.... It serves as an early example of theobservationalmethod,before ProfessorPeckcoined the term in1960, and shows how the field records of movements and water levels allowed the cause of the heave to be identified, and led to the use of gravel filled relief wells to bleed off excess groundwater pressures...

...M C MATTHEWS; V S HOPE; C R I CLAYTON; RAYLEIGH GROUND STIFFNESS PROFILES material is brought to failure. Weak rocks display a more linear stress-strain behaviour and hence the loss of stiffness with increasing strain is much less than for most soils. 3. Themeasurement of stiffness using seismic...

... the water wells to monitor for leachate leakage likely environmental effectsof using a particu- during the lifeof the landfill site. lar disused quarryas a waste disposal site. Increasingly in recent years, various geophys- Details of the technique ical techniques which measure either the 4. The Earth s...