Numerical simulations of horizontal bearing performances of step-tapered piles

• Autorzy: Xiong Liangxiao , Chen Haijun , Xu Zhongyuan , Yang Changheng

Identyfikatory

DOI

10.24425/ace.2021.138042

• Języki publikacji: EN

Abstrakty

EN

In this study, we tried to understand the horizontal bearing performances of step-tapered piles using numerical simulations. The influence of the geometric parameters, e.g. the diameter (D) and the distance (L), and the length (H) of the pile were considered, and the soil distribution imposed on the horizontal bearing capacity of the piles was simulated. Numerical results show that when the other geometrical parameters of step-tapered piles are kept unchanged: (a) the increasing diameter (D) of the enlarged upper part of step-tapered piles improves the horizontal ultimate bearing capacity of step-tapered piles; (b) reduced distance (L) improves the horizontal ultimate bearing capacity of the step-tapered piles; (c) Increasing length (H) of the enlarged upper part of steptapered piles increases the horizontal ultimate bearing capacity; (d) the reduced length (H) decreases the bending moment of the pile body. Higher soil strength surrounding the enlarged upper part of step-tapered piles can increase the horizontal ultimate bearing capacity of step-tapered piles. The change of soil strengths at the end of the step-tapered piles does not influence the horizontal ultimate bearing capacity of step-tapered piles.

Słowa kluczowe

EN

step-tapered pile; horizontal bearing performance; numerical simulation; geometric size; soil distribution

PL

pal schodkowy; nośność pozioma; symulacja numeryczna; rozmiar geometryczny; rozmieszczenie gruntu

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2021
• Tom: Vol. 67, nr 3
• Strony: 43--60
• Opis fizyczny: Bibliogr. 12 poz., il., tab.

Twórcy

autor

Xiong Liangxiao

• School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang, PR China

autor

Chen Haijun

• Geotechnical Engineering Department, Nanjing Hydraulic Research Institute, Nanjing, PR China

autor

Xu Zhongyuan

• Department of Earth Sciences, University of Delaware, United States

autor

Yang Changheng

• School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang, PR China

Bibliografia

• [1] M. Ghazavi, O. Tavasoli, “Characteristics of non-uniform cross-section piles in drivability”, Soil Dynamics and Earthquake Engineering 43: pp. 287-299, 2012.
• [2] A.M. Rybnikov, “Experimental investigations of bearing capacity of bored-cast-in-place tapered piles”, Foundation Engineering 43: pp. 48-52, 1990.
• [3] K.K. Jayantha, D.M. Ian, “Axial response of tapered piles in cohesive frictional ground”, Journal of Geotechnical and Geoenvironmental Engineering 119: pp. 675-693, 1993.
• [4] M. Sakr, M.H. El Naggar, M. Nehdi, “Wave equation analyses of tapered FRP-concrete piles in dense sand”, Soil Dynamics and Earthquake Engineering 27: pp. 166-182, 2007.
• [5] J.H. Lee, K.H. Paik, D.H. Kim, S.H. Hwang, “Estimation of axial load capacity for bored tapered piles using CPT results in sand”, Journal of Geotechnical and Geoenvironmental Engineering 135: pp. 1284-1294, 2009.
• [6] Y.G. Zhan, H. Wang, “Numerical study on load capacity behavior of tapered pile foundations”, Journal of Geotechnical and Geoenvironmental Engineering 17: pp. 1969-1980, 2012.
• [7] G.Q. Kong, H. Zhou, H.L. Liu, X.M. Ding, R. Liang, “A simplified approach for negative skin friction calculation of special-shaped pile considering pile-soil interaction under surcharge”, Journal of Central South University of Technology, 21: pp. 3648-3655, 2014.
• [8] N. Hataf, A. Shafaghat, “Optimizing the bearing capacity of tapered piles in realistic scale using 3D finite element method”, Geotech Geol Eng 33: pp. 1465-1473, 2015.
• [9] F.I. Nabil, “Behavior of step tapered bored piles in sand under static lateral loading”, Journal of Geotechnical and Geoenvironmental Engineering 136: pp. 669-676, 2010.
• [10] Y.R. Lv, H.L. Liu, X.M. Ding, G.Q. Kong, “Field tests on bearing characteristics of x-section pile composite foundation”, Journal of Performance of Constructed Facilities 26: pp. 180-189, 2012.
• [11] L.X. Xiong, H.J. Chen, “A numerical study and simulation of vertical bearing performance of step-tapered pile under vertical and horizontal loads”, Indian Geotech J 50: pp. 383-409, 2020.
• [12] N.F. Ismael, “A behavior of laterally loaded bored piles in cemented sands”, Journal of Geotechnical Engineering 116: pp. 1678-1699, 1990.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).