Study on Slope Stability Evaluation Methods under Seismic Load

Abstract:

Slope dynamic factor of safety (FOS) under earthquake was calculated based on time history analysis method and compared with acceleration time history to analyze correspondence between them. In view of the fact that earthquake is a dynamic process, this paper proposed that three respects can be considered to analyze the slope stability rather than adopting a single FOS value. Firstly, the variation trend of the FOS time history can be combined with the forces on key points to analyze slope stability. Secondly, the displacement and stress vector fields can be adopted to evaluate the final slope stability. Thirdly, the variation trend of the displacement and velocity time history can be used as well. The above methods are applied to Beihoushan landslide in Hanyuan in Wenchuan earthquake to evaluate slope stability under earthquake and the analysis shows that the slope is stable as a whole.

• Periodical: Advanced Materials Research (Volumes 1065-1069)
• Pages: 1508-1512
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1065-1069.1508
• Online since: December 2014
• Authors: Ni Men*, You Wei Sun
• Keywords: Factor of Safety, Stability Analysis, Variation Trend, Wenchuan Earthquake

References

[1] Jianhai Zhang，Jingwei Fan，Jiangda He (1999), Dynamic safety evaluation of slopes or dam foundation using rigid body spring element method, Chinese Journal of Rock Mechanics and Engineering, 18(4)：387-391. (in Chinese).

[2] Boyan Zhang，Houqun Chen，Xiuli Du, et al (2000), Arch dam abutment aseismatic stability analysis, Journal of Hydraulic Engineering, 31(11)：55-59. (in Chinese).

[3] Jingshan Bo，Guodong Xu，Liping Jing (2001), Seismic response and dynamic stability analysis of soil slopes, Earthquake Engineering and Engineering Vibration(Chinese Version), 21(2): 116-120. (in Chinese).

[4] Jianming Zhao，Ning Chen，Yaping Chang (2002), Stability analysis of dam slope under earthquake, Theory and practice on environmental geotechnics, Shanghai: Tongji University Press: 239-248. (in Chinese).

[5] Hanlong Liu, Kang Fei, Yufeng Gao (2003), Time history analysis method of slope seismic stability, Rock and Soil Mechanics, 24(4): 553-560. (in Chinese).

[6] Jingshan Bo (2004), Report of seismic safety evaluation of Daduhe Bridge along No. 108 national railway, Harbin: Institute of Engineering Mechanics, China Earthquake Administration. (in Chinese).

[7] Kuhlemeyer R L, Lysmer J (1999), Finite element method accuracy for wave propagation problems, J Soil Mech & Foundations Div ASCE, 99(SM5), 421~427(May).

DOI: 10.1061/jsfeaq.0001885

[8] Ping Li, Jingshan Bo, Wenhao Qi et al. (2012), Effects of soil structure on abnormal intensity in Hanyuan old town, Acta Seismologica Sinica, 34(6): 851-857. (in Chinese).