Drained responses of granular soil sheared under inclined principal stress axes: Impact of sample preparation
Drained responses of granular soil sheared under inclined principal stress axes: Impact of sample preparation
复制标题
DOI：
10.1016/j.enggeo.2018.05.002
复制
发表时间：
2018-07
影响因子：
7.4
通讯作者：
Cai Yuanqiang-;Song Xuewei-;Qi Sun;Quanyang Dong;Jun Wang
中科院分区：
文献类型：
--
作者：
Cai Yuanqiang-;Song Xuewei-;Qi Sun;Quanyang Dong;Jun Wang
以往的研究发现，制样方法和制得的砂组构对砂的行为有显著的影响。在本研究中，在实验室中通过干沉积（DD）法和湿沉积（MT）法制备砂样，以创建两种不同的初始砂组构。在固定但倾斜的主应力轴下对这些试样进行了排水空心圆柱试验。试验结果表明，大主应力方向对DD岩样的偏应变和体应变发展的影响大于MT岩样。与MT系列相比，DD系列的特征状态点对应的应力比R更高。DD岩样的抗剪强度高于MT岩样，但受大主应力方向的影响较大。在低应力比（R≤ 0.1）下，DD试样的非共轴性比MT试样强。
Previous studies have found that the sample preparation method and the resulting sand fabric have significant effect on sand behavior. In the present study, sand specimens were prepared in the laboratory by dry deposition (DD) method and moist tamping (MT) method to create two distinct initial fabrics of sand. Drained hollow cylinder tests were carried out on these specimens under fixed but inclined principal stress axes. Test results show that the major principal stress direction has greater influence on the development of both deviatoric and volumetric strains for DD samples than for MT. DD samples tend to have a higher stress ratioRcorresponding to the characteristic state point than MT series. Moreover, the shear strength of DD samples is higher than MT, but significantly influenced by the major principal stress direction. DD samples show stronger non-coaxiality than MT samples under low stress ratio (R≤ 0.1).