广东高速公路路基内部含水率现场监测与分析  

Field experimental study on moisture content in subgrade in Guangdong expressway

作　　者：钱尼贵[1,2] 王端宜[1] 孙晓立 石立万[1] 

机构地区：[1]华南理工大学土木与交通学院,广东广州510641 [2]广东华路交通科技有限公司,广东广州510420

出　　处：《长安大学学报（自然科学版）》2015年第2期52-58,共7页Journal of Chang’an University(Natural Science Edition)

基　　金：广东省交通运输厅科技项目(2005-38;2009-02-009)

摘　　要：针对广东省多雨、潮湿的气候特征,为了掌握路基内部含水率的真实变化情况,首次在2条高速公路试验段路基内部埋设水分传感器,进行路基含水率现场长期监测,分析其变化规律与原因。研究结果表明:路基内部含水率一直处于动态变化状态,主要与气候环境、路面质量状况、路堤结构型式及地下水位变化等诸多因素有关,并在一定条件下,达到相对平衡状态;当路面质量状况良好,路面入渗量很小时,路基内部含水率可一直处于疏干状态;反之当路面状况很差,路面入渗量很大,且排水系统较差时,路基可长时间处于饱和状态,对路面结构受力造成不利影响;路基内部含水率现场监测结果对完善路基路面防排水设计与施工具有重要参考价值。In order to reflect the real situation of moisture content changes in subgrade under the rainy,wet climate in Guangdong Province,humidity sensors were installed in subgrade at two highway test sections firstly.The long-term changes of the subgrade moisture content were monitored,and the change rules and causes of the variation were analyzed.The result shows that moisture content in subgrade is always in the state of dynamic change which is mainly affected by the climate,the quality of pavement,the embankment structure and the ground water level,etc.Under certain conditions moisture content reaches a relative equilibrium.Moisture content in subgrade is in a drainage condition all the time with high quality of pavement and small infiltration,otherwise moisture content is in a saturated condition with bad quality of pavement,high infiltration and bad drainage system which is very harmful to pavement structure.The result shows its important reference value to the design and construction of pavement structure.

关 键 词：道路工程 路基 平衡含水率 现场监测 疏干状态 饱和状态 

分 类 号：U416.1[交通运输工程—道路与铁道工程]