Field performance of expansive shale formation

Abstract EN

Surface and subsurface heave of shale formation have been monitored in an experimental field station.

The field measurements include variations in soil suction using thernlocouple psychrometers as well as the changes in moisture by means of a nuclear depth probe.

Swell oedometer tests and suction measurements, in addition to soil characterization constitute the laboratory testing program.

Comparison of measured heave with the predicted volume change using the oedometer and suction techniques indicates that the two methods overestimate the actual behavior.-