高液限土作为路堤填料时含水率控制指标研究  

Water Content Control Indicators Research of High Liquid Limit Soil in Embankment Filler

作　　者：陈兴专[1,2] 洪宝宁[1,2] 刘鑫[1,3] 

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点实验室 [2]岩土工程科学研究所 [3]隧道与城市轨道工程研究所,南京210098

出　　处：《科学技术与工程》2013年第1期98-101,120,共5页Science Technology and Engineering

基　　金：国家自然科学基金资助项目(51079052);中央高校基本科研业务费专项资金资助项目(2012B03014);广东省交通厅基金项目(200903)资助

摘　　要：为了使高液限土在填筑过程中达到设计压实度,提出了容许含水率的概念。另外,对不同的高液限黏土进行压实度统计得出,压实过程中土的容许含水率与最优含水率的差值在6%左右时,压实度仍可以达到90%。采用普通直剪仪进行高液限土的快剪试验,得出含水率变化对高液限土抗剪强度产生影响,含水率越高,对应的抗剪强度越低,对应的c、φ值也相应降低。通过CBR试验结果分析,高液限土路堤只要满足容许含水率,就能具有较高的强度、较好的抗变形能力和良好的稳定性。In order to meet the designed degree of compaction in the high liquid limit soil filling process, the concept of allowed water content is created. A conclusion is made based on different data of high liquid limit clay about the degree of compaction： As the degree of compaction reaches percent 90, the difference between allowed water content and best water content reaches percent 6. Using a common direct shear apparatus for high liquid limit soil＇ s fast shear test, the influence towards high liquid limit soil＇ s shear strength by the change of water content is get that the higher water content can lead to the lower shear strength and also reduce the value of c and φ. Through analysis of the results of CBR test, the allowed water content high liquid limit soil can obtain high strength,good re- sistance to deformation and good stability.

关 键 词：高液限土 容许含水量 快剪实验 CBR 

分 类 号：U416.15[交通运输工程—道路与铁道工程]