ABSTRACT
Probably the most useful chart is that given by Janbu et aI., (1956) as modified by Christian and Carrier (1978) for the case of a constant E
s with respect to depth. The chart (Fig. 13.9) provides
estimates of the average immediate settlement of uniformly loaded, flexible strip, rectangular, square or circular footings on homogeneous isotropic saturated clay. The equation for computing the settlement may be expressed as
(13.22)
In Eq. (13.20), Poisson's ratio is assumed equal to 0.5. The factors)1o and)11 are related to the DflB and HIB ratios of the foundation as shown in Fig. 13.9. Values of )11 are give~ for various LIB ratios. Rigidity and depth factors are required to be applied to Eq. (13.22) as per Eq. (13.21). In Fig. 13.9 the thickness of compressible strata is taken as equal to H below the base of the foundation where a hard stratum is met with.
