The diagram on the right side of Fig. 6.20 can be used for combined cohesion and friction. These
undrained shear strength parameters are often obtained from triaxial tests, such as the unconsolidated
undrained triaxial compression test (ASTM D 2850-03, 2004) or the consolidated undrained triaxial
compression test (ASTM D 4767-02, 2004, see Fig. 3.36).
The final step would be to divide the passive resistance P
p
by a factor of safety. The factor of
safety should be at least 3