Analysis for the Stability of Irregular Wedge on Slope and its Engineering Application

Abstract:

Energy dissipation equation is obtained from the virtual work principle. By assuming different initiative sliding directions, methods of upper bound solution and classical solution for rock wedge stability are deduced. The computational formulas of safety factor indicate that the safety factor of wedge is depended on the areas of sliding surfaces and the volume of the wedge rather than the shape of the slope when the attitude and strength of discontinuities is given. Therefore the current wedge method can be improved to overcome the weakness that the current method is inapplicable when the slope shape is greatly rugged and the wedge is surrounded by more than three discontinuities. As an example, the improved method is applied in the left bank slope of Baihetan hydropower station. The calculation results obtained by the improved methods is more reasonable and credible.

• Periodical: Applied Mechanics and Materials (Volumes 94-96)
• Pages: 686-691
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.94-96.686
• Online since: September 2011
• Authors: Guan Rong, Bo Tao Zhang, Xiao Jiang Wang
• Keywords: 3-D Limit Equilibrium, Slope Stability, Strength Reduction Method, Wedge

References

[1] E.HOEK J.W.BRAY: Rock Slope Engineering, Spon Press, London (1981)

[2] JZ Pan: Stability analysis of building and landslide, in Chinese, Hydraulic Press, Beijing (1980)

[3] Zuyu CHEN: Rock stability analysis, in Chinese, China Water Power Press, Beijing (2005)

[4] Qinghui Jiang, Xiaomei Wang, Dingxiang Feng: Chinese Journal of Rock Mechanics and Engineering, in Chinese, vol. 22 (2003), p.1121

[5] East China Investigation and Design Institute under CHECC: The engineering geological report of Baihetan hydropower station at Jinsha river, in Chinese, unpublished