Journal
CANADIAN GEOTECHNICAL JOURNAL
Volume 58, Issue 5, Pages 619-636Publisher
CANADIAN SCIENCE PUBLISHING
DOI: 10.1139/cgj-2019-0243
Keywords
sand-pile interface; non-displacement piles; constant normal stiffness; total tangential displacement; shear deformation; sliding displacement
Funding
- Global MTM
Ask authors/readers for more resources
This study focuses on the reduction in sand-pile skin friction with initial relative density increment from medium to dense. By simulating the frictional behavior of a sand-pile interface, the study examines the effects of initial relative density of sand, initial normal load, and constant normal stiffness on the magnitude of the pile skin friction. The results indicate that the mobilized shear stress at failure significantly depends on the shear stress state with respect to the inflexion point on the volume change graph.
This study focuses on a particular phenomenon related to the reduction in sand-pile skin friction with initial relative density increment from medium to dense. Frictional behaviour of a sand-pile interface is simulated using a simple shear-type device capable of inducing a constant normal stiffness condition. Sand-pile interface sliding and soil deformation components are distinguished quantitatively. The effects of initial relative density of sand, initial normal load, and constant normal stiffness on the magnitude of the pile skin friction and shear displacement at failure are examined. Results indicate that the magnitude of the mobilized shear stress at failure relies significantly on the shear stress state with respect to the inflexion point on the volume change graph, which is equivalent to the position of the peak stress ratio. Good correlations exist between results of this study and field data of several heavily instrumented piles embedded in dense to very dense sands. The presented procedure is a useful framework for establishing more accurate skin friction calculation methodologies and t-z curve developments of axially loaded piles.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available