Vol. 1 No. 1 (2024): International Geotechnical Innovation Conference
Articles

Micropiled Post-Tensioned Raft Foundation System as a Sustainable, Innovative and Cost- Effective Solution: Case Studies in Saudi Arabia and the GCC Region

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  • Hamzah M. B. Al-Hashemi

Published 2024-10-28

Keywords

  • Micropiles,
  • CMPRF,
  • InSAR,
  • Remote sensing,
  • Salt dome,
  • seismic,
  • Ground improvement,
  • FEA,
  • 3D,
  • Plaxis
    • ...More
    Less

How to Cite

Micropiled Post-Tensioned Raft Foundation System as a Sustainable, Innovative and Cost- Effective Solution: Case Studies in Saudi Arabia and the GCC Region. (2024). 1st International Geotechnical Innovation Conference, 1(1). https://doi.org/10.54878/6wextm19

Abstract

Micropiles, initially conceived for underpinning and strengthening existing structures, have evolved into foundational elements for the construction of new superstructures and substructures. Although micropiles possess a lower load-bearing capacity relative to conventional piles, thereby elevating the cost-to-force ratio, the advent of the Combined Micropiled Raft Foundation (CMPRF) system offers a synergistic approach where the load is distributed between the micropiles and the raft foundation. This integration enhances structural efficiency and cost-effectiveness. Particularly in the Gulf Cooperation Council (GCC) regions, including coastal areas like Jizan on the Red Sea and Bahrain on the Arabian Gulf, the deployment of such foundational systems remains largely novel. Given this context, a detailed examination of the foundation’s behavior under various stress conditions—including static, dynamic, and seismic influences—is imperative to ensure structural integrity and optimal performance. This paper presents two pioneering case studies within the GCC: the AMAS project, which features the world’s largest micropiled post-tensioned raft foundations in Bahrain, and a significant warehouse foundation project in Jizan. These case studies highlight the employment of advanced methodologies and technologies such as Interferometric Synthetic Aperture Radar (InSAR) remote sensing, on-site monitoring, three-dimensional Finite Element Analysis (FEA), performance- based design, coupled soil-structure interaction (SSI) analysis, and the integration of automation, Artificial Intelligence (AI), and Machine Learning (ML). Results from these projects indicate successful implementation with a marked reduction in carbon footprint by over 75% and significant cost savings, underscoring the CMPRF system’s viability and effectiveness.

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References

  1. Aalami B. Post-Tensioning in Ground-Supported Slabs. PTI Journal 2015:5–16.
  2. Alnuaim AM, El Naggar MH, El Naggar H. Numerical investigation of the performance of micropiled rafts in sand. Comput Geotech 2016;77:91–105. https://doi.org/10.1016/j.compgeo.2016.04.002.
  3. Borthakur N, Das M. Modelling the capacity of micropiled-raft foundation rested on soft clayey soil using an artificial neural network approach. International Journal of Geotechnical Engineering 2021. https://doi.org/10.1080/19386362.2021.1959138
  4. Cadden A, Gómez J, Bruce D, Armour T. Micropiles: Recent Advances and Future Trends. Current Practices and Future Trends in Deep Foundations, Reston, VA: American Society of Civil Engineers; 2004, p. 140–65. https://doi.org/10.1061/40743(142)9.
  5. Chanda D, Saha R, Haldar S, Choudhury D. State-of-the-art review on responses of combined piled raft foundation subjected to seismic loads using static and dynamic approaches. Soil Dynamics and Earthquake Engineering 2023;169:107869. https://doi.org/10.1016/j.soildyn.2023.107869.
  6. Elsawwaf A, Nazir A, Azzam W. Assessment of micropiled rafts performance under pure lateral loading. Journal of Engineering Research 2022. https://doi.org/10.21608/erjeng.2022.132756.1058.
  7. Hamzah M. B. Al-Hashemi. On the Use of the Micropiled Post-Tensioned Raft Foundation System in GCC Coastal Areas. DFI 2021 Middle East Online Conference, 2021.
  8. Han J, Ye S-L. A field study on the behavior of a foundation underpinned by micropiles. Canadian Geotechnical Journal 2006. https://doi.org/10.1139/t05-087.
  9. Hwang T-H, Kim K-H, Shin J-H. Effective installation of micropiles to enhance bearing capacity of micropiled raft. Soils and Foundations 2017;57:36–49. https://doi.org/10.1016/j.sandf.2017.01.003.
  10. Kempfert H-G, Böhm F. Raft foundation on floating micropiles in soft soils. Institute of Geotechnics and Geohydraulics, University of Kassel, Germany 2006:1–8.
  11. Patil G, Choudhury D, Mondal A. Estimation of the response of piled raft using nonlinear soil and interface model. International Journal of Geotechnical Engineering 2022;16:540–57. https://doi.org/10.1080/19386362.2020.1859250
  12. Souza FA de. Design of Post-Tensioned Raft and Piled Raft Foundation in the Amazon Region. 2014.
  13. Wang C-C, Han J-T, Kim S. A field study on the load sharing behavior of a micropiled-raft underpinned by a waveform micropile. Canadian Geotechnical Journal 2021. https://doi.org/10.1139/cgj-2020-0547.

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