Principal strain rotation of anisotropic tuff due to continuous water-content variation
Principal strain rotation of anisotropic tuff due to continuous water-content variation
复制标题
含水量连续变化引起的各向异性凝灰岩的主应变旋转
DOI：
10.1016/j.ijrmms.2021.104646
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发表时间：
2021
影响因子：
7.2
通讯作者：
Ogawa Koji
中科院分区：
文献类型：
--
作者：
Togashi Yota;Imano Takanobu;Osada Masahiko;Hosoda Koichi;Ogawa Koji
虽然对沉积岩的干燥变形行为进行评价对隧道施工至关重要，但造成干湿岩石力学特性差异的原因尚不清楚。前人对新近纪各向异性凝灰岩的研究表明，在干、湿状态下，层理方向的刚度与垂直方向的刚度大小相反。虽然这表明了各向异性的主取向旋转，但其机制尚不清楚。如果可以连续详细地获得干燥引起的变形特征，这种现象可以阐明干燥和潮湿条件下的刚度差异。本研究对日本凝灰岩进行了干燥试验，详细研究了含各向同性基质吸力的连续含水率变化对凝灰岩的变形行为。在层理方向和垂直方向取样的2个试样均表现出水分变化引起的各向异性变形。垂直于顺层面方向的正应变占主导地位，并发生剪切应变。此外，首次检测到水分变化引起的主应变旋转。从湿态到干态，最大和最小主应变方向旋转约90°。结果表明，凝灰岩的最硬和最软取向随着含水率的变化而不断交替。
Although it is essential for tunnel construction to evaluate the deformation behavior of sedimentary rock due to drying, the reasons for differences in the mechanical properties between dry and wet rock have not yet been clarified. A previous study on Neogene-period anisotropic tuff states that the magnitude correlation of the stiffness in the bedding orientation and its perpendicular one are reversed in the dry and wet states. Although this indicates the rotation of the principal orientation of the anisotropy, the mechanism is unclear. This phenomenon can clarify the stiffness differences between the dry and wet conditions if the deformation characteristics due to drying can be continuously obtained, in detail. In this study, drying tests on Japanese tuff are conducted, and the deformation behavior due to continuous moisture-content variation involving isotropic matric suction are investigated, in detail. The results of two specimens sampled in the bedding orientation and its perpendicular one show anisotropic deformations due to moisture variation. Normal strain in the orientation perpendicular to the bedding plane is dominant and shear strain occurs. Furthermore, principal strain rotation due to moisture variation is detected for the first time. The maximum and minimum principal strain orientations are rotated by approximately 90° from the wet state to dry state. It is determined that the hardest and softest orientations of tuff continuously alternate due to moisture variation.
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DOI：
10.1016/0148-9062(77)90199-1
发表时间：
1977
期刊：
International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts
影响因子：
--
作者：
D. Allirot;J. Boehler;A. Sawczuk
通讯作者：
A. Sawczuk
DOI：
10.11532/journalte1991.10.101
发表时间：
2000
期刊：
--
影响因子：
--
作者：
Mitsunori Iwata;Yoshinori Fuke;Tomohisa Hagiwara;Atsushi Yokoo
通讯作者：
Atsushi Yokoo
三轴压缩试验中假设横观各向同性弹性岩体的非三轴行为
DOI：
10.3208/jgs.9.479
发表时间：
2014
期刊：
Jiban Kogaku Janaru (japanese Geotechnical Journal)
影响因子：
--
作者：
Y. Togashi;M. Kikumoto;K. Tani
通讯作者：
K. Tani
“嘿？”嵌入广场的主动学习机制
DOI：
--
发表时间：
2016
期刊：
影响因子：
--
作者：
安藤明伸;潟岡冴子,鈴木哲朗,橋渡憲明,佐藤陽,村松浩幸;塩瀬隆之，宮原裕美，長谷川潤，熊谷香菜子，本田ともみ，遠藤幹子
通讯作者：
塩瀬隆之，宮原裕美，長谷川潤，熊谷香菜子，本田ともみ，遠藤幹子