and drainage system in Hainan Province excavation should pay special attention to waterproofing and drainage design of pavement edge. Where there is significant capillary water effect, measures such as capillary water isolation and underground drainage gully shall be adopted.