Advertisement

Enhancement of Raft Foundation Using Micro Pile Technique

  • Ahmed T. Farid
  • Mostafa A. YousefEmail author
Conference paper
Part of the Sustainable Civil Infrastructures book series (SUCI)

Abstract

Raft foundations are one of the shallow foundation techniques used for carrying high loads of the building especially on compressible soil formations with high differential and total settlements. In this paper, a case study of a high rise building having non-eccentric loads is established using raft foundation. There was compressible soil stratum starting from 8.0 m down to 12.5 m underneath the raft foundation. Due to the non-eccentric loads of the building and the compressible soil layer which caused the increase in the tilting of the building with time. According to the continuous of the building movement, enhancement method should be used to overcome this moving. Micro pile technique was designed and established at the tilting sides of the building. A new raft foundation was added at the top of the old foundation to insure connect of the executed micro piles with the old raft foundation. Measurements of the tilting or the movement of the building were continued before and during execution of the micro pile technique. Observations showed a good enhancement in the behavior of the foundation system after using the new system of micro piles as there was no more tilting in the building or the differential settlements.

Notes

Acknowledgment

The authors would like to thank Prof. Dr. Adel Hammam (Geo-institute) and Eng. Hayel M. El-Naggar for their collaboration and assistance during performing of the present study. Special appreciated to the contractor company staff executing the micro piles for their help and patient.

References

  1. Bowles, J.E.: Foundation Analysis and Design, 5th edn. McGraw-Hill, New York (1996)Google Scholar
  2. Bruce, D.A., Juran, I.: Drilled and Grouted Micropiles; State of Practice Review, FHWA-RD-96-016, Melean, July 1997Google Scholar
  3. Bruce, D.A., Hall, C.H., Triple, R.E.: Structural underpinning by pin piles. In: Proceedings of the 17th Deep Foundation Institute Annual Meeting, New Orleans, pp. 49–78 (1992)Google Scholar
  4. Federal Highway Administration. Micropile Design and Construction, Report No. FHWA-NHI-05-039, United States Department of Transportation, December 2005Google Scholar
  5. FHWA. Micropile Design and Construction Guidelines, Implementation Manual. Publication No. FHWA-SA-97-070 (2000)Google Scholar
  6. Horpibulsuk, S., et al.: Underpinning for distressed building in Northest Thailand. In: 16th International Conference on Case Histories in Geotechnial Engineering, Arlington, VA, Paper No 1.02, pp. 1–9 (2008)Google Scholar
  7. Housing & Building National Research Center. Egyptian Code of Practice for Soil Mechanics and Foundations-Deep Foundations, vol. 4, Cairo, Egypt ( 2005)Google Scholar
  8. Lizzi, F.: Static Restoration of Monuments. Sage Publication, Genoa (1984)Google Scholar
  9. Plumelle, C.: Improvement of the bearing capacity of the soil by inserts of group and reticulated micropiles. In: International Symposium on In-Situ Reinforcement of Soils and Rocks, Paris, 83–89 (1984)Google Scholar
  10. Poulos, H.G., Davis, E.H.: Pile Foundation Analysis and Design. Wiley, New York (1980)Google Scholar
  11. Singh, S., Heine, E.I.: Underpinning existing footings with micro-piles. In: Proceedings of International Conference on Case Histories in Geotechnical Engineering, St. Louis, vol. 3, pp. 1373–1383 (1984)Google Scholar
  12. Stuedlein, A.W., Gibson, M.D., Horvitz, G.E.: Tension and compression micro-pile load tests in gravely sand. In: 16th International Conference on Case Histories in Geotechnial Engineering, Arlington, VA, Paper No 1.12, pp. 1–11 (2008)Google Scholar
  13. Wolosick, J.: Macropile load test. In: International Workshop on Micropiles (IWM) Seattle, WA (2003)Google Scholar

Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  1. 1.Housing and Building National Research Center (HBRC)GizaEgypt

Personalised recommendations