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In terms of the importance of constructing mega projects in Egypt with innovated superstructures subjected to very high loads, this research was initiated with the objective of investigating the performance of rock-socketed piles under compression loads, numerically (Plaxis V8.6) for 3 study cases. Primarily, objectives were set and research methodology was put forward to attain such objectives. The methodology encompassed 5 studies (Theoretical, Numerical Modelling, Study Cases Simulation, Analytical Studies, and Inferential Studies).
Theoretical Study of literature in the field of rock-socketed piles was accumulated, studied, scrutinized, and categorized into groups. All through Numerical Modelling Study, theoretical approaches (finite element) were investigated. In addition, modelling of rock-socketed piles was elaborated. During Study Cases Simulations Study, several models were applied to tune their parameters to produce similar results to measured values (calibration process). This was achieved to 3 study cases. Moreover, through this study, models results were verified against measured values, where it was clear that Jointed Rock Model provided results similar to measured values. Accordingly, trials were achieved to adjust its parameters (i.e. Erockmass and φrockmass).
Analytical Study was achieved to the impact of the different parameters on the pile behaviour (i.e, dip angle, socket length, settlement ,and roughness angle), in terms of empirical equations and models for 3 study cases. During the Inferential Study, conclusions were drawn and recommendations for future research and Engineering practice were suggested.
The research prioritized the need of modified reduction factors and the establishments of a practical design for rock-socketed piles, as most of the available methods provide conservative predictions. This design method would assist designers to predict pile actual settlement and estimate the distribution of loads along the rock socketed pile portion, in terms of the parameters of piles (i.e, dip angle- socketed length - diameter ratio (Ls/D)).