摘要
为分析不同碾压方式对岛礁珊瑚砂地基处理的效果,文章以马尔代夫维拉纳国际机场改扩建工程为例,研究振动和冲击两种碾压方式下珊瑚砂地基干密度和CBR变化规律。结果表明:振动和冲击两种碾压方式下珊瑚砂地基干密度和CBR均随碾压遍数的增加呈线性增加趋势,但振动碾压方法增加速率更高,尤其对干密度表现更为明显;以干密度≥1.6g/cm3 为质量控制标准时,要求的振动和冲击碾压遍数应分别不小于11遍和27遍。推荐在岛礁珊瑚砂地基处理中优先使用振动碾压法。
In order to analyze the effect of different rolling methods on the treatment of coral sand foundation in island reefs,with the reconstruction and expansion project of Vilana International Airport in Maldives as the example,this article studies the dry density and CBR variation law of coral sand foundation under vibration and impact rolling modes.The results show that the dry density and CBR of coral sand foundation increase linearly with the increase of rolling number under the vibration and impact rolling modes,but the increasing rate under vibratory rolling method is higher,especially for dry density.When the dry density of not less than1.6g/cm3 is used for quality control standard,the required number of vibration and impact rolling passes shall be not less than11 times and27 times respectively.It is recommended to use the vibratory rolling method in the coral sand foundation treatment of island reefs.
作者
李铭
韦港荣
蒋恒
LI Ming;WEI Gang-rong;JIANG Heng(Guangxi Communications Design Group Co.,Ltd.,Nanning,Guangxi,530029;Guangxi Beibu Gulf Investment Group Co.,Ltd.,Nanning,Guangxi,530029;Changsha University of Science & Technology,Changsha,Hunan,410076)
出处
《西部交通科技》
2019年第6期42-44,158,共4页
Western China Communications Science & Technology
关键词
珊瑚砂
地基
振动碾压
冲击碾压
Coral sand
Foundation
Vibratory rolling
Impact rolling
