Abstract
This paper presents the results of field tests performed to investigate the compressive bearing capacity of pre-bored grouted planted (PGP) pile with enlarged grout base focusing on its base bearing capacity. The bi-directional O-cell load test was conducted to evaluate the behavior of full scale PGP piles. The test results show that the pile head displacements needed to fully mobilize the shaft resistance were 5.9% and 6.4% D (D is pile diameter), respectively, of two test piles, owing to the large elastic shortening of pile shaft. Furthermore, the results demonstrated that the PHC nodular pile base and grout body at the enlarged base could act as a unit in the loading process, and the enlarged grout base could effectively promote the base bearing capacity of PGP pile through increasing the base area. The normalized base resistances (unit base resistance/average cone base resistance) of two test piles were 0.17 and 0.19, respectively, when the base displacement reached 5% Db (Db is pile base diameter). The permeation of grout into the silty sand layer under pile base increased the elastic modulus of silty sand, which could help to decrease pile head displacement under working load.
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References
CABR (China Academy of Building Research) (2014) Technical code for testing of building foundation piles. JGJ 106-2014, China Construction Industry Press, Beijing (in Chinese)
Fleming K, Weltman A, Randolph M, Elson K (2009) Piling engineering, 3rd edn. Taylor & Francis, London
Han J, Ye SL (2006) A field study on the behavior of micropiles in clay under compression or tension. Can Geotech Eng 43(1):19–29
Horiguchi T, Karkee MB (1995) Load tests on bored PHC nodular piles in different ground conditions and the bearing capacity based on simple soil parameters. Proc Tech Rep Jpn Archit Soc 1:89–94
Kon H, Yshida E, Kabasawa K, Komatsu G, Kuwabara F, Kimura M (2010) Investigation of soil cement around nodular piles after pile-toe load test installed by pre-bored piling method. Jpn Geotech J 5(4):615–623 ((in Japanese))
Lee JH, Salgado R (1999) Determination of pile base resistance in sands. J Geotech Geoenviron Eng 125(8):673–683
Mullins G, Winters D, Dapp., S. (2006) Predicting End Bearing Capacity of Post-Grouted Drilled Shaft in Cohesionless Soils. J Geotech Geoenviron Eng 132(4):478–487
O’Neill MW (2001) Side resistance in piles and drilled shafts. J Geotech Geoenviron Eng 127(1):3–16
Randolph MF, Wroth CP (1978) Analysis of deformation of vertically loaded pile. J Geotech Eng Div 104(12):1465–1488
Randolph MF (2003) Science and empiricism in pile foundation design. Geotechnique 53(10):847–875
The Professional Standards Compilation Group of People’s Republic of China (2017) Technical specification for static loading test of self-balanced method of building foundation piles. JGJ/T 403-2017. China Architecture and Building Press, Beijing (in Chinese)
Thiyyakkandi S, McVay M, Bloomquist D, Lai P (2012) Measured and predicted response of a new jetted and grouted precast pile with membranes in cohesionless soils. J Geotech Geoenviron Eng 139(8):1334–1345
Thiyyakkandi S, Mcvay M, Bloomquist D, Lai P (2014) Experimental study, numerical modeling of and axial prediction approach to base grouted drilled shafts in cohesionless soils. Acta Geotech 9(3):439–454
Wan Z, Dai G, Gong W (2019) Field study on post-grouting effects of cast-in-place bored piles in extra-thick fine sand layers. Acta Geotech 14:1357–1377
White DJ, Finlay TCR, Bolton MD, Bearss G (2002) Press-inpiling: ground vibration and noise during pile installation. In: Proceeding of international deep foundations congress, ASCE, Reston, VA, pp 363–371
Yamato S, Karkee MB (2004) Reliability based load transfer characteristics of bored precast piles equipped with grouted bulb in the pile toe region. Soils Found 44(3):57–68
Zhou JJ, Gong XN, Wang KH, Zhang RH, Yan TL (2016) A model test on the behavior of a static drill rooted nodular pile under compression. Mar Georesour Geotechnol 34(3):293–301
Zhou JJ, Gong XN, Wang KH, Zhang RH, Yan JJ (2017) Testing and modeling the behavior of pre-bored grouting planted piles under compression and tension. Acta Geotech 12:1061–1075
Zhou JJ, Gong XN, Zhang RH (2019) Model tests comparing the behavior of pre-bored grouted planted piles and a wished-in-place concrete pile in dense sand. Soils Found 59(1):84–96
Zhou JJ, Gong XN, Zhang RH, El Naggar MH, Wang KH (2020) Field behavior of pre-bored grouted planted nodular pile embedded in deep clayey soil. Acta Geotech 15:1847–1857
Zhou JJ, Yu JL, Gong XN, Yan TL (2020) Field tests on behavior of pre-bored grouted planted pile and bored pile embedded in deep soft clay. Soils Found 60(2):551–561
Zhou JJ, Yu JL, Gong XN, El Naggar MH, Zhang RH (2020) The effect of cemented soil strength on the frictional capacity of precast concrete pile–cemented soil interface. Acta Geotech 15:3271–3282
Acknowledgements
The research described is funded by the Natural Science Foundation of China (Grant No. 51978610). The authors also want to express gratitude to ZCONE High-tech Pile Industry Holdings Co., Ltd. for the financial and technical support with the manufacture and installation of the test PGP piles.
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Zhou, Jj., Yu, Jl., Gong, Xn. et al. Field study on the behavior of pre-bored grouted planted pile with enlarged grout base. Acta Geotech. 16, 3327–3338 (2021). https://doi.org/10.1007/s11440-021-01208-7
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DOI: https://doi.org/10.1007/s11440-021-01208-7