工程地质学报2025，Vol.33Issue(3)：898-907,10.DOI:10.13544/j.cnki.jeg.2022-0464
法向循环荷载下细颗粒氯盐渍土剪切特性研究
SHEAR BEHAVIOR OF FINE CHLORINE SALINE SOIL UNDER NORMAL CYCLIC LOADING
摘要
Abstract
We conducted a series of shear tests to understand the shear properties of the chlorine saline soil by var-ying the parameters including the initial moisture content,the dead load,and the amplitude and frequency of the normal cyclic load.The results indicate that the moisture content has a significant effect on the residual shear strength.A few tiny cracks appear at the interface zone as moisture content is close to the optimum value.For the moisture content below the optimum value,several small cracks appear due to the shear dilation at the early stage and then disappear gradually at the residual stage.We observed the cracks between the crumbling soil when the moisture content was above the optimum value.Moreover,the existing cracks expand dramatically due to the cyclic loading,which might be the main reason for the differential settlement of the chloride saline soil foundation.The low-frequency normal force only decreases the residual strength,while the high frequency increases both peak and residual strength.Meanwhile,we observed that there was a time difference between the shear stress and normal stress due to the particle rearrangement.The control parameters of the time difference are particle size and distribu-tion.关键词
氯盐渍土/剪切强度/交通荷载/含水率Key words
The chlorine saline soil/Shear strength/Cyclic loading/The moisture contents分类
天文与地球科学引用本文复制引用
侯娟,张宸,张金榜,马艳霞,张吾渝..法向循环荷载下细颗粒氯盐渍土剪切特性研究[J].工程地质学报,2025,33(3):898-907,10.基金项目
国家自然科学基金项目(资助号:52478349,51978390,51778353),国家留学基金项目(资助号:CSC201906895014),岩土工程国家重点实验室开放研究基金项目(资助号:Z018007).This research is supported by the National Natural Science Foundation of China(Grant Nos.52478349,51978390,51778353),China Scholarship Council(Grant No.CSC 01906895014)and Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences(Grant No.Z018007). （资助号:52478349,51978390,51778353）
