岩土力学2025，Vol.46Issue(11)：3383-3394,3409,13.DOI:10.16285/j.rsm.2024.1513
盐渍化粉土的蠕变特征及模型研究
Creep characteristics and model of salinized silt
摘要
Abstract
A widely distributed salinized silt in Northwest China exhibits the physical characteristics of both low-liquid-limit silt and saline soil,yet its long-term deformation behavior remains insufficiently understood.A series of uniaxial creep tests were conducted to investigate its creep properties under varying conditions of salt content,dry density,moisture content,and overburden stress.Test results indicate that,compared to salt-free soil,the creep rate of salinized silt accelerates significantly with increasing salt content,demonstrating more pronounced nonlinear creep characteristics.The final strain of the salt-washed soil was 10%,which increased to 14%at a salt content of 6.4%.To more accurately characterize the soil's creep behavior,the classical creep models were modified,leading to the proposal of two new models:an integer-order model and a fractional-order model.Comparative analysis between the experimental data and the improved models shows that both proposed models describe the actual deformation characteristics more accurately than the classical creep model.However,the integer-order model lacks refinement in describing the decay creep stage,whereas the fractional-order model demonstrates superior accuracy in capturing the detailed features of all creep stages and is therefore recommended for effectively predicting the creep behavior of salinized silt.关键词
盐渍化粉土/蠕变试验/分数阶元件模型/Abel弹壶/应力-应变等时曲线Key words
salinized silt/creep test/fractional-order component model/Abel bomb pot/stress-strain isochronous curve分类
建筑与水利引用本文复制引用
潘超钒,张晨,张星星,蔡正银,王旭东..盐渍化粉土的蠕变特征及模型研究[J].岩土力学,2025,46(11):3383-3394,3409,13.基金项目
新疆水发水务集团有限公司员工科研项目(No.JWYX36/2022) （No.JWYX36/2022）
江苏省自然科学基金资助项目(No.BK20221193) （No.BK20221193）
南京水利科学研究院基金(No.Y323008,No.Yy324010).This work was supported by the Scientific Research Project of Xinjiang Shuifa Water Group Co.,Ltd.(JWYX36/2022),Jiangsu Natural Science Foundation(BK20221193)and Nanjing Hydraulic Research Institute Fund(Y323008,Yy324010). （No.Y323008,No.Yy324010）
