A Dynamic Response of Pile Foundation Subjected to Different Frequencies in Sandy Soil

Hanan J. Mohammed; Waad A. Zakaria

doi:10.24237/djes.2024.17112

Authors

Hanan J. Mohammed
hanangmial1223@gmail.com
Department of Civil Engineering, University of Diyala, 32001 Diyala, Iraq
Waad A. Zakaria Department of Civil Engineering, University of Diyala, 32001 Diyala, Iraq

Keywords:

Sandy soil, Model test, Pile foundation, Dynamic load, Vibration

Abstract

This research presents an experimental study of the dynamic response of pile foundation as a result of the vibration of a nearby foundation as a source of dynamic load in sandy soil with relative density of 85%. The experiments were conducted on dry and soaked state of soil. The pile raft consisted of a pile cap with dimensions of (100 x 100 x 10) mm, connected with four solid steel piles with a slenderness ratio of 30 and pile diameter is 8 mm, and the machine foundation (vibration source) with dimensions (80 x 80 x 40) mm. After having completed the soil layers preparation inside a steel container with suitable dimensions is used, the machine that generated vibration was operated by the rotating mass, as this vibration reached the pile raft. The results showed that the displacement amplitude, acceleration, velocity and settlement of the pile raft decreased with increasing distance with the vibration source (from 0.5B to 2B) for the three frequencies (10,15 and 20) Hz, while the decrease for displacement was (48%,23.83% and 42.48%) respectively in the dry state of soil. On the other hand, the decrease for displacement was (37%, 23.16% and 46.27%) in the soaked state of soil. Regarding acceleration, it was decreased to (29.66%, 45.79% and 40.38%) respectively in the dry and (100%, 21.88% and 34.04%) in the soaked state of soil. Furthermore, the velocity reached (45.38%, 42.96% and 38.18%) respectively in the dry and (54.05%, 11% and 28%) in the soaked state of soil, the settlement was (63.82%, 52.1% and 38.18%) respectively.

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References

Mohamed M. Khalil, Asmaa M. Hassan and Hussein H. Elmamlouk, "Dynamic behavior of pile foundations under vertical and lateral vibrations: review of existing codes and manuals", HBRC JOURNAL, VOL. 16, NO. 1, 39–58, 2020. DOI: https://doi.org/10.1080/16874048.2020.1729586

J. E. Bowles, Foundation Analysis and Design.New York: MCGraw- Hill Book Company, 5th edition, 1996.

V. K. Puri and S. Prakash, "Observed and Computed Response of Piles Under Dynamic Loads”, Indian Geotechnical Conference (IGC), Bangalore, India, pp. 302 – 305, 2008.

M. Elkasabgy, M. H. El Naggar and M. Sakr,"Full-scale vertical and horizontal dynamic testing of a double helix screw pile", Canadian Geotechnical Conference, pp. 12-16, 2010.

F. S. Al-Saffar, " Dynamic Behaviour of Machine Foundation Resting on Pile in a Sandy Soil", PH.D. Desertion, Baghdad University, Iraq, 2015.

M. Y. Fattah, M. J. Al-Mosawi, and A. F. Al-Ameri, "Dynamic Response of Saturated Soil - Foundation System Acted Upon by Vibration”, Journal of Earthquake Engineering 21, no. 7 (September 16, 2016): 1158–1188. doi:10.1080/13632469.2016.1210060, 2016. DOI: https://doi.org/10.1080/13632469.2016.1210060

S. Sbartai,"Dynamic Interaction of Two Adjacent Foundations Embedded in a Viscoelastic Soil", International Journal of Structural Stability and Dynamics 16, no. 03, 1450110.doi:10.1142/s0219455414501107, 2016. DOI: https://doi.org/10.1142/S0219455414501107

M. Y. Fattah, B. S. Zbar and F. S. Mustafa, "Vertical vibration capacity of a single pile in dry sand”, Marine Georesources & Geotechnology, 2017. DOI: https://doi.org/10.1080/1064119X.2017.1294219

S. K. Al Ezzi and W. A. Zakaria " Effect of Vibrating Footing on a Nearby Static – Load Footing”, Civil Engineering Journal, Vol. 5, No. 8, 2020.

S. K. Ibrahem and W. A. Zakaria, "Effect of Vibrating Footing on a Nearby Static – Load Footing", Civil engineering journal Vol.5(8): pp. 1738-1752, 2019. DOI: https://doi.org/10.28991/cej-2019-03091367

N. D. Abd, and S. H. Abid Awn, "Effect of dynamic amplitude on response of single pile embedded in collapsible soil", IOP Conference Series. Materials Science and Engineering; Bristol Vol. 1076, Iss. 1, 2021. DOI: https://doi.org/10.1088/1757-899X/1076/1/012109

S. K. Al Ezzi, and W.A. Zakaria, " Dynamic response of a footing adjacent to dynamically loaded footing on gypsums soil”, SN Applied Sciences 2:585, 2020. DOI: https://doi.org/10.1007/s42452-020-2367-2

Ling-Yu Xu, Cheng-Xiang Song, Wei-Yun Chen, Fei Cai, Yong-Yi Li and Guo-Xing Chen, "Liquefaction-induced settlement of the pile group under vertical and horizontal ground motions”, Soil Dynamics and Earthquake Engineering 144 ,106709, 2021. DOI: https://doi.org/10.1016/j.soildyn.2021.106709

A. Mandal and D. K. Baidya, '' The Influence of Rigid Boundary on the Dynamic Response of the Foundation: An Experimental Investigation'', Electronic Journal of Geotechnical Engineering, Vol. 8, Bundle B, 2003.

T. W. Lambe and R. V. Whitman, "SERIES IN SOIL ENGINEERING " 3th edition, JOHN WILEY & SONS, New York, Chichester, Brisbane, Toronto, Singapore, P.228, 1979.

K. W. Abd Al-Kaream, "The Dynamic Behavior of Machine Foundation on Saturated Sand", M.Sc. Thesis, Building and Constructing Department, University of Technology, Iraq, 2013.

A. F. Al-Ameri, "Transient and Steady State Response Analysis of Soil Foundation System Acted upon by Vibration", Ph.D. Thesis, Civil Engineering department, University of Baghdad, Iraq, 2014.

T. Nogami, F. Ren, J. Chen, and A. Mason,"Vertical Vibration of Pile in Vibration-Induced Excess Pore Pressure Field", Journal of Geotechnical Engineering, ASCE, Vol. 123, No. 5, pp. 422-429 ,1997. DOI: https://doi.org/10.1061/(ASCE)1090-0241(1997)123:5(422)

K. Terzaghi and R. B. Peck, "Soil mechanics in engineering practice", Wiley, New York, 1948.