中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 2017, Vol. 36 ›› Issue (12): 47-52.DOI: 10.3969/j.issn.1674-0696.2017.12.09

• 道路与铁道工程 • 上一篇    下一篇

广州地区公路路基含水率季节性变化规律的现场试验研究

徐国元1,杨俭1,林立新2,黄灏2   

  1. (1.华南理工大学 土木与交通学院,广东 广州 510640; 2. 广东省路桥规划研究中心,广东 广州 510635)
  • 收稿日期:2016-09-20 修回日期:2016-11-15 出版日期:2017-12-18 发布日期:2017-12-18
  • 作者简介:徐国元(1964—),男,广东广州人,教授,博士生导师,主要从事路基工程方面的教学与科研工作。 E-mail: gyxu@scut.edu.cn。 通信作者:杨俭(1991—),男,湖南邵阳人,硕士研究生,主要从事道路工程与岩土工程方面的研究工作。E-mail:2419852745@qq.com。
  • 基金资助:
    国家自然科学基金项目(51078151); 广东省公路管理局行业支撑性科研课题(2014-6)

Field Experimental Study on Seasonal Variation Rule of Water Content of Highway Subgrade in Guangzhou Area

XU Guoyuan1,YANG Jian1,LIN Lixin2,HUANG Hao2   

  1. (1.School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640, Guangdong,P. R. China; 2. Guangdong Province Highway Bridge Planning and Research Center, Guangzhou 510635,Guangdong,P. R. China)
  • Received:2016-09-20 Revised:2016-11-15 Online:2017-12-18 Published:2017-12-18

摘要: 为了研究广州地区公路路基含水率的季节性变化规律,并提出合理的路基含水率变化模型,选取广州北二环高速公路的一段填方路基,采用埋设水 分传感器的方式,对不同深度路基体积含水率进行了为期1年的现场实测。结果表明:广州地区降雨主要集中在4—10月份;路基体积含水率峰值在5—8月 份,均超过0.33 m3/m3,随降雨量变化呈现出波动状态;不同深度路基体积含水率变异系数最大值均出现在5—7月份的雨季,且主要集中在路床部分;路 基内部体积含水率随时间呈现出周期性变化规律,回归分析表明月平均体积含水率变化规律与月份具有良好的正弦函数关系,且其变化幅度与路基深度之 间的关系能用指数函数来表征。

关键词: 道路工程, 路基含水率, 现场测试, 降雨量, 变异系数

Abstract: In order to study the seasonal variation rule of water content of highway subgrade in Guangzhou area and put forward a reasonable model of the water content variation of the subgrade,the fill subgrade of North Second Ring Expressway of Guangzhou was selected,and the volume moisture content of subgrade in different depth was measured in filed for 1 year by embedding water sensor. The results show that the rainfall in Guangzhou area mainly concentrates in April to October; and the peak values of the volumetric moisture content of subgrade occur in May to August,which all exceed 0.33 m3 /m3 and fluctuate with rainfall. All the maximum values of variation coefficients of volumetric moisture content of subgrade with different depth appear in the rainy season of May to July, and mainly concentrate in the roadbed. The volumetric moisture content of subgrade exhibits a periodic variation rule with time. The regression analysis shows that the variation rule of the monthly average water content has a good sine function relationship with the month,and the relationship between the variation range and the depth of the subgrade can be characterized by exponential function.

Key words: highway engineering, water content of subgrade, field test, rainfall, variation coefficient

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