Stability Analysis of Backfilled Gravel Subgrade Slope with FEM Strength Reduction

Abstract:

The current study was implemented to evaluate the backfilled gravel subgrade slope stability of a highway, China. Typical crossing section in Jiling Province was evaluated by using the finite element based strength reduction method. The calculation code was developed based on BCF, which was programmed for 2D finite element analysis on soil stress-strain analysis. The Duncan-Chang nonlinear constitutive model was employed to describe the stress and strain relationship of the soils. The safety factor calculated by the strength reduction method was compared with traditional limit equilibrium slice Bishop Method.

• Periodical: Advanced Materials Research (Volumes 243-249)
• Pages: 2852-2857
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.243-249.2852
• Online since: May 2011
• Authors: Kun Yong Zhang, Tu Gen Feng
• Keywords: Backfilled Gravel Subgrade Slope, Finite Element Model (FEM), Stability Analysis, Strength Reduction

References

[1] Duncan J (1996). "State of the art: limit equilibrium and finite element analysis of slopes," J Geotech Geoenviron Eng ASCE, Vol 122, No 7, p.578–584

[2] Griffiths D V and Lane P A . "Slope Stability Analysis by Finite Elements. Geotechnique", 1999, 49(3): 387-403

[3] Dawson E M, Roth W H and Drescher A. "Slope Stability Analysis by Strength Reduction". Geotechnique, 1999, 49(6): 835-840.

DOI: 10.1680/geot.1999.49.6.835

[4] Kim J, Salgado R, Yu H (1999). "Limit analysis of soil slopes subjected to pore-water pressures," J Geotech Geoenviron Eng ASCE, Vol 125, No 1, p.49–58

DOI: 10.1061/(asce)1090-0241(1999)125:1(49)

[5] Duncan. J. M, Chang C. Y, (1970). "Nonlinear analysis of stress and strain in soils," Journal of Soil Mechanics and Foundation Division, ASCE, Vol 96, No SM5, pp.1629-1653.

DOI: 10.1061/jsfeaq.0001458

[6] Clough R, Woodward R (1967). "Analysis of embankment stresses and Deformations," J Soil Mech Found Div ASCE, Vol 4, p.529–549.

DOI: 10.1061/jsfeaq.0001005

[7] Kulhawy, F. H, Duncan J. M, (1972). "Stresses and movements in Oroville Dam," Journal of Soil Mechanics and Foundation Division, ASCE, Vol 98, No SM7, p.653–665.

DOI: 10.1061/jsfeaq.0001759

[8] Lane P, Griffiths D (2000). "Assessment of stability of slopes under drawdown conditions," J Geotech Geoenviron Eng ASCE Vol 126 No 5, p.443–450

DOI: 10.1061/(asce)1090-0241(2000)126:5(443)

[9] Zhang Y.S., Wang. H.C. (2004). "Numerical Simulation of the Stability of High Sand Loess Slopes," Journal of Geomechanics, Vol 10 No 4, pp.357-364

[10] Kim J, Salgado R, Lee J (2002). "Stability analysis of complex soil slopes using limit analysis," J Geotech Geoenviron Eng ASCE Vol 128 No 7, p.546–557

DOI: 10.1061/(asce)1090-0241(2002)128:7(546)

[11] Dawson E M, Roth W H and Drescher A.(1999). "Slope Stability Analysis by Strength Reduction". Geotechnique, Vol 49 No 6, pp.835-840

DOI: 10.1680/geot.1999.49.6.835

[12] Bishop W (1955). "The use of the slip circle in the stability analysis of Slopes," Geotechnique, Vol 5, No 1, p.7–17.

[13] Morgenstern R, Price V (1965). "The analysis of the stability of general slip surfaces". Geotechnique, Vol 15, No 1, p.79–93