A Numerical Study of Load Distribution of Pile Group Foundation by 2D Model
Keywords:
Numerical analysis, pile group, finite element, load distributionAbstract
Studies about pile group foundation have been rapidly increasing in number over the past years. However, past research works focused on pile settlement with consideration of a purely vertical load for pile groups or pile raft foundations. There were few studies with an emphasis on pile load distribution of pile group foundations together with a combined vertical load and a large overturning moment. For example, the foundation of a wind turbine carries a large overturning moment and vertical forces at the base of the structure. This paper presents a numerical study of load distribution of pile group foundations. A 2D numerical model using finite element software, PLAXIS 2D, has been employed to analyze the behavior of the pile group foundation. In the scope of analysis, pile group foundation consisting of large numbers of regular grid piles with a cross section of the strip of the pile row can be analyzed with a 2D model. For structural modeling, each pile is modeled as the embedded pile row. Modeling of pile group foundation is achieved by creation of a small gap between the plate element of the pile cap and the underlying soil, while the pile cap is rigidly connected with a small vertical plate segment which is hinged at the top of the embedded pile row. Several parametric studies, including numbers of piles, overturning moment ratios, stiffness of pile cap, and pile spacing, are also presented in this paper.
Downloads
Metrics
References
JE Bowles. Foundation Analysis and Design. McGraw-Hill, Singapore, 1988.
RBJ Brinkgreve. Plaxis 2D 2012 Manual. A.A. Balkema Publishers, Netherlands, 2012.
D Choudhury, RF Shen and CF Leung. Centrifuge Model Study of Pile Group Subject to Adjacent Excavation. GeoCongress, Louisiana, United States, 2008, p. 141-8.
EM Comodromos, CT Anagnostopoulos and MK Georgiadis. Assessment of axial pile group response based on load test. Comput. Geotech. 2003; 30, 505-15.
EM Comodromos, MC Papadopoulou and IK Rentzeperis. Pile foundation analysis and design using experimental data and 3-D numerical analysis. Comput. Geotech. 2009; 36, 819-36.
HK Engin, EG Septanika and RBJ Brinkgreve. Estimation of pile group behavior using embedded piles. In: Proceeding of the 12th International Conference of International Association for Computer Methods and Advances in Geomechanics, Goa, India, 2008, p. 3231-8.
FE-Analysis of Piled and Piled Raft Foundations, Available: http://kb.plaxis.nl/sites/kb.plaxis.nl/ files/kbpublications/tschuchnigg_lebeau_validation_emb_pile.pdf, accessed July 2015.
A Mandolini, G Russo and C Viggiani. Pile foundations: Experimental investigations, analysis and design. In: Proceeding of the 16th International Conference on Soil Mechanics and Geotechnical Engineering, Osaka, Japan, 2005, p. 177-213.
J Sluis. Validation of Embedded Pile Row in Plaxis 2D, Available: http://kb.plaxis.com/publications/validation-and-application-embedded-pile-row-feature-plaxis-2d, accessed October 2015.
J Ninić, J Stascheit and G Meschke. Beam-solid contact formulation for finite element analysis of pile-soil interaction with arbitrary discretization. Int. J. Numer. Anal. Meth. Geomech. 2014; 38, 1453-76.
P Das and V Mehrmann. Numerical solution of singularly perturbed convection-diffusion-reaction problems with two small parameters. BIT Numer. Math. 2016; 56, 51-76.
P Das. Comparison of a priori and a posteriori meshes for singularly perturbed nonlinear parameterized problems. J. Comput. Appl. Math. 2015; 290, 16-25.
P Das and S Natesan. Richardson extrapolation method for singularly perturbed convection-diffusion problems on adaptively generated mesh. Comput. Model. Eng. Sci. 2013; 90, 463-85.
I Mortie. 2014, Numerical Analysis of Slope Stability Reinforced by Piles in Over-Consolidated Clay. Master Dissertation. Ghent University, Belgium.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2015 Walailak Journal of Science and Technology (WJST)
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.