stressVertical: Vertical Stress Calculations
In geotech: Geotechnical Engineering

Description Usage Arguments Details Value Author(s) See Also Examples

These functions calculate vertical stress at a point (sigmaZ) and versus depth (sigmaZ.profile)

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sigmaZ(gamma, thk = NA, depth = NA, zw, zout, gammaW = NA, metric)
sigmaZ.profile(gamma, thk = NA, depth = NA, zw, zout = NA,
               gammaW = NA, metric)

`gamma`	vector of unit weights (pcf or kN/m^3)
`thk`	vector of layer thicknesses (ft or m)
`depth`	vector of layer bottom depths (ft or m)
`zw`	depth of groundwater table (ft or m)
`zout`	desired depth of output (ft or m): a single value
`gammaW`	unit weight of water (default = 62.4 pcf for English units; 9.81 kN/m^3 for metric units)
`metric`	logical variable: TRUE (for metric units) or FALSE (for English units)

Either layer thicknesses or depths to layer bottoms must be specified.

Function sigmaZ outputs a three-element list giving the stresses at a specified depth:

sigmaZ.eff = effective vertical stress
sigmaZ.total = total vertical stress
u = pore water pressure

Function sigmaZ.profile outputs a four-element list giving the stress variation with depth (four vectors):

depth = depth
sigmaZ.eff = effective vertical stress
sigmaZ.total = total vertical stress
u = pore water pressure

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

stressHorizontal, stressInducedArea, stressInducedPoint, stressPlot

## Example code for Vertical Stress at a Point
sigmaZ(gamma = c(108, 116), depth = c(15, 40), zout = 18, zw = 15, metric = FALSE)

##  Example code for Vertical Stress Profile
sigmaZ.profile(gamma = c(108, 116), depth = c(15, 40), zw = 15, metric = FALSE)