UFC 3-220-01N
15 AUGUST 2005
CHAPTER 7
SLOPE STABILITY ANALYSIS
7-1
INTRODUCTION
7-1.1
Purpose. The criteria presented in this UFC are to be used by the
engineer to develop dimensions and details for existing or new slopes, and for
predicting their safety and reliability.
7-1.2
Scope. Apply criteria to all projects for the military services. The methods
to analyze the stability and reliability, dimensions, and safety of natural slopes and
constructed earth embankments are present in the references cited. Slope failures can
be rapid and progressive when overstressed by external loads or a reduction of shear
strength of the soil material within the slope. The factor of safety is simply the ratio of
the force resisting failure to the sum of the forces causing rupture along the defined slip
surface. The criteria give the engineer methods of determining these forces.
7-1.3
Related Criteria. See Chapter 4, "Shallow Foundations", and Chapter 8,
"Excavation, Fill, Backfill, and Soil Stabilization for Structures" for additional criteria that
may apply to slope stability.
7-1.4
References. These present the load factor and safety factor methods of
design.
UFC 3-220-10N,
Engineering Manual for Settlement Studies
Engineering Manual for Slope Stability Studies.
Shear Strength Correlation for Geotechnical Engineering
7-1.5
Secondary References
2000 International Building Code (IBC 2000)
Chapter 18, http://www.icbo.org/
Fundamentals of Geotechnical Engineering
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