Total stress analysis

This analysis, often called the (¡>u = 0 analysis, is intended to give the stability of an embankment immediately after its construction. At this stage it is assumed that the soil in the embankment has had no time to drain and the strength parameters used in the analysis are the ones representing the undrained strength of the soil (with respect to total stresses), which are found from either the unconlined compression test or an undrained triaxial test without pore pressure measurements.

Consider in Fig. 5.6 the sector of soil cut off by arc AB of radius r. Let W equal the weight of the sector and G the position of its centre of gravity. As (f>a = 0°, shear strength component = cu.

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