External radial stress changes and axial capacity for suction caissons in soft clay

摘要: A series of centrifuge tests was performed on instrumented model caissons in normally consolidated, lightly overconsolidated and sensitive clays, to investigate the external radial stress changes around suction during installation, consolidation pullout, axial capacity after consolidation. Total pressure transducers embedded at different elevations caisson wall showed total stresses that varied almost linearly with depth both penetration extraction caisson, smaller gradients post-consolidation pullout. Only slight differences were found measured when entered suction-affected zone from jacking-affected zone. Comparisons are presented between measurements two theoretical predictions, for effective simple cavity expansion approach give reasonable pr...