The factor of safety
calculated using the nonlinear shear strength of a natural expansive soil cutting slope without wet-dry cycles is 2.32, and the maximum vertical sliding depth is 4.38 m.
Slope B Slope angle [beta] 1:3 1:2 1:1 2:1 [k.sub.c] 0.131 0.112 0.076 0.02 [u.sub.x] (cm) Imperial Valley-06 21.84 31.44 44.89 218.88 Kobe 48.51 75.41 118.81 499.22 Parkfield-02 55.29 76.15 120.45 581.24 Figure 6: Validation of the results of the static factor of safety
In term of deterministic analysis, a slope is likely to fail if the factor of safety
is equal or less than one (FS [less than or equal to] 1).
The percentage improvement in cover stability ([P.sub.R]) defined herein as the ratio of long-term factor of safety
of geosynthetic-reinforced cover slope to that of the unreinforced structure may be as high as 150% for the range of seismic events covered in hazard mitigation programs.
(17.)See, e.g., Sieracki, 149 F.2d at 99 (factor of safety
of 1.25 insufficient); Trozma v.
Figure 12 shows the factor of safety
changes over time when the slope angle was varied with the same density of sand.
The estimation of the factor of safety
was applied for each design.
As a result, liquefaction potential is evaluated only by the factor of safety
. In this paper, probabilistic concepts are used in determination of liquefaction potential.
For purposes of analysis, Rudakov and Pursell decided that 500 million cycles--a dozen or more years worth of heartbeats--was an infinite life in determining the factor of safety
against fatigue failure.
Despite the progress of simulation techniques, the use of the factor of safety
(FOS) is still the most commonly adopted method in slope stability analysis.