Details
| Original language | English |
|---|---|
| Pages (from-to) | 2611-2625 |
| Number of pages | 15 |
| Journal | Journal of Rock Mechanics and Geotechnical Engineering |
| Volume | 15 |
| Issue number | 10 |
| Early online date | 5 May 2023 |
| Publication status | Published - Oct 2023 |
Abstract
The shear behavior of large-scale weak intercalation shear zones (WISZs) often governs the stability of foundations, rock slopes, and underground structures. However, due to their wide distribution, undulating morphology, complex fabrics, and varying degrees of contact states, characterizing the shear behavior of natural and complex large-scale WISZs precisely is challenging. This study proposes an analytical method to address this issue, based on geological fieldwork and relevant experimental results. The analytical method utilizes the random field theory and Kriging interpolation technique to simplify the spatial uncertainties of the structural and fabric features for WISZs into the spatial correlation and variability of their mechanical parameters. The Kriging conditional random field of the friction angle of WISZs is embedded in the discrete element software 3DEC, enabling activation analysis of WISZ C2 in the underground caverns of the Baihetan hydropower station. The results indicate that the activation scope of WISZ C2 induced by the excavation of underground caverns is approximately 0.5–1 times the main powerhouse span, showing local activation. Furthermore, the overall safety factor of WISZ C2 follows a normal distribution with an average value of 3.697.
Keywords
- Activation analysis, Baihetan hydropower station, Conditional random field, Interlayer shear weakness zone, Kriging interpolation technique
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geotechnical Engineering and Engineering Geology
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Journal of Rock Mechanics and Geotechnical Engineering, Vol. 15, No. 10, 10.2023, p. 2611-2625.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Characterizing large-scale weak interlayer shear zones using conditional random field theory
AU - Han, Gang
AU - Zhang, Chuanqing
AU - Singh, Hemant Kumar
AU - Liu, Rongfei
AU - Chen, Guan
AU - Huang, Shuling
AU - Zhou, Hui
AU - Zhang, Yuting
N1 - Funding Information: The authors acknowledge the financial support from the Key Projects of the Yalong River Joint Fund of the National Natural Science Foundation of China (Grant No. U1865203) and the Innovation Team of Changjiang River Scientific Research Institute (Grant Nos. CKSF2021715/YT and CKSF2023305/YT). We are also grateful for the support and assistance of the engineers of Power China Huadong Engineering Corporation Limited.
PY - 2023/10
Y1 - 2023/10
N2 - The shear behavior of large-scale weak intercalation shear zones (WISZs) often governs the stability of foundations, rock slopes, and underground structures. However, due to their wide distribution, undulating morphology, complex fabrics, and varying degrees of contact states, characterizing the shear behavior of natural and complex large-scale WISZs precisely is challenging. This study proposes an analytical method to address this issue, based on geological fieldwork and relevant experimental results. The analytical method utilizes the random field theory and Kriging interpolation technique to simplify the spatial uncertainties of the structural and fabric features for WISZs into the spatial correlation and variability of their mechanical parameters. The Kriging conditional random field of the friction angle of WISZs is embedded in the discrete element software 3DEC, enabling activation analysis of WISZ C2 in the underground caverns of the Baihetan hydropower station. The results indicate that the activation scope of WISZ C2 induced by the excavation of underground caverns is approximately 0.5–1 times the main powerhouse span, showing local activation. Furthermore, the overall safety factor of WISZ C2 follows a normal distribution with an average value of 3.697.
AB - The shear behavior of large-scale weak intercalation shear zones (WISZs) often governs the stability of foundations, rock slopes, and underground structures. However, due to their wide distribution, undulating morphology, complex fabrics, and varying degrees of contact states, characterizing the shear behavior of natural and complex large-scale WISZs precisely is challenging. This study proposes an analytical method to address this issue, based on geological fieldwork and relevant experimental results. The analytical method utilizes the random field theory and Kriging interpolation technique to simplify the spatial uncertainties of the structural and fabric features for WISZs into the spatial correlation and variability of their mechanical parameters. The Kriging conditional random field of the friction angle of WISZs is embedded in the discrete element software 3DEC, enabling activation analysis of WISZ C2 in the underground caverns of the Baihetan hydropower station. The results indicate that the activation scope of WISZ C2 induced by the excavation of underground caverns is approximately 0.5–1 times the main powerhouse span, showing local activation. Furthermore, the overall safety factor of WISZ C2 follows a normal distribution with an average value of 3.697.
KW - Activation analysis
KW - Baihetan hydropower station
KW - Conditional random field
KW - Interlayer shear weakness zone
KW - Kriging interpolation technique
UR - http://www.scopus.com/inward/record.url?scp=85159610073&partnerID=8YFLogxK
U2 - 10.1016/j.jrmge.2023.02.032
DO - 10.1016/j.jrmge.2023.02.032
M3 - Article
AN - SCOPUS:85159610073
VL - 15
SP - 2611
EP - 2625
JO - Journal of Rock Mechanics and Geotechnical Engineering
JF - Journal of Rock Mechanics and Geotechnical Engineering
SN - 1674-7755
IS - 10
ER -