路基工程Issue(2)：57-62,6.DOI:10.13379/j.issn.1003-8825.202404061
冻融循环条件下黏土抗剪强度试验研究
Experimental Study on Shear Strength of Clay under Freeze-Thaw Cycles
摘要
Abstract
Through the freeze-thaw cycle treatment of the subgrade soil of Shigang Railway Passenger Dedicated Line in Cangzhou,the influence of number of freeze-thaw cycles and the freezing rate on the shear strength of the soil mass was analyzed by using the control variable method.The result shows that,the shear strength of clay decreases with the increase of the number of freeze-thaw cycles,and changes greatly in the first seven cycles.After one cycle,the soil mass undergoes strain softening.After three cycles,the shear strength begins to decrease,and gradually approaches the equilibrium strength after seven cycles.At twenty cycles,it is basically attributed to an average value.The freezing rate bears a significant effect on the shear strength,and theslower freezing rate will lead to lower shear strength.In engineering practice,it is best to construct the basic components and experience at least a complete freeze-thaw cycle before applying the load,so as to improve the reliability and safety and reduce the maintenance cost.关键词
黏土/冻融循环/固结/抗剪强度/冻融速率/稳定性Key words
clay/freeze-thaw cycle/consolidation/shear strength/freeze-thaw rate/stability分类
建筑与水利引用本文复制引用
王永辉..冻融循环条件下黏土抗剪强度试验研究[J].路基工程,2025,(2):57-62,6.基金项目
国家自然科学基金项目(51878657) （51878657）
广东省自然科学基金项目(2022A1515011200) （2022A1515011200）
广东省科技计划项目(STKJ2021129) （STKJ2021129）
深部岩土力学与地下工程国家重点实验室开放基金课题项目(SKLGDUEK2005) （SKLGDUEK2005）
