摘要
粉质黏土在不受外力干扰的情况下,强度较高,但在外力扰动作用下,其结构遭受破坏时,土的强度降低,压缩性增高,压路机碾压时,无法碾压至规定的路基压实度,且会出现软弹现象。在路基高度小于路床高度(0.8m)的低填浅挖段,如不进行处理,则无法达到规范要求的压实度要求。针对此种现象,在现场采用不同的处理方法分别做了试验段,通过试验段的效果寻找最经济合理的路基处理方案。
The strength of silty clay is high when there is no external force on it,while when there is external force which will damage its structure,its strength will reduce,the compressibility will increase and the required compaction cannot be reached when compacted by rollers due to appearance of soft elastic phenomenon.For the section of low fill shallow excavation （height of embankment is 0.8m less than the height of roadbed）,the re-quired compaction cannot be reached without the treatment.Trials of different treatment methods have been car-ried out,in order to find out the best economic and reasonable embankment treatment methods.
出处
《广东公路交通》
2015年第2期55-58,共4页
Guangdong Highway Communications
关键词
粉质黏土
湿陷性
含水量
压实度
持力层
silty clay
moisture content
degree of compaction
supporting course
