Dynamic stability evaluation of rock slope blocks considering vibration degradation effect of structural plane

被引：0
|
作者：
Gao B. [1 ]
Liu S. [1 ]
Ren J. [1 ]
Cai Z. [2 ]
Zhang J. [1 ]
Zhang L. [3 ]
机构：
[1] Xi'an University of Science and Technology, Xi'an
[2] Northwest Hydropower Engineering Co., Ltd., Powerchina, Xi'an
[3] Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing
来源：
Tumu Gongcheng Xuebao/China Civil Engineering Journal | 2024年 / 57卷 / 01期
关键词：
coordinate projection; dynamic stability evaluation; instability criterion; rock slope blocks; vibration degradation of structural plane;
D O I：
10.15951/j.tmgexb.22090909
中图分类号：
学科分类号：
摘要：
To evaluate dynamic stability of rock slope block under seismic action, the seismic degradation effect of the structural plane is studied based on the numerical cyclic shear test of the structural plane, in order to establish the mathematical model of seismic degradation of the structural plane. Based on the principle of coordinate projection, the calculation method of dynamic stability coefficient of rock block considering the degradation effect of structural plane strength vibration is proposed. By adopting the numerical analysis method, the influences of seismic wave fluctuation characteristics on the stability of rock slope blocks are studied, and furthermore the mutation criterion of displacement dynamic response amplification coefficient is proposed based on the mutation theory. Finally, an evaluation system for the dynamic stability of rock blocks is established by combining the time-history curve of the block dynamic stability coefficient with the displacement dynamic response amplification coefficient, so that the block dynamic stability evaluation method under seismic action can be extended. The research results show that the seismic degradation effect of the structural plane is affected by the cyclic shear amplitude, shear cycles, and relative motion velocity, and it is also closely related to the undulation angle. The accuracy of the calculation method of the block dynamic stability coefficient considering the seismic degradation of the structural plane is verified by the study case. The proposed evaluation system is safe and reliable , which shall be beneficial to the development of the block dynamic stability theory as well as the prevention and control of slope geological disasters. © 2024 Editorial Office of China Civil Engineering Journal. All rights reserved.
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页码：97 / 110
页数：13
相关论文
共 23 条
  • [1] Zhao Wanxi, Principle of discrete element method and its application in rock mechanics and engineering, Chinese Journal of Rock Mechanics and Engineering, 5, 2, pp. 165-172, (1986)
  • [2] Shi G H, Goodman R E., Two dimensional discontinuous deformation analysis, International Journal for Numerical and Analytical Methods in Geomechanics, 9, 6, pp. 541-556, (1985)
  • [3] Shahami M H, Bafghi A Y, Marji M F., Investigating the effect of external forces on the displacement accuracy of discontinuous deformation analysis ( DDA ) method [J], Computers and Geotechnics, 111, pp. 313-323, (2019)
  • [4] Zhang Qihua, Hu Huihua, Zhang Yu, Et al., Comparison of traditional and whole-space stereographic projections in block stability analysis [J], Chinese Journal of Geotechnical Engineering, 44, 6, pp. 1148-1155, (2022)
  • [5] Wang Junjie, Feng Deng, Chai He-jun, Et al., Dominant discontinuities based on stereographic projection and K-means clustering algorithm, Chinese Journal of Geotechnical Engineering, 40, 1, pp. 74-81, (2018)
  • [6] Gao B L, Li L, Chen L C, Et al., Visual research and determination of structural plane and free face of rock slopes, Environmental Earth Sciences, 80, 2, (2021)
  • [7] YangZhifa, Gao Bingli, Zhang Luqing, Et al., Computer description of structural planes and blocks based on coordination projection diagram and its application, Chinese Journal of Rock Mechanics and Engineering, 25, 12, pp. 2392-2398, (2006)
  • [8] Gao Bingli, Li Duo, Li Lang, Et al., Stability analysis and visualization of rock slope blocks based on coordinate projection method, Rock and Soil Mechanics, 43, 1, pp. 181-194, (2022)
  • [9] Gao B L, Li D, Li L, Et al., Analysis and visualization of blocks stability in rock slope based on UAV technology: a case study of Shenxianju [J], Episodes, 45, 4, pp. 391-402, (2022)
  • [10] Zhang Juming, Wang Sijing, 3-D dynamic analysis of rock sliding on the layered rock slope, Journal of Engineering Geology, 2, 3, pp. 1-12, (1994)
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