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January 1981
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13 Reads
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3 Citations
Factor-of-safety contours are drawn for homogeneous earth embankments for two contrasting situations: no phreatic surface and a phreatic surface that assumes 10 percent freeboard. The curves provide a quick first approximation of the ''most stable'' and ''least stable'' condition of the embankment. 11 refs.
January 1981
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12 Reads
The authors have a conviction that some measure of the variability of the factor of safety should be used - ranging from something relatively simple, such as the coefficient of variation, to the probability of failure approach. It is not yet established whether three-dimensional modeling should replace the current two-dimensional slip-circle modeling. However, a designer with doubts about an embankment's safety would be advised to use the three-dimensional modeling. The Bureau of Mines has available for distribution a computer program which outputs the usual factor of safety (Fellenius, Bishop) plus the standard deviation of the factor of safety using first-order approximations. 11 refs.
January 1981
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6 Reads
The authors have a conviction that some measure of the variability of the factor of safety should be used - ranging from something relatively simple, such as the coefficient of variation, to the probability of failure approach. It is not yet established whether three-dimensional modeling should replace the current two-dimensional slip-circle modeling. However, a designer with doubts about an embankment's safety would be advised to use the three-dimensional modeling. The Bureau of Mines has available for distribution a computer program which outputs the usual factor of safety (Fellenius, Bishop) plus the standard deviation of the factor of safety using first-order approximations.
January 1981
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1 Read
Factor-of-safety contours are drawn for homogeneous earth embankments for two contrasting situations: no phreatic surface and a phreatic surface that assumes 10 percent freeboard. The curves provide a quick first approximation of the ″most stable″ and ″least stable″ condition of the embankment.
... Each failure mode has its own set of sequential data input fields. The hydrologic failure mode considers the following factors: The embankment slope failure potential is determined based on limit equilibrium stability charts provided in Tesarik & McWilliams (1981) and Hoek & Bray (1977). The charts use dam material properties, water levels, and slope geometry to determine the factor of safety of the embankment. ...
January 1981
