4. Laboratory testing. Especially for soft rock, such as weakly cemented sedimentary rock,
undisturbed specimens of the material can be obtained from Shelby tube samplers. The specimens
could then be set-up in an oedometer apparatus and the vertical stress versus vertical stain curve can
be obtained (i.e., similar to Fig. 7.12). Several specimens of rock would be obtained at various depths
and the settlement calculations would be identical to the procedure as outlined in Sec. 7.3.5.