摘要
结合湖南宁道高速公路建设项目,提出在半刚性底基层与路基之间设置碎石垫层,以起到排水和透气的作用,并拟定了7种级配类型,通过对不同级配的吸水率、固体体积率及CBR值的试验分析,提出了适合南方湿热地区碎石垫层的合理级配范围。
Combined with the construction of Ningdao Expressway in Hunan,it was suggested that a gravel cushion should be set between semi-rigid base course and subgrade,serving the functions of drainage and ventilation. Seven types of gradations were made,and experimental analysis was carried out on water absorption, solid volume ratio and CBR value,based on which the gradation range for gravel cushion in southern hot and humid area was presented.
出处
《筑路机械与施工机械化》
2012年第11期47-49,共3页
Road Machinery & Construction Mechanization
基金
国家自然科学基金项目(51038002)
关键词
碎石垫层
吸水性
固体体积率
级配范围
gravel cushion
water absorption
solid volume ratio
gradation range
