slopeStability: Slope Stability

Description Usage Arguments Details Note Author(s) References

Description

These functions are used to determine the factor of safety against shear failure on slopes using infinite slope analyses (FSinf) or planar failure analyses (FSplanar).

Usage

1
2
FSinf(c, phi, gamma, gammaW = NA, alpha, D, zw, metric)
FSplanar(c, phi, alpha, L, W, u)

Arguments

c

soil cohesion

phi

soil friction angle (degrees)

gamma

soil unit weight

gammaW

unit weight of water (default = 62.4 pcf for English units; 9.81 kN/m^3 for metric units)

alpha

slope angle (angle of failure plane) for infinite slope analysis; angle of failure plane for planar failure analysis (deg)

D

depth to failure plane

zw

distance of groundwater table above failure plane (use 0 for a dry slope and D for a submerged slope with parallel seepage)

metric

logical variable: TRUE (for metric units: kN/m^3) or FALSE (for English units: pcf) [this is needed if gammaW is unspecified]

L

length of failure plane (planar failure analysis)

W

weight of slope per unit width (planar failure analysis)

u

average pressure head on the failure plane (planar failure analysis)

Details

Note

See a geotechnical engineering textbook such as Coduto et al. (2011) for more background on slope stability theory.

Author(s)

James Kaklamanos <kaklamanosj@merrimack.edu> and Kyle Elmy <ElmyK@merrimack.edu>

References

Coduto, D.P., Yeung, M.R., and Kitch, W.A. (2011). Geotechnical Engineering: Principles and Practices, Second Edition. Pearson: Upper Saddle River, N.J.


geotech documentation built on May 29, 2017, 11:52 a.m.

Search within the geotech package
Search all R packages, documentation and source code