河北地质大学学报2025，Vol.48Issue(4)：63-68,6.DOI:10.13937/j.cnki.hbdzdxxb.2025.04.008
淤泥质软土蠕变特性及Singh-Mitchell蠕变模型分析
Creep Characteristics of Silty Soft Soil and Analysis of the Singh-Mitchell Creep Model
摘要
Abstract
Mucky silty clay,characterized by its high water content and poor bearing capacity,can significantly impact foundation pit stability when exposed for extended periods without timely support during construction.To investigate the creep characteristics of mucky silty clay,this study utilized undisturbed soil samples from a metro station foundation pit in Ningbo.Conventional triaxial consolidated undrained shear tests and triaxial consolidated undrained shear creep tests were conducted using an MTS servo-hydraulic fatigue testing machine.The experimental results were fitted using the Singh-Mitchell creep model.The test results demonstrate that the soil exhibits significant nonlinear creep effects,with confining pressure and deviatoric stress levels playing crucial roles in creep behavior.As confining pressure increases,deformation during the initial creep stage becomes more pronounced.Under the same confining pressure,higher deviatoric stress leads to greater creep deformation.Under the same deviatoric stress,the greater the confining pressure,the smaller the creep deformation.The fitted Singh-Mitchell creep model effectively describes the entire creep process,from initial to steady-state creep,validating the model's applicability.These findings provide a theoretical basis for long-term deformation prediction in foundation pit engineering within soft soil regions.关键词
淤泥质粉质黏土/三轴试验/蠕变特性/Singh-Mitchell模型Key words
mucky silty clay/triaxial property/creep test/the Singh-Mitchell model分类
建筑与水利引用本文复制引用
吴波,朱虹,马青春,赵世龙..淤泥质软土蠕变特性及Singh-Mitchell蠕变模型分析[J].河北地质大学学报,2025,48(4):63-68,6.基金项目
国家自然科学基金面上项目(52278397) （52278397）
