2.2 Bearing capacity for footings on layered soils For bases on sand overlying clay or clay overlying sand,first check if the distance H will penetrate into the lower stratum.If H>d1 you might estimate qult as follows:①③ ■ A possible alternative for o-c soils with a number of thin layers is to use average values of c and o in the bearing capacity equations of Table 2.1 obtained as Eq.(c)and (d). A slope-stability program written by Bowles can be used to obtain the bearing capacity for layered soils. 超2.2 Bearing capacity for footings on layered soils ▪ For bases on sand overlying clay or clay overlying sand, first check if the distance H will penetrate into the lower stratum. If H>d1 you might estimate qult as follows: ①～③ ▪ A possible alternative for φ-c soils with a number of thin layers is to use average values of c and φ in the bearing capacity equations of Table 2.1 obtained as Eq. (c) and (d). ▪ A slope-stability program written by Bowles can be used to obtain the bearing capacity for layered soils