UTexas4 is a computer software application for computing the stability of earth and earth-rock slopes and embankments. UTEXAS4 has been written and is maintained by Dr. Stephen G. Wright of Shinoak Software, who is well-recognized as one of the leading experts in solving problems in soil strength and slope stability (Duncan and Wright, 2005).
UTexas4 has been considered one of the most sophisticated commercial software available to study the stability of slopes using a two-dimensional, limit-equilibrium method. The program has been widely used by the US Army Corps of Engineers and US Federal Highway Administration.
UTexas4 features unique random techniques for generation of potential failure surfaces for subsequent determination of the most critical surfaces and their corresponding factors of safety. The factor of safety is defined with respect to shear strength, i.e. the factor of safety is the ratio of the soil shear strength to the equilibrium shear stress. Values of the factor of safety at or less than unity are considered to represent instability and failure of the slope.
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