Analysis of slope stability with dynamic overloading from earthquake

Abstract

The analysis of slope earthquake stability is one of the most important research subjects in geotechnical engineering and earthquake engineering. Two different concepts of slope earthquake stability are put forward: strength reserve stability and dynamic overloading stability. The first concept of slope earthquake stability has been widely accepted, and relative analysis methods are also well developed; the second one, however, is seldom mentioned until now, and the failure criterion and the analysis method based on this concept are yet to be explored. What are researched are just the failure criterion and the analysis method of dynamic overloading earthquake stability. The criterion of critical earthquake peak acceleration for the dynamic overloading stability of a slope and its analysis method, the load increasing method (LIM), are put forward. The dynamic overloading earthquake stability of a loess slope at Changshougou (长寿沟) in Baoji (宝鸡) City, Shaanxi (陕西) Province, China, is analyzed with LIM. The analysis result reveals that the dynamic overloading earthquake stability of the slope is quite high to the action of the earthquake ground motion, with exceeding probability of 10% in the next 50 years.

Keywords

slope / dynamic overloading / earthquake stability / load increasing method / critical earthquake peak acceleration

References

[1] Cornell C. A.. Engineering Seismic Risk Analysis. Bulletin of the Seismological Society of America, 1968, 58(5): 1583-1606.

[2] Dai M. L., Li T. C.. Analysis of Dynamic Stability Safety Evaluation for Complex Rock Slopes by Strength Reduction Numerical Method. Chinese Journal of Rock Mechanics and Engineering, 2007, 26(Suppl.1): 2749-2754.

[3] Hu Y. X., He X.. Phase Angle Consideration in Generating Response Spectrum-Compatible Group Motion. Earthquake Engineering and Engineering Vibration, 1986, 6(2): 37-51.

[4] Huang R. Q., Liu W. H., Zhou J. P., . Experimental Field Study of Movement Characteristics of Rock Blocks Falling down a Slope. Journal of Earth Science, 2010, 21(3): 330-339.

[5] Jiang P., Dai L. S.. Introduction to Engineering Seismology, 1993, Beijing: Seismological Press 84 102

[6] Li H. B., Xiao K. Q., Liu Y. Q.. Factor of Safety Analysis of Bedding Rock Slope under Seismic Load. Chinese Journal of Rock Mechanics and Engineering, 2007, 26(12): 2385-2394.

[7] Li Z. S.. Landslide Stability Analysis under Seismic Ground Motion. Hydrogeology & Engineering Geology, 2004, 2: 4-8.

[8] Liu H. L., Fei K., Gao Y. F.. Time History Analysis Method of Slope Seismic Stability. Rock and Soil Mechanics, 2003, 24(4): 553-557.

[9] Liu J. L., Luan M. T., Zhao S. F., . Discussion on Criteria for Evaluating Stability of Slope in Elastoplastic FEM Based on Shear Strength Reduction Technique. Rock and Soil Mechanics, 2005, 26(8): 1345-1348.

[10] Sun, J. Z., Liu, Y. Q., Zhao, T., et al., 2010. Critical Acceleration Analysis of Slope Earthquake Stability. In: Williams, A. L., Pinches, G. M., Chin, C. Y., et al., eds., Proceedings of the 11th IAEG Congress. Auckland, New Zealand. 3641–3649

[11] Sun J. Z., Tian X. F., Guan X. D., . Stability Analysis for Loosened Rock Slope of Jinyang Grand Buddha in Taiyuan, China. Earth Science Frontiers, 2008, 15(4): 227-238.

[12] Tang H. M., Jia H. B., Hu X. L., . Characteristics of Landslides Induced by the Great Wenchuan Earthquake. Journal of Earth Science, 2010, 21(1): 104-113.

[13] Wei F. Q., Chernomorets S., Aristov K., . A Seismically Triggered Landslide in the Niujuan Valley near the Epicenter of the 2008 Wenchuan Earthquake. Journal of Earth Science, 2010, 21(6): 901-909.

[14] Wu, S. G., Zhang, Y. X., Kang, M., 2006. Application of Surcharge Method in Analysis of Rock Slope Stability. Proceedings of the Second National Academic Conference of Geotechnical Engineering (Volume One), Wuhan. 84–90 (in Chinese)

[15] Zhao F. X., Zhang Y. S.. Artificial Ground Motion Compatible with Specified Peak Velocity and Target Spectrum. Acta Seismologica Sinica, 2006, 28(4): 429-437.

[16] Zheng Y. R., Ye H. L., Huang R. Q.. Analysis and Discussion of Failure Mechanism and Fracture Surface of Slope under Earthquake. Chinese Journal of Rock Mechanics and Engineering, 2009, 28(8): 1714-1723.