作　　者： ; ; ;

机构地区： 东北林业大学土木工程学院

出　　处： 《湖南科技大学学报（自然科学版）》 2007年第3期50-55,共6页

摘　　要： 分别采用单线法和双线法对原状Q3黄土进行了增、减湿情况下的单轴压缩试验.根据试验结果,总结出了黄土的压缩变形随饱和度变化的规律,发现无论单线法还是双线法,黄土的压缩性均随增湿而提高,随减湿而降低.由两种方法得到的黄土的压缩性规律虽然基本相同,但还存在一定差异:初始含水量较低时,单线法的压缩性小于双线法;当初始含水量达到某个值时,两者的压缩曲线表现出交叉现象;当初始含水量超过该值时,单线法的压缩性逐渐大于双线法.这种现象是由黄土本身的特殊结构性所决定的.对同一种黄土而言,不论增(减)湿后试样的初始含水量如何,采用的方法是否相同,浸水后试样的压缩性相差不大. Single-line method and double-line method were adopted respectively to carry out uniaxial compression test on undisturbed loess （Q3） in the case of moistening or demoistening. According to the results, the characteristics of compression deformation of loess changing with saturation level are presented. It indicated that, whether single-line method or double-line method, the compressibility of loess increases with moistening and decreases with demoistening. The regularities of loess compressibility got from two methods are almost the same, but there is still some difference. The compressibility of single-line method is smaller than that of double-line method for lower initial moisture content, and is larger than that of double-line method for higher initial moisture content. For certain value of initial moisture content in between, compressibility curves of two methods will intersect. This phenomenon is caused by special structure of loess. For the same loess, the compressibility of soaked samples is almost the same and has no relation with the test method adopted and the initial moisture content of samples after moistened or demoistened. 8figs., ltab., 12refs.

关 键 词： 土力学 黄土 增 减 湿 压缩变形 单线法 双线法

领　　域： [建筑科学] [建筑科学]