where st is the settlement at any given time t, ft or m, and sc is the primary consolidation settlement
(ft or m) calculated from Eqs. 8.11, 8.12, 8.13, or 8.14.
The purpose of the Terzaghi theory of consolidation is to estimate the settlement versus time relationship
after loading of the cohesive soil. The amount of settlement, in terms of the average degree
of consolidation settlement Uavg, is related to the time factor T as follows