The distinct initial fabrics of sand may give rise to dramatically different responses to the applied loading, as evidenced by numerous laboratory tests reported in the literature. In this study, both dry deposition (DD) and moist tamping (MT) methods were employed to prepare sand specimens to generate different initial fabrics. Drained tests were conducted on these specimens under pure principal stress axis rotation while keeping the principal stress components constant. The factors that may influence the deformation characteristics of sand, such as deviatoric stress q, coefficient of intermediate principal stress b, and mean principal stress p, were also taken into consideration in the tests. Test results show that the developments of three normal strain components with number of cycles are very different between DD and MT specimens, which is also closely related to the factors of q, b, and p. It is seen that DD specimen tends to generate larger contractive volumetric strains than MT specimen, which is more significant when q and b increase or p decreases. The shear stiffness of DD specimen is greater than that of MT specimen. The shear modulus ratio, G_j/G₁, increases with the increase of q and b or the decrease of p, which is more prominent in DD specimen than in MT specimen. It is also shown that DD specimen appears to exhibit stronger non-coaxiality than MT specimen, in which such difference of non-coaxiality tends to decrease with the increase in number of cycles.

文献中报道的大量实验室测试证明，不同的沙质初始织物可能会对施加的载荷产生截然不同的响应。在这项研究中，干法沉积（DD）和湿法夯实（MT）方法都被用来制备砂样以产生不同的初始织物。在保持主应力分量不变的情况下，在纯主应力轴旋转下对这些样品进行了排水试验。可能影响砂土变形特性的因素，例如偏应力q，中间主应力系数b和平均主应力p在测试中也考虑了。测试结果表明，DD和MT样品中三个正应变分量随循环次数的变化差异很大，这也与q，b和p因子密切相关。可以看出，DD样品比MT样品倾向于产生更大的收缩体积应变，当q和b增加或p减小时，收缩应变更显着。DD试样的剪切刚度大于MT试样。剪切模量比G _j / G ₁随q和b的增加而增加或p的降低，在DD样品中比在MT样品中更明显。还显示出DD样品似乎表现出比MT样品更强的非同轴性，其中随着循环次数的增加，这种非同轴性的差异趋于减小。