Physical and numerical modelling of pile foundations subjected to vertical and horizontal loading in dry sand


Unsever Y. S. , ÖZKAN M. Y. , Matsumoto T., Shimono S., Esashi K.

Computer Methods and Recent Advances in Geomechanics, Kyoto, Japan, 22 - 25 September 2014, pp.963-968 identifier

  • Publication Type: Conference Paper / Full Text
  • City: Kyoto
  • Country: Japan
  • Page Numbers: pp.963-968

Abstract

Vertical load test and cyclic horizontal load test on a 3-pile piled raft model were carried out in dry sand model ground at 1-g field to investigate vertical and horizontal bearing mechanisms of the piled raft model. Load tests on the raft and single pile were also carried out separately to investigate their interactions on the piled raft. Numerical modelling of the load tests were carried out, aiming at obtaining more insight into the behaviour of the piled raft subjected to vertical and horizontal loading. A FEM software, PLAXIS 3D, was used for this purpose. The hardening soil model was employed for modelling the sand behaviour. The soil parameters were estimated from a series of consolidated drained triaxial tests of the sand. It is shown from the load tests that the behaviour of the piled raft is not mere summation of the components, but is largely influenced by the interaction of the components as well as the level of the applied load.