Effects of principal stress rotation on small strain stiffness of sand subjected to piping erosion
Effects of principal stress rotation on small strain stiffness of sand subjected to piping erosion
复制标题
主应力旋转对管道侵蚀砂土小应变刚度的影响
DOI：
10.1016/j.sandf.2017.08.008
复制
发表时间：
2017-10
影响因子：
3.7
通讯作者：
Reiko Kuwano
中科院分区：
文献类型：
--
作者：
Yang Yang;Reiko Kuwano
沿着实验技术和数值模拟的发展，对内烧蚀过程及其失效机理的认识显著增加。尽管取得了这些进展，很少有人注意到土壤侵蚀后，其主要特点是显着的各向异性织物代表的侵蚀面的不连续性。为了研究侵蚀土壤的小应变刚度，提出了一种通过溶解土壤样品中的葡萄糖来产生管涌形式的局部扰动的方法。在空心圆柱扭剪仪上对确定了冲蚀面的试件进行了一系列的试验。对于完整的和侵蚀的标本，弹性剪切模量进行了评估，在各种应力状态下的间隙传感器的帮助下，小幅度扭转循环载荷。在保持平均有效应力sp ′和应力比σ′1/σ′ 3不变的情况下，通过改变主应力轴，考察了G的应力方向依赖性。根据结果，显着减少的剪切模量引起管涌侵蚀后，和刚度的侵蚀土壤被发现是敏感的应力方向的变化，由于所得的各向异性织物涉及的损失颗粒间的接触和重排的砂粒。
Along with the development of experimental techniques and numerical simulations, knowledge of the mechanism of the internal erosion process and the resulting failures has increased remarkably. Despite such advancements, little attention has been paid to the soil after erosion, whose dominant characteristic is the significant anisotropic fabric represented by discontinuities in the erosion planes. In this research, in order to investigate the small strain stiffness of eroded soil, a proposal for generating the local disturbance in the form of piping was achieved by dissolving pre-placed glucose in soil samples. A series of experiments on specimens with determined eroded planes was conducted in a hollow cylindrical torsional shear apparatus. For both the intact and the eroded specimens, the elastic shear modulus was evaluated at various stress states with the help of gap sensors under small-amplitude torsional cyclic loadings. The stress directional dependency ofGwas examined by changing the principal stress axes while keeping mean effective stressp′ and stress ratioσ′1/σ′3constant. According to the results, a marked reduction in the shear modulus was induced after piping erosion, and the stiffness of the eroded soil was found to be sensitive to changes in the stress directions due to the resultant anisotropic fabric involving the loss of inter-particle contacts and the rearrangement of sand particles.
登录
查看更多内容
DOI：
10.1016/0148-9062(76)90851-2
发表时间：
1976
影响因子：
3.9
作者：
J. L. Sherard;Edgar F. Steele;R. S. Decker;L. P. Dunnigan
通讯作者：
J. L. Sherard;Edgar F. Steele;R. S. Decker;L. P. Dunnigan
DOI：
--
发表时间：
2012-09
期刊：
--
影响因子：
--
作者：
Indiketiya Hewage;S. Renuka
通讯作者：
Indiketiya Hewage;S. Renuka
影响因子：
3.2
作者：
T. Uchida;K. Kosugi;T. Mizuyama
通讯作者：
T. Uchida;K. Kosugi;T. Mizuyama
影响因子：
3.7
作者：
S. Goto;F. Tatsuoka;S. Shibuya;Youseong Kim;Takeshi Sato
通讯作者：
S. Goto;F. Tatsuoka;S. Shibuya;Youseong Kim;Takeshi Sato
影响因子：
1.6
作者：
S. Chaudhary;J. Kuwano;Y. Hayano
通讯作者：
S. Chaudhary;J. Kuwano;Y. Hayano