石灰改良黄土路基的CBR试验研究  

CBR Experiment Study of Loess Subgrade Meliorated with Lime

作　　者：李萍[1] 徐佳祥[1] 温学涛[1] 鱼陇军[1] 

机构地区：[1]兰州理工大学土木工程学院,甘肃兰州730050

出　　处：《甘肃科学学报》2008年第4期74-77,共4页Journal of Gansu Sciences

基　　金：兰州理工大学博士基金(42001)

摘　　要：以银武大通道罗定高速公路定西段黄土为研究对象,分析不同含水量、石灰剂量、浸水时间和击实次数对黄土与石灰土的CBR值影响.结果表明:黄土的CBR值对含水量变化比较敏感,掺拌生石灰后,石灰土的CBR对水的敏感性逐渐减小,其水稳性也优于黄土;在不考虑石灰土强度随龄期增长的条件下,最佳石灰剂量范围在1%～3%之间,石灰土被充分压实后再浸水4 d的CBR值可满足规范要求.CBR experiment is an index on quality control of subgrade engineering and road surface design about highways and runways.According to loess surgrade of Luo Ding freeway located in Ding-Xi region,CBR values of loess and lime soil are analysed under the influences of different water contents,lime dosages,foundering times and compacting degrees.Experimental results indicate that CBR values of loess are very sensitive to water contents.Whereas quicklime is sophisticated into loess,this sensitivity of water cont...

关 键 词：CBR 黄土 石灰土 路基 

分 类 号：U416.1[交通运输工程—道路与铁道工程]