EXPERIMENTAL ANALYSIS OF THE BEHAVIOR OF CAPPING BEAMS ACROSS THE PILES IN LOOSE SAND

Nemanja Bralović, Iva Despotović, Danijel Kukaras

DOI Number
https://doi.org/10.2298/FUACE230630034B
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Abstract


The test program was conducted on 1G models capping beams over the tops of the group of 2x2 piles, the purpose of which was to reduce the settlement of the structure. The test program included six experiments, three of which were conducted on capping beams without piles and three on capping beams across the tops of the piles, with pile distances 3d, 4d and 5d, where d is the pile diameter and the pile length is 40 d. Test results show that the current conventional approach to the design of capping beams across the tops of the piles, where the entire load is entrusted to the piles, is too conservative and irrational. Instead, it is more economical to apply a low bearing capacity factor for piles as settlement reducers and maximize use of raft bearing capacity to carry part of the external load.

Keywords

raft foundation, pile foundation, piled raft foundation, settlement, Eurocode

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References


El-Garhy, A. Abdel, Abdel-FattahYoussef i M. Abo: Behavior of raft on settlement reducing piles: Experimental model study. Journal of Rock Mechanics and Geotechnical, pp. 389-399, 2013.

Burland et al: Behaviour of foundations and structures. Proc. 9th ICSMFE, Tokyo, 1977.

V. Berezantzev: Load Bearing Capacity and Deformation of Piled Foundations. Proceedings of the Fifth International Conference on Soil Mechanics and Foundation Engineering, Paris, France, 17–22 July 1961.

J. Burland: Shaft Friction of Piles in Clay—A Simple Fundamental Approach. London, Ground Engineering, 1973.

Poulos, H.G: Pile Behaviour—Theory and Application. Geotechnique, 39, 365–415, 1989.

Poulos, H.; Small, J.; Chow, H: Piled Raft Foundations for Tall Buildings. Geotech. Eng. J. SEAGS AGSSEA 2011, 42, 78–84, 2011.

Poulos, H.G.; Bunce, G: Foundation Design for the Burj Dubai–TheWorld’s Tallest Building. Proceedings of the 6th International Conference on Case Histories in Geotehnical Engineering, Arlington, VA, USA, 11–16 August 2008.

Chow, H.; Small, J: Behaviour of piled rafts with piles of different lengths and diameters under vertical loading. Austin, TX, USA, 2005.

De Azevedo et al: Effect of the Addition and Processing of Glass Polishing Waste on the Durability of Geopolymeric Mortars. 2021.

Gad, M.A.; Riad, A.M.; Nikbakht, E.; Ali, M.; Ghanem, G.M: Structural Behavior of Slender Reinforced Concrete Columns Wrapped with Fiber Reinforced Polymers Subjected to Eccentric Loads. Proceedings of the 2020 Second International Sustainability and Resilience Conference, Technology and Innovation in Building Designs, Sakheer, Bahrain, pp 1-5, 11–12 November 2020

Muhammad Rehan Hakro et al: Numerical Analysis of Piled-Raft Foundations on Multi-Layer. Buildings, 12, 356, 2022.

Reul O., Randolph M: Design Strategies for Piled Rafts Subjected to Nonuniform Vertical Loading. Journal of Geotechnical and Geoenvironmental Engineering, pp. 1125-1128, 2004.

Phung Duc Long: Piled Raft – A Cost-Effective Foundation Method for High- Rises. Geotechnical Engineering Journal of the SEAGS & AGSSEA, 2010.

Bajad S., Sahu R: An Experimental Study on the Behaviour of Vertically Loaded Piled. International Association for Computer Methods and Advances in Geomechanics, Goa, 2008.

Fleming and Randolph: Piling Engineering,Taylor & Francis Group: New York, NY, USA, p. 95, 2009.

Clancy and Randolph: An Approximate Analysis Procedure for Piled Raft Foundations. International Journal for Numerical and Analytical Methods in Geomechanics, pp. 849-869, 1993.

Zhanabayeva Assel et al: Comparative Analysis of Kazakhstani and European Design Specifications: Raft Foundation, Pile Foundation, and Piled Raft Foundation. Appl. Sci., 11, 3099, 2021.

Burland J., Burbidge M., Wilson E., Terzaghi K: Settlement of Foundations on Sand and Gravel. Proc. Inst. Civ. Eng, 1985.

Ali M. et al: Experimental Validation of Mander’s Model for Low Strength Confined Concrete Under Axial Compression. Proceedings of the 2020 Second International Sustainability and Resilience Conference Technology and Innovation in Building Designs, Sakheer Bahrain, November 2020; pp.1–6.

Mandolini, A., Laora R, Mascarucci Y: Rational Design of Piled Raft. Procedia Eng. 57, 45–52, 2013.

Chu Y.M. et al: Combined Impact of Cattaneo-Christov Double Diffusion and Radiative Heat Flux on Bio-Convective Flow of Maxwell Liquid Configured by a Stretched Nano-Material Surface. Appl. Math. Comput.,419,126883, 2021.

Kavitha P.E., Beena K.S., Narayanan K.P: A review on soil–structure interaction analysis of laterally loaded piles. Innov.Infrastruct.Solut.,1,14, 2016.

Bourgeois E. et al: Settlement Analysis of Piled-Raft Foundations by Means of a Multiphase Model Accounting for Soil-Pile Interactions. Comput. Geotech. 46, 26–38, 2012.

Long Duc P., Bakar A: Settlement analysis for piled raft foundations - A case study. Geotechnics for Sustainable Development, 2013.

Mosa J., Mohammed Y: Experimental observations on the behaviour of a piled raft foundation. Journal of Engineering, pp. 807-828, 2011.


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