Kalpakci, Volkan
Özkan, M. Yener
In this study, a simplified approach to the settlement estimation of piled rafts resting on over-consolidated clay deposits is presented. For this purpose, a series of plane-strain and three-dimensional analyses were performed and their results are compared with the available data in the literature. It was found that the percentage decrease in the total settlements with the addition of piles with respect to the unpiled case is very closely estimated by both the plane-strain and the three-dimensional, simplified, numerical analyses. Using this phenomenon, a simple method of analysis is suggested for the total settlement estimation of the piled raft foundations and design charts are provided for the cases studied (for the specific soil conditions only) throughout this study.


A Laboratory model study on settlement reduction effect of stone columns in soft clay
Sünnetçioğlu, Mehmet Emrah; Ergun, Mehmet Ufuk; Department of Civil Engineering (2012)
An experimental study was conducted in order to examine settlement reduction ratios of footing supported by both floating and end bearing type of stone columns. For the floating types, tests were done with varying column lengths of one and two widths of footing (L=B,2B). Tests were conducted in 200 mm* 200 mm* 200 mm cubic loading tanks. The reinforcement effect was achieved by the installation of four stone columns with 20 mm diameter under 70 mm* 70mm model footing. Parameters such as area replacement rat...
Settlement of piled rafts: a critical review of the case histories and calculation methods
Sağlam, Neslihan; Ergun, Mehmet Ufuk; Department of Civil Engineering (2003)
In this study, settlement analysis of pile groups by hand calculation methods were investigated. Settlement ratio, equivalent pier, and equivalent raft methods were studied. Variations in some of the calculation methods were noted, and some suggestions were given. More than thirty piled raft foundation case histories whose foundation and soil properties known have been found. The settlement of piled foundation in each case was solved by these methods. Results obtained from the calculations following differe...
A sequence stratigraphic approach to the depositional history analysis of the upper eocene sedimentary succession, northwest of the thrace basin, Turkey
Sünnetçioğlu, Mehmet Akif; Altıner, Demir; Department of Geological Engineering (2008)
This study investigates the depositional history of the Late Eocene sedimentary record in the northwest of the Thrace Basin in a sequence stratigraphic approach and estimates the contribution of regional tectonics, basin physiography and eustasy. Late Eocene sedimentary succession was analyzed in two third-order sequences based on two major data sets; seismic reflection and well data sets. Depositional Sequence-1, represented by progradational stacking patterns, comprises the coarse-grained “Hamitabat” turb...
A Nonlinear Site-Amplification Model for the Next Pan-European Ground-Motion Prediction Equations
Sandikkaya, M. Abdullah; Akkar, Dede Sinan; Bard, Pierre-Yves (Seismological Society of America (SSA), 2013-02-01)
A site-amplification model for shallow crustal regions that considers both linear and nonlinear soil effects is proposed. The original functional form of the model was developed by Walling et al. (2008) (WAS08) using stochastic simulations and site-response analysis. The major difference between the proposed model and WAS08 is that our site-amplification expression is entirely based on empirical data. To comply with this objective, a database with the most recent V-S30 information from the pan-European regi...
A comparison of two dimensional and three dimensional finite element analysis for settlement behavior of piled raft foundations
Kaltakcı, Volkan; Özkan, M. Yener; Department of Civil Engineering (2009)
In this study, the settlement behavior of the piled raft foundations resting on overconsolidated clays under uniform loading, is investigated for different pile configurations and load levels. A total of 100 plane strain and three dimensional finite element analyses are carried out and the results of these analyses are compared both with each other and with the results presented by Reul & Randolph (2004). The material parameters used in the analysis are selected mainly referring to the previous studies ci...
Citation Formats
V. Kalpakci and M. Y. Özkan, “A SIMPLIFIED APPROACH TO THE SETTLEMENT ESTIMATION OF PILED RAFTS,” ACTA GEOTECHNICA SLOVENICA, pp. 77–85, 2012, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/54479.