工程地质学报2016，Vol.24Issue(6)：1182-1190,9.DOI:10.13544/j.cnki.jeg.2016.06.018
浸水－循环加卸载条件下压实膨胀岩的变形特征
DEFORMATION BEHAVIOR OF COMPACTED SWELLING ROCK UNDER SOAKING-CYCLING LOADING AND UNLOADING
摘要
Abstract
There is a clear effect of hydro-mechanical path on the deformation of swelling rock.For the deformation behavior of compacted swelling rock under soaking-cyclicing loading and unloading,1D swelling-circulating compression tests were conducted on Yanji swelling rock with different initial water content.On the basis of compression-rebound curves after swelling,Compression index,swelling index and their difference were obtained and the accumulative total and residual deformation rates were proposed to measure the deformation characteristics under cycling loading and unloading.The study results show that there is a significant negative liner relationship between the swelling ratio and the initial water content.The slope of loading and unloading curve is smaller with the increasing cycles,and the area of hysteresis loop decreases gradually.The compression index,swelling index and their difference increase with the growing cycles.The more the number of cycles,the less the total and residual deformation,and the accumulative total and residual deformation increase firstly,then tend to be stable.The smaller the initial water content,the larger the compression index and swelling index,and the more the accumulative total and residual deformation.The mechanical properties of specimens with different initial water content will be enhanced and normalized by the cycling loading and unloading process.关键词
膨胀岩/初始含水率/浸水/循环加卸载/变形特征Key words
Swelling rock/Initial water content/Soaking/Cycling loading and unloading/Deformation behavior分类
建筑与水利引用本文复制引用
曾志雄,孔令伟,凌贤长,黄珏皓,臧濛..浸水－循环加卸载条件下压实膨胀岩的变形特征[J].工程地质学报,2016,24(6):1182-1190,9.基金项目
国家自然科学基金重点项目（41430634），岩土力学与工程国家重点实验室自主部署项目（Y11002）资助． （）
