Evaluation of the Influence of De-sanding (Recycling System) Process on the Pile Bearing Capacity Using Full Scale Models


  • Haider N. Hasan College of Engineering - University of Baghdad
  • A'amal A.H. Al-Saidi College of Engineering - University of Baghdad




Bored Pile, Bentonite, Support Fluid, Bearing Capacity, Recycling System


The present study investigates the effect of the de-sanding (recycling system) on the bearing capacity of the bored piles. Full-scale models were conducted on two groups of piles, the first group was implemented without using this system, and the second group was implemented using the recycling system. All piles were tested by static load test, considering the time factor for which the piles were implemented. The test results indicated a significant and clear difference in the bearing capacity of the piles when using this system. The use of the recycling system led to a significant increase in the bearing capacity of the piles by 50% or more. Thus it was possible to reduce the pile length by (15 % or more) thus, and implementation costs were significantly reduced. Furthermore, casting time for the pile group in which the system is used is less than for the pile group that did not use it (approximately half an hour per pile), and the amount of concrete was greater by an average of 2 cubic meters for each pile.


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Al-Jeznawi D., Ismacahyadi Bagus Mohamed Jais, Bushra S. Albusoda and Norazlan Khalid, 2022. The slenderness ratio effect on the response of closed-end pipe piles in liquefied and non-liquefied soil layers under coupled static-seismic loading, Journal of the Mechanical Behavior of Materials, 31(1), pp. 83–89.

AL-KINANI, A. M., and Ahmed, M. D., 2020. Comparison of Single and Group Bored Piles Settlement Based on Field Test and Theoretical Methods, Journal of Engineering, 26(2), pp. 144–158. DOI: 10.31026/j.eng.2020.02.11.

Al-Mosawe, M., Al-Shakarchi, Y., and Al-Saidi, A., 2006. Influence of defect in the concrete piles using non-destructive testing, Journal of Engineering (3).

Al-Saidi, A. A., Al-Mosawe, M. J., and Al-Shakarchi, Y. A.S., 2021. Behavior of Defective Cast in Place Piles, Journal of Engineering, 27(4), pp. 96–117. DOI: 10.31026/j.eng.2021.04.08.

ASTM 2007. Deep Foundations Under Static Axial Compressive Load, Astm D1143/D1143M-07, D1143/D114(Reapproved 2013), pp. 112–126. Available at: www.astm.org.

ASTM D1143, 2007. ASTM D 1143/D 1143M-07 Standard Test Methods for Deep Foundations Under Static Axial Tensile Load, ASTM International, 07(Reapproved 2013), p. 15.

Bowles, J. E., 1988. Foundation analysis and design.

Buringh, P., 1960. Soils and soil conditions in Iraq, Ministry of Agriculture. Baghdad.

Foundation Manual, 2010. ReVision, (November 2008).

Chandrasekaran, V., Garg, K. G., and Prakash, C., 1978. Behaviour of Isolated Bored Enlarged Base Pile Under Sustained Vertical Loads, Soils and Foundations, 18(2), pp. 1–15, DOI: 10.3208/sandf1972.18.2_1.

Chong, W. L., Le, X., and Rex, S., 2018. Base cleanliness of bored piles revisited–a case study.

Code, U. B., 1997. International building code, International Code Council, USA.

Das, B. M., and Sivakugan, N., 2015. Introduction to geotechnical engineering, Cengage Learning.

Deese, G. G., 2004. Slurry sand content and concrete interaction in drilled shaft construction, pp. 1–106. Available at: http://etd.fcla.edu/SF/SFE0000500/Slurry_Sand_Content_and_Concrete_Interaction_in_Drilled_Shaft_Construction.pdf.

DREGER, M., MARCIN D., MIECZYS£AW P., CEZARY K., MICHA M., LESZEK R., and MARIUSZ W., 2020. Bentonite-loess slurry for construction of diaphragm walls and bored piles, Roads and Bridges - Drogi i Mosty, 19(2), pp. 97–106 DOI: 10.7409/rabdim.020.006.

Federation of Piling Specialists Bentonite Support Fluids in 2006, January.

Fellenius, B. H., 1975. Test loading of piles and new proof testing procedure, Journal of the Geotechnical Engineering Division, 101(9), pp. 855–869.

Lam, C., Jefferis, S. A., and Martin, C. M., 2014. Effects of polymer and bentonite support fluids on concrete-sand interface shear strength, Geotechnique, 64(1), pp. 28–39, DOI: 10.1680/geot.13.P.012.

Lam, C., Jefferis, S. A., and Suckling, T. P., 2018. Treatment of bentonite fluid for excavation into Chalk’, Proceedings of the Institution of Civil Engineers: Geotechnical Engineering, 171(6), pp. 518–529. DOI: 10.1680/jgeen.18.00043.

Meyerhof, G. G., 1981. The bearing capacity of rigid piles and pile groups under inclined loads in clay, Canadian Geotechnical Journal, 18(2), pp. 297–300.

Orozco Herrera, J. E., 2021. Ground Movements and Vibrations Caused by Impact Pile Driving of Prestressed Concrete Piles in Central Florida.

PETE, 2003. Department of Petroleum Engineering, DRILLING ENGINEERING, (April), pp. 12.

Poulos, H. G., 1999. Behaviour of pile groups with defective piles, in International Conference on Soil Mechanics and Foundation Engineering, pp. 871–876.

Tomlinson, M. and Woodward, J., 2007. Pile design and construction practice. CRC Press.

Murthy, 2007. Advanced Foundation Engineering Geotechnical Engineering Series, pp. 795.

How to Cite

“Evaluation of the Influence of De-sanding (Recycling System) Process on the Pile Bearing Capacity Using Full Scale Models” (2022) Journal of Engineering, 28(12), pp. 80–92. doi:10.31026/j.eng.2022.12.06.

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