岩土工程学报2024，Vol.46Issue(z2)：82-86,5.DOI:10.11779/CJGE2024S20005
粉砂与粉土固结蠕变特性对比的试验研究
Experimental study on comparison of consolidation creep characteristics between silty sand and silty soil
朱军 1陈少波 2英旭 2周游 2张思煜3
作者信息
- 1. 无锡地铁集团有限公司,江苏 无锡 214023
- 2. 上海隧道工程有限公司,上海 200032
- 3. 南京工业大学岩土工程研究所,江苏 南京 211816
- 折叠
摘要
Abstract
In order to explain the lagging settlement in the surrounding ground induced by pre-dewatering of excavations,one-dimensional consolidation creep tests are conducted on typical silty sand and silty soil at a metro station site of Jiangsu Province.Based on the experimental results,the compression index,rebound index and secondary consolidation coefficient of the soil are obtained,and the empirical relationships between the rebound index and the compression index,as well as the secondary consolidation coefficient and the compression index,are given.The results of the creep tests demonstrate a well-defined linear relationship between the secondary consolidation coefficient and the consolidation load for both the silty sand and the silty soil,leading to the development of an empirical formula correlating the secondary consolidation coefficient with consolidation pressure.Furthermore,the increase in the secondary consolidation coefficient with rising consolidation pressure is explained from the perspective of the natural structural breakdown of the sandy soil under consolidation pressure.These findings provide valuable experimental evidence for understanding the lagging effects of ground settlement around the excavations induced by pre-dewatering and for the rational estimation of ground settlement.关键词
粉砂/粉土/蠕变/次固结系数/压缩指数/回弹指数Key words
silty sand/silty soil/creep/secondary consolidation coefficient/compression index/swell index分类
建筑与水利引用本文复制引用
朱军,陈少波,英旭,周游,张思煜..粉砂与粉土固结蠕变特性对比的试验研究[J].岩土工程学报,2024,46(z2):82-86,5.
