Geotechnical Engineering has advanced to the present stage that various types of earth structures can be designed and constructed safely and economically in most instances. However, in some cases, difficulty arises either in the form of failure during construction or after many years in existence. The soils in which these problems occur include but are not limited to highly sensitive clays and stiff fissured clays of various geological origins. These clays possess pronounced macroscopic and microscopic structures that control the strength and deformation properties. Macroscopic structures are visible features that include fissures, joints, stratifications and other discontinuities in an otherwise intact soil mass. Microscopic structures would include soil fabric and cementation bonds. A typical soft clay deposit usually is composed of a weathered crust at the top that is fissured and thus macroscopic structures are dominant and soft clay at depth in which microscopic structures are significant. The properties of these clays are complex, having a stress-strain relationship that exhibits a peak strength and a post peak decrease in strength, a non-linear failure envelope, strength anisotropy and a significant decrease in strength with a slower rate of testing or longer time to failure.