To verify the consolidation settlement calculated by ELPLA, the final consolidation settlement of a clay layer under a rectangular raft calculated by Graig (1978) (Example 7.2, page 186) is compared with that obtained by ELPLA.

A building is supported on a raft 45 [m] * 30 [m] is considered. The contact pressure is assumed to be uniformly distributed and equal to q = 125 [kN/m²]. The soil profile is as shown in Figure 6. The coefficient of volume change for the clay is mv = 0.35 [m /MN].

 It is required to determine the final settlement under the center of the raft due to consolidation of the clay.