岩土力学2017，Vol.38Issue(2)：309-316,324,9.DOI:10.16285/j.rsm.2017.02.001
振动荷载作用下软土加速蠕变的微观机制研究
Research on microscopic mechanism of accelerated creep of soft clay under vibration loads
摘要
Abstract
Through researching variation of soft clay microstructure in accelerated creep condition,we can deeply understand internal mechanism of accelerated creep characteristics.According to the micro quantitative technology and triaxial creep test of a variety of conditions of soft clay in Tianjin area,comparison between microstructures of soil samples under static and dynamic loads is made for explaining creep mechanism from microcosm.Research shows that the abundance and complexity of the structure element reduce when the accelerated creep appears,and the shape of the structural unit body becomes oblate and tends to smooth edges.Soil particle has no obvious directional property under natural condition.The particle orientation enhances obviously after the accelerated creep.Vibration loads make the creep degree increase and the soil creep rate be accelerated.It reveals that the accelerated creep of soil mass is actually a self adjusting and reengineering process of the soil internal structure under dynamic loads.关键词
软土/加速蠕变/孔隙/颗粒/微观结构Key words
soft clay/accelerated creep/pore/particle/microstructure分类
建筑与水利引用本文复制引用
雷华阳,卢海滨,王学超,李宾,任倩..振动荷载作用下软土加速蠕变的微观机制研究[J].岩土力学,2017,38(2):309-316,324,9.基金项目
国家自然科学基金项目(No.51378344) （No.51378344）
天津市应用基础与前沿技术研究计划项目(No.14JCYBJC21700) （No.14JCYBJC21700）
天津市科技兴海项目(No.KJXH2013-15).This work was supported by the National Natural Science Foundation of China(51378344),the Tianjin Research Program of Application Foundation and Advanced Technology(14JCYBJC21700) and the Tianjin Re search Program of Developing the Ocean by Science and Technology (KJXH2013-15). （No.KJXH2013-15）
