Calculate the foundation settlement due to primary compression occurring in a buried clay layer where the following conditions exist: • The groundwater table is very deep. • The thickness of buried...

Calculate the foundation settlement due to primary compression occurring in a buried clay layer where the following conditions exist:

• The groundwater table is very deep.

• The thickness of buried clay layer is 6 ft.

• An 8-ft-thick layer of compact sand overlies the clay layer and extends to the ground surface.

• A deep zone of compact sand underlies the clay layer.

• The unit weight of the compact sand is 135 pcf, and the unit weight for the clay is 100 pcf.

• The foundation size and loading causes a stress increase of 700 psf at the center of the clay layer.

• Laboratory testing of the clay indicates the clay is normally consolidated, the soil void ratio is 1.28, and the compression index is 0.33.