In embankment dams design
In embankment dams design, the clay core zone may have either vertical or inclined geometry depending upon condition of the proposed site. Mostly vertical clay core is used commonly in embankment dam design and is arranged along dam axis symmetrically. In vertical clay core configuration, the core zone has a relatively small effect on the slope stability of embankment as this zone is located deep inside the dam. Besides, seepage loss at the contact of core and foundation is expected to be less due to the nature of existing high contact pressure at this location (CMI-Arm corps of engineers, 1986).