Boundary Effect to the Safety Factor of Slope in Geo-Material

Article Preview

Abstract:

Boundary conditions have great impact on the stability of three dimensional geo-material, like slope, which is one of the oldest applications in geotechnical engineering. In order to analyze the impact of boundary condition to factor of safety of slope, the 3D stability analysis was then extended to the “rough-smooth” and “smooth-smooth” boundary. By studying slopes with the same geometric condition and shear strength parameters, the results show that the safety factors obtained from “rough-smooth” boundary are smaller than those got from “rough-smooth” boundary and bigger than those got from “smooth-smooth” boundary. The study also indicates that when the width to height ratio (W/H) of homogeneous symmetric slope satisfies certain condition, the “rough-rough” boundary equals to the “rough-smooth” boundary. The factor of safety and shape of slip surface got from these two kinds of boundary condition are of the same. Study results can give guidance for the real practice.

You might also be interested in these eBooks

Info:

Periodical:

Pages:

84-87

Citation:

Online since:

November 2011

Export:

Price:

Permissions CCC:

Permissions PLS:

Сopyright:

© 2012 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

[1] E.M. Dawson, W.H. Roth and A. Drescher. Slope Stability Analysis by Strength Reduction. Geotechnique, Vol49(1999) 835-840.

DOI: 10.1680/geot.1999.49.6.835

Google Scholar

[2] H. Lin, P. Cao, F.Q. Gong. The directly searching method for potential slip surface and its influential factors based on the critical state of slope. Journal of Central South University, 16(2009)131-135.

DOI: 10.1007/s11771-009-0022-6

Google Scholar

[3] F. Cai and K. Ugai. Numerical analysis of the stability of a slope reinforced with piles. Soils Found, Vol. 40(2000) 73- 84.

DOI: 10.3208/sandf.40.73

Google Scholar

[4] J.C. Jiang, and T. Yamagami. A new back analysis of strength parameters from single slips. Computers and Geotechnics, Vol. 35(2008), pp.286-291.

DOI: 10.1016/j.compgeo.2007.09.004

Google Scholar

[5] D.W. Taylor. Stability of earth slopes. J. Boston Soc. Civ. Eng., Vol. 24(1937), pp.197-246.

Google Scholar