Papers by Salim Kouloughli
MATEC web of conferences, 2018
Stabilizing precarious slopes by installing piles has become a widespread technique for landslide... more Stabilizing precarious slopes by installing piles has become a widespread technique for landslides prevention. The design of slope-stabilizing piles by the finite element method is more accurate comparing to the conventional methods. This accuracy is because of the ability of this method to simulate complex configurations, and to analyze the soil-pile interaction effect. However, engineers prefer to use the simplified analytical techniques to design slope stabilizing piles, this is due to the high computational resources required by the finite element method. Aiming to combine the accuracy of the finite element method with simplicity of the analytical approaches, a hybrid methodology to design slope stabilizing piles was proposed in 2012. It consists of two steps; (1): an analytical estimation of the resisting force needed to stabilize the precarious slope, and (2): a numerical analysis to define the adequate pile configuration that offers the required resisting force. The hybrid method is applicable only for the analysis and the design of stabilizing piles placed in the middle of the slope, however, in certain cases like road constructions, piles are needed to be placed at the toe of the slope. Therefore, in this paper a simplified model for the hybrid method is dimensioned to analyze and design stabilizing piles placed at the toe of a precarious slope. The validation of the simplified model is presented by a comparative analysis with the full coupled finite element model.
Modelling in civil and environmental engineering, 2021
Pile foundations are a well-established means of transferring axial loads applied by a superstruc... more Pile foundations are a well-established means of transferring axial loads applied by a superstructure to rigid soil layers. However, the geometrical characteristics of piles can induce the appearance of the buckling phenomenon when using this type of foundation. Furthermore, buckling is a very important factor in the design of piles, especially when the upper layers are loose or weak soil. Pile buckling is currently one of the more complicated geotechnical problems that engineers and researchers have to deal with. The aim of this work is to analyze the effects of some geometrical, mechanical or geotechnical parameters into the value of critical buckling load of an axially loaded pile totally embedded in a homogeneous soil. In this study, numerical buckling analysis is investigated by using three dimensional finite element analysis. The buckling load was studied for concrete pile. while the modulus of soil reaction is adopted constantly with depth. The Numerical results of the buckli...
Reinforcing precarious slopes is a very delicate operation, especially when the slope is near an ... more Reinforcing precarious slopes is a very delicate operation, especially when the slope is near an urbanized area. The use of contiguous pile walls can be very effective. This type of reinforcement ensures that soil does not flow between the piles. The present paper represented a numerical investigation regarding the applicability of the hybrid method to analyze and design slope stabilizing contiguous pile walls. Both the coupled and the simplified models were analyzed. It was found that the simplified model gives close results to those given by the fully coupled model with an error of 9.5%. The analyses of pile walls using the hybrid method allow researchers and engineers to perform parametric analyses at a reduced numerical cost compared to the fully coupled numerical analysis.
Reinforcing precarious slopes is a very delicate operation, especially when the slope is near an ... more Reinforcing precarious slopes is a very delicate operation, especially when the slope is near an urbanized area. The use of contiguous pile walls can be very effective. This type of reinforcement ensures that soil does not flow between the piles. The present paper represented a numerical investigation regarding the applicability of the hybrid method to analyze and design slope stabilizing contiguous pile walls. Both the coupled and the simplified models were analyzed. It was found that the simplified model gives close results to those given by the fully coupled model with an error of 9.5%. The analyses of pile walls using the hybrid method allow researchers and engineers to perform parametric analyses at a reduced numerical cost compared to the fully coupled numerical analysis.
INTERNATIONAL JOURNAL OF CIVIL ENGINEERING AND TECHNOLOGY (IJCIET)
Piles have been used effectively in many applications that effect on the one hand the improvement... more Piles have been used effectively in many applications that effect on the one hand the improvement of soil characteristics and increase its bearing capacity and on the other hand reduce settlements especially in the case of foundation reinforcement already existing. However, the geometrical characteristics of piles, namely small diameters and long lengths can induce the appearance of the buckling phenomenon when using this type of foundation. Pile buckling is currently a very important issue for engineers and researchers in the field of soil improvement and foundation reinforcement work. In this study, numerical eigenvalue buckling of fully embedded single pile in a homogeneous soil is investigated by using three dimensional finite element analysis. Numerical results are verified by comparing with published results and show a good correlation
Computers and Geotechnics
Journal of Geoscience and Environment Protection, 2017
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Papers by Salim Kouloughli