摘要
不同类型的黄土具有不同的组成结构、易溶盐、石膏和碳酸钙含量,影响黄土填料的CBR值。采用室内试验方法,进行不同压实度、含水量和浸水时间的CBR值测定,分析了他们对黄土填料CBR值的影响规律。试验结果表明,黄土填料CBR值随压实度的增大而增大,在最佳含水量下,土体的CBR值达到最大值,随浸水时间的增加CBR值迅速减小。结果可为确定不同地区类型的黄土路基的CBR值提供参考。
The grain structure of different loess types, diftluent salt gypsum, gypsum content and carbonate of lime content, are the influencing factors of CBR value of loess filler. The CBR values of different degree of compaction, water content and immersion time are obtained through lab experiment. The influence of these factors on CBR of the loess filler is analyzed. The test results show that, the larger the degree of compaction, the greater the CBR value of loess filler, the CBR reaches a maximum value if the water content is optimum, and decreases rapidly with increasing immersion time. The results of the research can be used for reference in obtaining CBR value of different type loess subgrade.
出处
《华中科技大学学报（城市科学版）》
CAS
2009年第3期38-40,62,共4页
Journal of Huazhong University of Science and Technology
基金
陕西省教育厅重点实验室访问学者项目(09JS024)
陕西省交通科技研究项目(08-21K)
关键词
道路工程
黄土填料
CBR
压实度
含水量
浸水时间
Road engineering
loess filler
CBR value
degree of compaction
water content
immersion time
