DefinePK

Abstract

The majority of the skyscraper configurations have immense weight exchanges to the foundations which make the selection of footing type raft unimaginable, particularly when the bearing limit of the associate soil foundation media is not adequate to maintain such expense of the high rise building weight. This research focuses on reviewing the negative skin friction and estimation its value; using the practical, numerically and theoretically approaches. Comparison will be made between Joseph E. Bowles approach and his output with a considered particular case. A numerically investigation was carried out on finite elements modeling (PLAXIS) of a pile subjected to negative skin friction due to the lowering of the groundwater table. The settlement values were calculated in the PLAXIS 3D program where this value was considered as a criterion for calculating the settlement in 2D against which negative friction values were calculated. The results obtained from the PLAXIS 2D program were far from the field reality but with the corrected values of the compression modulus the program results approach the results of the field. The theoretical calculation is used to estimate the value of Negative skin friction, but it should use the suitable method in the computation. In this study, the ß method is discovered as a appropriate method of the calculation for the deep piles in the deep soft soil area.