geotech (version 1.0.2)

sigmaX: Horizontal Stress at a Point (Lateral Earth Pressure)

Description

Calculates the horizontal stress at a point. 1 October 2015

Usage

sigmaX(
  gamma,
  thk = NA,
  depth = NA,
  zw,
  zout,
  K,
  gammaW = NA,
  metric,
  upper = TRUE
)

Value

A three-element list containing: sigmaX.eff = effective horizontal stress, sigmaX.total = total horizontal stress, and u = pore water pressure

Arguments

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

K

= vector of lateral earth pressure coefficients

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)

upper

= logical variable to specify whether the upper (TRUE) or lower (FALSE) lateral earth pressure coefficient should be used, for the special case that zout corresponds to a layer interface

Author

Kyle Elmy and Jim Kaklamanos

Examples

sigmaX(gamma = c(108, 116), depth = c(15, 40), zout = 18, K = c(0.34, 0.32),
zw = 15, metric = FALSE, upper = TRUE)