ABSTRACT
The shape of the failure surface as assumed by Janbu is similar to that given in Fig. 15.6(b). Janbu's equation for N*q is
N; =[tan (b+ ~1 + tan 2 (bre2(11tanp where VI= angle as shown in Fig. 15.6(b). This angle varies from 600 in soft compressible soil to 1050 in dense sand. The values for N*c used by Janbu are the same as those given by Vesic (Eq. 15.23). Table" 15.1 gives the bearing capacity factors of Janbu.
