Abstract:Using geotextile tubes to construct dikes for land reclamation has been a widely used technique. The tubes are usually filled with slurry of soils, such as sand, silt or clay. Consolidation is a very important step during the use of geotextile which is filled with a saturated soil water mixture. Because of the low elastic modulus of soil water mixture, it can only be used when the elastic modulus increases during the consolidation until it reaches the numerical value used for the deformation model. In the existing methods for calculating geometry of the tube, the loss of water caused by self-weight and loading is not taken into account .So the formulations can solely be seen as approximations and should be applied only for simple design tasks. Using the finite element method, models were created to get deeper knowledge about the tubes during consolidation. In this paper, with the computer program ABAQUS, a fluid-solid coupling numerical simulation is applied to calculate the geometry and the pore pressures within the tube. The results can be used in the following study of the load model.