Multiscale Laboratory Study and Numerical Analysis of Water-Weakening Effect on Shale
Joint Authors
Li, Zhen
Liu, Shangge
Ren, Wentao
Fang, Jinjin
Zhu, Qinghua
Dun, Zhilin
Source
Advances in Materials Science and Engineering
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-14, 14 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-05-11
Country of Publication
Egypt
No. of Pages
14
Abstract EN
Water-weakening effect is one of the most important factors inducing large deformation and stability problems of shale strata in the Huangjiazhai Tunnel.
The influence of water on shale with various water contents and its mechanism still needs more study.
In this paper, the X-ray diffraction and water absorption test were first conducted to determine the influence of mineral components on water-rock interaction.
Then, a series of rock mechanical tests, including uniaxial compressive test, Brazilian disk test, and triaxial compressive test, were carried out on shale under dried condition, wetted condition with various water contents, and saturated condition.
For the uniaxial compression, tension, and triaxial compression, the softening coefficient could reach 0.38, 0.63, and 0.52, respectively.
Based on the macroscale experiments, a numerical case study of tunnel excavation was investigated to evaluate the water effect.
Finally, with the aid of scanning electron microscope and failure morphology, the mechanism of water-weakening effect on shale was discussed from microscopic and macroscopic perspectives.
The thickness of the double layer increases with the increase of water immersion time.
This paper provides a set of useful data for reference in construction in shale strata, and a methodology to evaluate water-weakening effect through laboratory and numerical modelling approaches.
American Psychological Association (APA)
Li, Zhen& Liu, Shangge& Ren, Wentao& Fang, Jinjin& Zhu, Qinghua& Dun, Zhilin. 2020. Multiscale Laboratory Study and Numerical Analysis of Water-Weakening Effect on Shale. Advances in Materials Science and Engineering،Vol. 2020, no. 2020, pp.1-14.
https://search.emarefa.net/detail/BIM-1128565
Modern Language Association (MLA)
Li, Zhen…[et al.]. Multiscale Laboratory Study and Numerical Analysis of Water-Weakening Effect on Shale. Advances in Materials Science and Engineering No. 2020 (2020), pp.1-14.
https://search.emarefa.net/detail/BIM-1128565
American Medical Association (AMA)
Li, Zhen& Liu, Shangge& Ren, Wentao& Fang, Jinjin& Zhu, Qinghua& Dun, Zhilin. Multiscale Laboratory Study and Numerical Analysis of Water-Weakening Effect on Shale. Advances in Materials Science and Engineering. 2020. Vol. 2020, no. 2020, pp.1-14.
https://search.emarefa.net/detail/BIM-1128565
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1128565