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Journal of Zhejiang University-SCIENCE A

, Volume 20, Issue 11, pp 838–851 | Cite as

Experimental and theoretical studies of laterally loaded single piles in slopes

  • Ming-hui Yang
  • Bo DengEmail author
  • Ming-hua Zhao
Article
  • 34 Downloads

Abstract

In this study, a series of small-scale laboratory model tests and numerical simulations was performed to investigate the lateral behavior of a single pile embedded in slopes and in horizontal ground. In the model tests, small-scale model piles were fitted with strain gauges around their surface at various depths, while the lateral deflections at the pile head were measured by dial gauges. A total of four sets of model pile tests was conducted with piles installed in model slopes of 0°, 30°, 45°, and 60°. The changes in pile head deflections and their bending moments with changes in pile location and the embedded length of the piles were analyzed by the finite element method (FEM). Subsequently, a new p-y curve (p denotes the soil resistance and y denotes the pile deflection) for a steep clay slope was developed based on those finite element analysis results, taking into account the influences of the declination of the slope and the position of the pile in the slope. The numerical results agree very well with those from a scale model pile load test and other full-scale pile load tests reported in the literature.

Keywords

Pile foundation Slope Model test Finite element method (FEM) Lateral load p-y curve 

边坡中单桩横向受力的试验与理论研究

概要

目的:研究边坡段基桩的水平承载特性,以期指导工程 实践。

创新点:提出一种新的p-y 曲线,以考虑边坡坡角和桩在 边坡中位置的影响。

方法:1. 针对平地桩基和坡地桩基两种工况开展两组室 内模型对比试验;2. 采用ABAQUS 建立数值模 型,并研究桩径、桩长和土体的弹性模量对桩基 水平受荷性能的影响;3. 对室内模型试验结果和 数值模拟结果进行对比分析,并得出坡地桩基的 p-y 曲线。

结论:1. 边坡中侧向受力桩的侧向挠度和弯矩沿桩长的 分布与水平埋置桩的分布相似;然而,边坡倾角 对单桩的侧向荷载特性有着重要的影响;在相同 的荷载条件下,较高的倾斜角度会引起较大的桩 身变形和弯矩。2. 对于埋置长度不变的桩,桩的 极限侧向承载力与坡趾距桩截面中心的距离近 似呈双线性关系。3. 对于埋置长度不同的桩,其 极限承载力随坡脚至桩截面中心距离的增加呈 线性增加。

关键词

桩基 边坡 模型试验 有限元 水平荷载 p-y 曲线 

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Notes

References

  1. Bhushan K, Fong PT, Haley SC, 1979. Lateral load tests on drilled piers in stiff clays. Journal of the Geotechnical Engineering Division, 105(8):969–985.Google Scholar
  2. Brandenberg SJ, Boulanger RW, Kutter BL, et al., 2005. Behavior of pile foundations in laterally spreading ground during centrifuge tests. Journal of Geotechnical and Geoenvironmental Engineering, 131(11):1378–1391. https://doi.org/10.1061/(asce)1090-0241(2005)131:11(1378) CrossRefGoogle Scholar
  3. Cai F, Ugai K, 2000. Numerical analysis of the stability of a slope reinforced with piles. Soils Foundations, 40(1):73–84. https://doi.org/10.3208/sandf.40.73 CrossRefGoogle Scholar
  4. Chae KS, Ugai K, Wakai A, 2004. Lateral resistance of short single piles and pile groups located near slopes. International Journal of Geomechanics, 4(2):93–103. https://doi.org/10.1061/(asce)1532-3641(2004)4:2(93) CrossRefGoogle Scholar
  5. Chang BJ, Hutchinson TC, 2013. Experimental evaluation of p-y curves considering development of liquefaction. Journal of Geotechnical and Geoenvironmental Engineering, 139(4):577–586. https://doi.org/10.1061/(asce)gt.1943-5606.0000802 CrossRefGoogle Scholar
  6. Choy CK, Standing JR, Mair RJ, 2007. Stability of a loaded pile adjacent to a slurry-supported trench. Gechnique, 57(10):807–819. https://doi.org/10.1680/geot.2007.57.10.807 Google Scholar
  7. El Sawwaf M, 2006. Lateral resistance of single pile located near geosynthetic reinforced slope. Journal of Geotechnical and Geoenvironmental Engineering, 132(10):1336–1345. https://doi.org/10.1061/(asce)1090-0241(2006)132:10(1336) CrossRefGoogle Scholar
  8. El Sawwaf M, 2010. Experimental and numerical study of strip footing supported on stabilized sand slope. Geotechnical and Geological Engineering, 28(4):311–323. https://doi.org/10.1007/s10706-009-9293-9 CrossRefGoogle Scholar
  9. Gabr MA, Borden RH, Cho KH, et al., 2002. P-y Curves for Laterally Loaded Drilled Shafts Embedded in Weathered Rock. FHWA/NC/2002-08, North Carolina State University, Raleigh, USA.Google Scholar
  10. Gazioglu SM, O’Neill MW, 1984. Evaluation of P-Y relationships in cohesive soils. Proceedings of Analysis and Design of Pile Foundations, p.192–213.Google Scholar
  11. Georgiadis K, 2014. Variation of limiting lateral soil pressure with depth for pile rows in clay. Computers and Geotechnics, 62:164–174. https://doi.org/10.1016/j.compgeo.2014.07.011 CrossRefGoogle Scholar
  12. Georgiadis K, Georgiadis M, 2010. Undrained lateral pile response in sloping ground. Journal of Geotechnical and Geoenvironmental Engineering, 136(11):1489–1500. https://doi.org/10.1061/(asce)gt.1943-5606.0000373 CrossRefGoogle Scholar
  13. Georgiadis K, Georgiadis M, 2012. Development of p-y curves for undrained response of piles near slopes. Computers and Geotechnics, 40:53–61. https://doi.org/10.1016/j.compgeo.2011.09.005 CrossRefGoogle Scholar
  14. Gupta BK, Basu D, 2016. Analysis of laterally loaded rigid monopiles and poles in multilayered linearly varying soil. Computers and Geotechnics, 72:114–125. https://doi.org/10.1016/j.compgeo.2015.11.008 CrossRefGoogle Scholar
  15. Gupta BK, Basu D, 2017. Analysis of laterally loaded short and long piles in multilayered heterogeneous elastic soil. Soils and Foundations, 57(1):92–110. https://doi.org/10.1016/j.sandf.2017.01.007 CrossRefGoogle Scholar
  16. Haiderali AE, Madabhushi G, 2016. Evaluation of curve fitting techniques in deriving p-y curves for laterally loaded piles. Geotechnical and Geological Engineering, 34(5): 1453–1473. https://doi.org/10.1007/s10706-016-0054-2 CrossRefGoogle Scholar
  17. Ismael NF, 2010. Behavior of step tapered bored piles in sand under static lateral loading. Journal of Geotechnical and Geoenvironmental Engineering, 136(5):669–676. https://doi.org/10.1061/(asce)gt.1943-5606.0000265 CrossRefGoogle Scholar
  18. Kim BT, Kim NK, Lee WJ, et al., 2004. Experimental load-transfer curves of laterally loaded piles in Nak-Dong river sand. Journal of Geotechnical and Geoenvironmental Engineering, 130(4):416–425. https://doi.org/10.1061/(asce)1090-0241(2004)130:4(416) CrossRefGoogle Scholar
  19. Kodikara J, Haque A, Lee KY, 2010. Theoretical p-y curves for laterally loaded single piles in undrained clay using Bezier curves. Journal of Geotechnical and Geoenvironmental Engineering, 136(1):265–268. https://doi.org/10.1061/(asce)1090-0241(2010)136:1(265) CrossRefGoogle Scholar
  20. Kondner RL, 1963. Hyperbolic stress-strain response: cohesive soils. Journal of the Soil Mechanics and Foundations Division, 89(1):115–143.Google Scholar
  21. Leung CF, Chow YK, Shen RF, 2000. Behavior of pile subject to excavation-induced soil movement. Journal of Geotechnical and Geoenvironmental Engineering, 126(11): 947–954. https://doi.org/10.1061/(asce)1090-0241(2000)126:11(947) CrossRefGoogle Scholar
  22. Liang R, Yang K, Nusairat J, 2009. p-y criterion for rock mass. Journal of Geotechnical and Geoenvironmental Engineering, 135(1):26–36. https://doi.org/10.1061/(asce)1090-0241(2009)135:1(26) CrossRefGoogle Scholar
  23. Lirer S, 2012. Landslide stabilizing piles: experimental evidences and numerical interpretation. Engineering Geology, 149–150:70–77. https://doi.org/10.1016/j.enggeo.2012.08.002 CrossRefGoogle Scholar
  24. Matlock H, 1970. Correlation for design of laterally loaded piles in soft clay. Proceedings of the 2nd Annual Offshore Technology Conference, p.577–594. https://doi.org/10.4043/1204-MS Google Scholar
  25. McGann CR, Arduino P, Mackenzie-Helnwein P, 2011. Applicability of conventional p-y relations to the analysis of piles in laterally spreading soil. Journal of Geotechnical and Geoenvironmental Engineering, 137(6):557–567. https://doi.org/10.1061/(asce)gt.1943-5606.0000468 CrossRefGoogle Scholar
  26. Mezazigh S, Levacher D, 1998. Laterally loaded piles in sand: slope effect on P-Y reaction curves. Canadian Geotechnical Journal, 35(3):433–441. https://doi.org/10.1139/t98-016 CrossRefGoogle Scholar
  27. Miao LF, Goh ATC, Wong KS, et al., 2006. Threedimensional finite element analyses of passive pile behaviour. International Journal for Numerical and Analytical Methods in Geomechanics, 30(7):599–613. https://doi.org/10.1002/nag.493 zbMATHCrossRefGoogle Scholar
  28. Ng CWW, Zhang LM, 2001. Three-dimensional analysis of performance of laterally loaded sleeved piles in sloping ground. Journal of Geotechnical and Geoenvironmental Engineering, 127(6):499–509. https://doi.org/10.1061/(asce)1090-0241(2001)127:6(499) CrossRefGoogle Scholar
  29. Nimityongskul N, Ashford S, 2010. Effect of soil slope on lateral capacity of piles in cohesive soils. Proceedings of the 9th US National and 10th Canadian Conference on Earthquake Engineering, article 366.Google Scholar
  30. O’Neill MW, Raines DR, 1991. Load transfer for pipe piles in highly pressured dense sand. Journal of Geotechnical Engineering, 117(8):1208–1226. https://doi.org/10.1061/(asce)0733-9410(1991)117:8(1208) CrossRefGoogle Scholar
  31. Poulos HG, 1976. Behaviour of laterally loaded piles near a cut or slope. Australian Geomechanics Journal, G6(1):6–12.Google Scholar
  32. Poulos HG, 1995. Design of reinforcing piles to increase slope stability. Canadian Geotechnical Journal, 32(5):808–818. https://doi.org/10.1139/t95-078 CrossRefGoogle Scholar
  33. Rajashree SS, Sitharam TG, 2001. Nonlinear finite-element modeling of batter piles under lateral load. Journal of Geotechnical and Geoenvironmental Engineering, 127(7):604–612. https://doi.org/10.1061/(asce)1090-0241(2001)127:7(604) CrossRefGoogle Scholar
  34. Rao SN, Ramakrishna VGST, Raju GB, 1996. Behavior of pile-supported dolphins in marine clay under lateral loading. Journal of Geotechnical Engineering, 122(8): 607–612. https://doi.org/10.1061/(asce)0733-9410(1996)122:8(607) CrossRefGoogle Scholar
  35. Reese LC, Welch RC, 1975. Lateral loading of deep foundations in stiff clay. Journal of the Geotechnical Engineering Division, 101(7):633–649.Google Scholar
  36. Reese LC, Wang ST, Arrellaga JA, et al., 1997. LPILE Plus 3.0 for Windows. Ensoft, Inc., Austin, USA.Google Scholar
  37. Rollins KM, Peterson KT, Weaver TJ, 1998. Lateral load behavior of full-scale pile group in clay. Journal of Geotechnical and Geoenvironmental Engineering, 124(6): 468–478. https://doi.org/10.1061/(asce)1090-0241(1998)124:6(468) CrossRefGoogle Scholar
  38. Rose AV, Taylor RN, El Naggar MH, 2013. Numerical modeling of perimeter pile groups in clay. Canadian Geotechnical Journal, 50(3):250–258. https://doi.org/10.1139/cgj-2012-0194 CrossRefGoogle Scholar
  39. Springman SM, 1989. Lateral Loading on Piles Due to Simulated Embankment Construction. PhD Thesis, University of Cambridge, Cambridge, UK.Google Scholar
  40. Tang XC, Yang MH, 2018. Analysis of laterally-loaded piles in weathered rock slopes based on p-y curve method. International Journal of Geotechnical Engineering. https://doi.org/10.1080/19386362.2018.1498199 Google Scholar
  41. Timoshenko SP, Goodier JN, 1970. Theory of Elasticity, 3rd Edition. McGraw-Hill, London, UK.zbMATHGoogle Scholar
  42. Vesic AB, 1961. Beams on elastic subgrade and Winkler’s hypothesis. Proceedings of the 5th International Conference on Soil Mechanics and Foundation Engineering, p.845–850.Google Scholar
  43. Viggiani C, 1981. Ultimate lateral load on piles used to stabilize landslides. Proceedings of the 10th International Conference on Soil Mechanics and Foundation Engineering, p.555–560.Google Scholar
  44. Wang AH, Zhang DW, Deng YG, 2018. Lateral response of single piles in cement-improved soil: numerical and theoretical investigation. Computers and Geotechnics, 102: 164–178. https://doi.org/10.1016/j.compgeo.2018.06.014 CrossRefGoogle Scholar
  45. Won J, You K, Jeong S, et al., 2005. Coupled effects in stability analysis of pile-slope systems. Computers and Geotechnics, 32(4):304–315. https://doi.org/10.1016/j.compgeo.2005.02.006 CrossRefGoogle Scholar
  46. Yang EK, Choi JI, Kwon SY, et al., 2011. Development of dynamic p-y backbone curves for a single pile in dense sand by 1g shaking table tests. KSCE Journal of Civil Engineering, 15(5):813–821. https://doi.org/10.1007/s12205-011-1113-0 CrossRefGoogle Scholar
  47. Zhao ZH, Li DY, Zhang F, et al., 2017. Ultimate lateral bearing capacity of tetrapod jacket foundation in clay. Computers and Geotechnics, 84:164-173. https://doi.org/10.1016/j.compgeo.2016.12.005 Google Scholar
  48. Zhou JJ, Gong XN, Wang KH, et al., 2017. A simplified nonlinear calculation method to describe the settlement of pre-bored grouting planted nodular piles. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 18(11):895–909. https://doi.org/10.1631/jzus.A1600640 CrossRefGoogle Scholar
  49. Zhou JJ, Gong XN, Wang KH, et al., 2018. Effect of cemented soil properties on the behavior of pre-bored grouted planted nodular piles under compression. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 19(7):534–543. https://doi.org/10.1631/jzus.A1700118 CrossRefGoogle Scholar

Copyright information

© Zhejiang University and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.College of Civil EngineeringHunan UniversityChangshaChina

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