水道港口2017，Vol.38Issue(6)：626-631,6.
软粘土路基沉降的蠕变效应研究
Study on creep properties of soft clay and settlement of subgrade
李科锋 1谭儒蛟 2邱长林 1袁宇1
作者信息
- 1. 天津大学水利工程仿真与安全国家重点实验室,天津300072
- 2. 天津市市政工程设计研究院,天津300072
- 折叠
摘要
Abstract
The thick soft clay is widely distributed in Tianjin coastal region.It is significant to study creep properties of soft clay to predict the deformation and long-term stability of soil foundations in this area.In this pa-per, one-dimensional consolidation creep tests on typical soft clay of Tianjin coastal region were conducted and a constitutive model was established based on the time-hardening law.According to the experimental data, three creep parameters were determined, which were strain rate coefficient A, stress index n and time index m.Com-bined with a road project in Tianjin coastal region, a road settlement model considering both consolidation and creep of soft clay was established using the finite element software of ABAQUS.The embankment settlements be-tween two different models were compared:One has considered the influence of creep, while the other has not.It is shown that the creep properties of this clay are obvious, for which the calculation result of embankment settlement considering the creep properties is in good agreement with the measured data.What′s more, the settlement of the calculation result is 1 .2 times the settlement only considering consolidation and the settlement caused by creep ac-counts for 50％of the final post-construction settlement.关键词
软土/时间硬化蠕变定律/路基沉降/固结-蠕变Key words
soft clay/time-hardening law/subgrade settlement/consolidation-creep分类
建筑与水利引用本文复制引用
李科锋,谭儒蛟,邱长林,袁宇..软粘土路基沉降的蠕变效应研究[J].水道港口,2017,38(6):626-631,6.
