Piled Raft Foundations for Tall Structures – At a Glance

O. Eswara Reddy*, S. B. Mohammed Aejas**, R. Bharath***
* Professor, Department of Civil Engineering, Sree Vidyanikethan Engineering College (Autonomous), Tirupati, India.
**-*** UG Student, Department of Civil Engineering, Sree Vidyanikethan Engineering College (Autonomous), Tirupati, India.
Periodicity:March - May'2017
DOI : https://doi.org/10.26634/jce.7.2.13427

Abstract

In the modern society of technology, construction of tall structures has been increased all over the world. Stability of the tall structure depends mainly upon the type of foundation. Combined piled raft foundation has been used throughout the world for several years to support tall structures as it has the advantages of both shallow foundation and deep foundation. Piled raft foundation is considered most economical. In this foundation system, the structural loads are carried partly by the raft and partly by the piles. This type of foundation system is considered as more effective because the raft is able to provide a reasonable measurement of both stiffness and load resistance. The method involves limit state design approach for designing a piled raft foundation for tall structures and requires three analyses like serviceability of the structure, overall stability of the structure, and analysis for obtaining foundation loads, moments, and shear forces for designing the foundation system. The concept of combined piled raft foundation usage is that it should be able to resist applied axial load with an appropriate factor of safety and at working load, the settlements of combined foundation should be limited. In case of poor soil conditions, grouting is done at the bottom of the pile which increases the bearing capacity of the soil, reduces the settlements and improves the properties of the soil. This paper describes the design principles of foundation, the approach for limit state design method, finite element method, and the concept of soil-structure interaction. Application of piled raft foundation system is explained with the help of a case study. It is opined that the piled raft foundation system can be effectively adopted for construction of tall structures.

Keywords

Finite Element Method, Limit State Design, Overall Stability, Piled Raft Foundation System, Serviceability, Stiffness, Tall Structures

How to Cite this Article?

Reddy, E.O., Aejas, M.S.B., and Bharath, R. (2017). Piled Raft Foundations for Tall Structures – At a Glance. i-manager’s Journal on Civil Engineering, 7(2), 41-52. https://doi.org/10.26634/jce.7.2.13427

References

[1]. L. Zeevaert, (1957). “Foundation design and behavior of Tower Latino Americana in Mexico City”. Geotechnique, Vol. 7, No. 3, pp. 115 – 133.
[2]. R. Butterfield and P.K. Banerjee, (1971). “The elastic analysis of compressible piles and pile groups”. Geotechnique, Vol. 21, No. 1, pp. 43-60.
[3]. E.H. Davis and H.G Poulos, (1972). “The analysis of piled raft systems”. Aust. Geomechs. J., Vol. 2, No. 1, pp. 21-27.
[4]. J.A. Hooper, (1973). “Observations on the behavior of a piled raft foundation in London clay”. Proceedings of Institution of Civil Engineers, Vol. 55, No. 4, pp. 855-877.
[5]. J.B. Burland, B.B. Broms and V.F.B. de Mello, (1977). th “Behaviour of foundations and structures”, Proc. 9 ICSMFE, Tokyo, pp. 495-546.
[6]. M.F. Randolph, (1983). “Design of piled foundations”. Cambridge Univ. Eng. Dept., Res. Rep. Soils TR143.
[7]. H. Sommer, P. Wittmann, and P. Ripper, (1985). “Piled raft foundation of a tall building in Frankfurt clay”. Proc. 11th ICSMFE, San Francisco, pp. 2253-2257.
[8]. R.W. Cooke, (1986). “Piled raft foundation on stiff clays – a contribution to design philosophy”. Geotechnique, Vol. 36, No. 2, pp. 169-203.
[9]. M. Tomono, M. Kakurai, and T. Yamashita (1987). “Analysis of settlement behavior of piled raft foundation”. Takenaka Technical Research Report.
[10]. H.G. Poulos, (1991). “Analysis of piled strip foundations”. Proc. of the 7th Int. Con. on Computer Methods and Advances in Geomechanics, Vol. 1, pp. 183- 191.
[11]. P. Clancy and M.F. Randolph, (1993). “An Approximate Analysis procedure for Piled Raft Foundations”. Int. Jl. for Numerical and Analytical Methods in Geomechanics, Vol. 17, No. 12, pp. 849-869.
[12]. M.F. Randolph, (1994). “Design methods for pile groups and piled rafts”. S.O.A. Report, 13 ICSMFE, pp. 61- 82.
[13]. K. Horikoshi and M.F. Randolph, (1996). “Centrifuge modeling of piled raft foundation on clay”. Geotechnique, Vol. 46, No. 2, pp. 741-752.
[14]. L.D. Ta, and J.C. Small, (1997). “An approximation for analysis of raft and piled raft foundations”. Computers and Geotechnics, Vol. 20, No. 2, pp.105-123.
[15]. J.A. Hemsley, (2000). “Design application of raft foundation”. Thomas Telford Publishing, Vol. 16, pp. 425- 468.
[16]. H.G. Poulos, (2001). “Piled raft foundations – Design and applications”. Geotechnique, Vol. 51, No. 2, pp. 95- 113.
[17]. J.C. Small and H.H. Zhang, (2002). “Behavior of piled raft foundation under lateral and vertical loading”. The International Journal of Geomechanics, Vol. 2, No. 1, pp. 29 -85.
[18]. P. Kitiyodom and T. Matsumoto, (2003). “A simplified analysis method for piled raft foundation in non homogeneous soils”. Int. J. for Numerical and Analytical Methods in Geomechanics, Vol. 27, No. 2, pp. 85-109.
[19]. F.Y. Liang, L.Z. Chen, and X.G. Shi, (2003). “Numerical analysis of composite piled raft with cushion subjected to vertical load”. Computers and Geotechnics, Vol. 30, No. 6, pp. 443–453.
[20]. R. Katzenbach, (2005). “Optimised design of high-rise building foundations in settlement-sensitive soils”. Proc. of International Geotechnical Conference of Soil-Structure Interaction, St. Petersburg, Vol. 1, pp. 39-46.
[21]. J.L. Novak, L.C. Reese, and S.T. Wang, (2005). “Analysis of piled raft foundation with 3D finite element method”. Structures, Congress 2005:Metropolis and Beyond, pp. 1-12.
[22]. D.G. Lin and Z.Y. Feng, (2006). “A numerical study of piled raft foundations”. Journal of the Chinese Institute of Engineers, Vol. 29, No. 6, pp. 1091–1097.
[23]. J.C. Small, H.G. Poulos, (2007). “Non-linear analysis of piled raft foundations”, Contemporary Issues in Deep Foundations, pp. 1-9.
[24]. Y. El-Mossallamy, B. Lutz, and R. Duerrwang, (2009). “Special aspects related to the behavior of piled raft foundation”. 17th International Conference on Soil Mechanics & Geotechnical Engineering ICSMGE, Alexandri, Egypt, pp. 5-9,
[25]. J.H. Lee, Y. Kim, and S. Jeong, (2010). “Threedimensional analysis of bearing behavior of piled raft on soft clay”. Computers and Geotechnics, Vol. 37, No. 1, pp. 103 -114.
[26]. H.G. Poulos, J.C. Small and H. Chow, (2011). “Piled Raft Foundations for Tall Buildings”. Geotechnical Engineering Journal of the SEAGS & AGSSEA, Vol. 42, pp. 78.
[27]. M. Huang, F. Liang, and J. Jiang, (2011). “A simplified non linear analysis method for piled raft foundation in layered soils under vertical loading”. Computers and Geotechnics, Vol. 38, No. 7, pp. 875 - 882.
[28]. E. Bourgeois, P. Buhan, and G. Hassen, (2012). “Settlement analysis of piled-raft foundations by means of a multi phase model accounting for soil-pile interactions”. Computers and Geotechnics, Vol. 46, pp. 26-38.
[29]. D.D.C. Nguyen, S.B. Jo, and D.S. Kim, (2013). “Design method of piled-raft foundations under vertical load considering interaction effects”. Computers and Geotechnics, Vol. 47, pp. 16-27.
[30]. Alireza Roshan and Issa Shooshpasha, (2014). “Numerical analysis of piled raft foundations in soft clay”. EJGE, Vol.19, pp. 4541-4554.
[31]. C. Lodha Mayur and S. Talikoti Rajasekhar, (2015). “Settlement Analysis of Piled Raft by Finite Element Analysis”. International Journal of Research and Science & Technology, Vol. 4, No. 3, pp. 127-133.
[32]. M. Ashutosh kumar, M. Deepankar choudary, and Rolf Katzenbach, (2016). “Effect of earthquake on combined piled raft foundation”. International Journal of Geomechanics, Vol. 16, No. 5.
[33]. H.G. Poulos, J.C. Small, and H. Chow, (2011). “Piled raft foundations for tall buildings”. Geotechnical Engineering Journal of the SEAGS & AGSSEA, Vol. 42, No. 2, pp. 78-84.
[34]. H.G. Poulos, (1999). “The design of piles with particular reference to the Australian Piling Code”. Australian Geomechanics, Vol. 34, No. 4, pp. 25-39.
[35]. F. Badelow, S. Kim, H.G. Poulos, and A. Abdelrazaq (2009). “Foundation design for a tall tower in a reclamation area”. Proc. 7th Int. Conf. Tall Buildings, Research Publishing, pp. 815-823.
[36]. H.G. Poulos, J.C. Small, and H. Chow, (2011). “Piled raft foundations for tall buildings”. Coffey Geotechnics, Australia.
[37]. Katzenbach, R., Schmitt, A., and Turek, J. (2005). “Assessing Settlement of High-Rise Structures by 3D Simulations”. Computer-Aided Civil and Infrastructure Engineering, Vol. 20, No. 3, pp. 221-229.
[38]. L. Zhang and A.M.Y Ng, (2006). “Limiting tolerable settlement and angular distortion for building foundations”, Probabilistic Applications in Geotechnical Engineering, pp. 1-11.
[39]. E. Franke, B. Lutz, and Y. EL-Mossallamy, (1994). “Measurements and numerical modelling of high-rise building foundations on Frankfurt clay”. In Vertical and Horizontal Deformations of Foundations and Embarkments, ASCE, pp. 1325-1336.
[40]. L.D. Ta and J.C. Small, (1996). “Analysis of piled raft systems in layered soils”. Int. J. Numer and Analytical Methods in Geomech., Vol. 20, No. 1, pp. 57-72.
[41]. El-Mossallamy, Y. and Franke, E., (1997). “Piled Raftsnumerical Modeling to Simulate the Behavior of Pile Raft Foundations”. ARCADIS, Trisehla & Partner.
[42]. Reul, O. and Randolph, M.F., (2003). “Piled rafts in overconsolidated clay: Comparison of in situ measurements and numerical analyses”. Geotechniques, Vol. 53, No. 3, pp. 301-315.
[43]. Zienkiewicz and Cheung, (1967). “The Finite Element Method in Structural and Continuum Mechanics”. Numerical Solution of Problems in Structural and Continuum Mechanics, Vol. 1, McGraw-Hill.
[44]. Oliver Reul, (2004). “Numerical study of the bearing behavior of piled rafts”. International Journal of Geomechanical Engineering, Vol. 4, No. 2, pp. 59-68.
[45]. J.C. Small and H.G. Poulos, (2007). “A method of analysis of piled rafts”. Proc. 10th Australia New Zealand Conf. on Geomechanics, Brisbane, pp. 550-555.
[46]. G.M. Zhuang, I.K. Lee, (1994). “An elastic analysis of load distribution for raft–pile systems”. Finite Elements in Analysis and Design, Vol. 18, No. 1, pp. 259–72.
[47]. J. Novak Lisa, C. Reese Lymon, and Shin-Tower Wang, (2005). “Analysis of Pile-Raft Foundations with 3D Finite- Element Method”. Structures Congress 2005: Metropolis and Beyond, pp. 1-12.
[48]. Advanced Multi-Physics Simulation (AMPS) (2004). 3 Dimensional General-Purpose Finite Element Software, AMPS Technologies Company.
[49]. H. Sommer, P. Wittmann, and P. Ripper, (1985). “Piled raft foundation of a tall building in Frankfurt clay”. Proceedings of 11th ICSMFE, Vol. 4.
[50]. E. Franke, (1991). “Measurements beneath Piled Rafts”. Colloque International, Paris, pp. 1-28.
[51]. D.G. Lin, and Z.Y. Feng, (2006). “A numerical study of piled raft foundations”. Journal of the Chinese Institute of Engineers, Vol. 29, No. 6, pp. 1091–1097.
[52]. F. Badelow, S. Kim, H.G. Poulos, and A. Abdelrazaq (2009). “Foundation design for a tall tower in a reclamation area”. Proc. 7th Int. Conf. Tall Buildings, Research Publishing, pp. 815-823.
[53]. L.D. Ta, J.C. Small, (1996). “Analysis of piled raft systems in layered soils”. Int J Numer Anal Methods Geomech, Vol. 20, No. 1, pp. 57–72.
[54]. Coffey, CLAP (Combined Load Analysis of Piles) (2007). User's Manual. Coffey Geotechnics, Sydney, Australia,.
[55]. K. Horikoshi and M.F. Randolph, (1999). “Estimation of overall settlement of piled rafts”. Soils and Founds, Vol. 39, No. 2, pp. 59–68.
[56]. M. Huang, F. Liang, and Jiang, (2011). “A simplified nonlinear analysis method for piled raft foundation in layered soils under vertical loading”. Computers and Geotechnics, Vol. 38, No. 7, pp. 875–882.
[57]. D.D.C. Nguyen, S.B. Jo, and D.S. Kim, (2013). “Design method of piled-raft foundations under vertical load considering interaction effects”. Computers and Geotechnics, Vol. 47, pp. 16–27.
[58]. M.F. Randolph and C.P. Wroth, (1978). “Analysis of deformation of vertically loaded piles”. J. Geot. Eng. Div., Vol. 104, pp.1465-1488.
[59]. K. Horikoshi, T. Matsumoto, Y. Hashizume, T. Watanabe and H. Fukuyama, (2003). “Performance of piled raft foundations subjected to static horizontal loads”. International Journal of Physical Modelling in Geotechnics, Vol. 3, No. 2, pp. 37-50.
[60]. H.G. Poulos, (1994). “Settlement prediction for driven piles and pile groups”. Spec. Tech. Pub. 40, ASCE, Vol. 2, pp. 1629-1649.
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