中文摘要：

膨胀岩的体积变形具有明显的水-力路径效应,为了研究浸水-循环加卸载条件下压实膨胀岩的变形特征,以延吉膨胀岩为研究对象,开展了不同初始含水率试样的一维膨胀-循环压缩试验。根据试样浸水膨胀后的压缩-回弹曲线,确定了压缩指数、回弹指数以及二者之差,并引入累积总变形率和累积残余变形率的概念来表征其在循环加卸载条件下的变形特征。结果表明：膨胀率与初始含水率具有显著的线性负相关关系;随着循环次数增加,加、卸载曲线越来越平缓,卸载-再加载滞回环面积逐渐减小,试样的压缩指数、回弹指数以及二者之差均呈逐渐减小的趋势,单次循环产生的总变形和残余变形逐渐减小,累积总变形和累积残余变形先增加后逐渐趋于稳定;初始含水率越小的试样,压缩指数和回弹指数越大,累积总变形和累积残余变形越大;循环加卸载过程对不同初始含水率试样的力学性质有强化和同化作用。

英文摘要：

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. Thesmaller 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.