BEHAVIOUR OF ATCHAFALAYA LEVEES DURING CONSTRUCTION

Presently available analytical techniques were used to achieve an understanding of the observed behaviour of Atchafalaya test sections during and shortly after construction and to develop modelling techniques for the evaluation of alternative designs. The characteristic behaviour of the test sections was identified and successfully modelled by finite element stress and deformation analyses and by stability analyses. Measured pore pressures agreed well with those calculated, but pore pressure analyses gave little insight into test section behaviour. Careful analysis of the foundation soil profile was an important factor in the success of the investigation. The usefulness of the methods of analysis was evaluated and different methods of stability analysis compared. Les techniques analytiques disponibles furent utilisees afin de parvenir a une comprehension du comportement reel des essais de sections d'Atchafalaya, pendant et peu apres la construction et de developper des techniques de modelage pour l'evalua...