A simplified method for investigating the bending behavior of piles supporting embankments on soft ground

doi:10.1007/s11709-023-0952-3

Frontiers of Structural and Civil Engineering

2023, Vol. 17

Issue (7): 1021-1032 https://doi.org/10.1007/s11709-023-0952-3

本期目录

A simplified method for investigating the bending behavior of piles supporting embankments on soft ground

Yu DIAO^1,²(

), Yuhao GUO^1,², Zhenyang JIA^1,², Gang ZHENG^1,², Weiqiang PAN^1,^2,³, Dongfan SHANG⁴, Ying ZHANG⁵

¹. Key Laboratory of Coastal Civil Engineering Structure and Safety of Ministry of Education, Tianjin University, Tianjin 300072, China
². Department of Civil Engineering, Tianjin University, Tianjin 300072, China
³. Shanghai Tunnel Engineering Construction Co., Ltd., Shanghai 200032, China
⁴. Hebei Academy of Building Research Co., Ltd., Shijiazhuang 050000, China
⁵. Tianjin Municipal Engineering Design & Research Institute, Tianjin 300392, China

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Abstract：

In recent years, concrete and reinforced concrete piles have been widely used to stabilize soft ground under embankments. Previous research has shown that bending failure, particularly during rapid filling on soft ground, is the critical failure mode for pile-supported embankments. Here, we propose an efficient two-stage method that combines a test-verified soil deformation mechanism and Poulos’ solution for pile–soil interaction to investigate the bending behavior of piles supporting embankments on soft ground. The results reveal that there are three possible bending failure scenarios for such piles: at the interface between the soft and firm ground layers, at mid-depths of the fan zone, and at the boundary of the soil deformation mechanism. The location of the bending failure depends on the position and relative stiffness of the given pile. Furthermore, the effect of embedding a pile into a firm ground layer on the bending behavior was investigated. When the embedded length of a pile exceeded a critical value, the bending moment at the interface between the soft and firm ground layers reached a limiting value. In addition, floating piles that are not embedded exhibit an overturning pattern of movement in the soft ground layer, and a potential failure is located in the upper part of these piles.

Key words： bending behavior pile embankment soil−structure interaction failure mode

收稿日期: 2022-09-21 出版日期: 2023-09-20

Corresponding Author(s): Yu DIAO

引用本文:

. [J]. Frontiers of Structural and Civil Engineering, 2023, 17(7): 1021-1032.
Yu DIAO, Yuhao GUO, Zhenyang JIA, Gang ZHENG, Weiqiang PAN, Dongfan SHANG, Ying ZHANG. A simplified method for investigating the bending behavior of piles supporting embankments on soft ground. Front. Struct. Civ. Eng., 2023, 17(7): 1021-1032.

链接本文:

https://academic.hep.com.cn/fsce/CN/10.1007/s11709-023-0952-3
https://academic.hep.com.cn/fsce/CN/Y2023/V17/I7/1021

Fig.1

zone	horizontal displacement (u)	vertical displacement (v)
active	$? 2 w max 4 [1 ? cos ? 2 π D ˉ a λ]$	$? 2 w max 4 [1 ? cos ? 2 π D ˉ a λ]$
fan	$w max 2 [1 ? cos ? 2 π D ˉ f λ] y D ˉ f$	$? w max 2 [1 ? cos ? 2 π D ˉ f λ] x D ˉ f$
passive	$? 2 w max 4 [1 ? cos ? 2 π D ˉ p λ]$	$2 w max 4 [1 ? cos ? 2 π D ˉ p λ]$

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1	G Zheng, X Y Yang, H Z Zhou, J C Chai. Numerical modeling of progressive failure of rigid piles under embankment load. Canadian Geotechnical Journal, 2019, 56(1): 23–34 https://doi.org/10.1139/cgj-2017-0613
2	L Wang, P Wang, K Wei, R Dollevoet, Z Li. Ground vibration induced by high speed trains on an embankment with pile-board foundation: Modelling and validation with in situ tests. Transportation Geotechnics, 2022, 34: 100734 https://doi.org/10.1016/j.trgeo.2022.100734
3	G ZhengL Liu. Numerical analysis of the pile lateral behavior and anti-slip mechanism of rigid pile supported embankments. In: Proceedings of U.S.−China Workshop on Ground Improvement Technologies 2009. Reston: American Society of Civil Engineers, 2009, 63–72
4	G ZhengL LiuJ Han. Stability of embankment on soft subgrade reinforced by rigid inclusions (II)-group piles analysis. Chinese Journal of Geotechnical Engineering, 2010, 32: 1811−1820 (in Chinese)
5	C Sagaseta. Analysis of undrained soil deformation due to ground loss. Géotechnique, 1987, 37(3): 301–320 https://doi.org/10.1680/geot.1987.37.3.301
6	J HanJ C ChaiD LeshchinskyS L Shen. Evaluation of deep-seated slope stability of embankments over deep mixed foundations. In: Proceedings of GeoSupport Conference 2004. Reston: American Society of Civil Engineers, 2004
7	M NavinG Filz. Numerical stability analyses of embankments supported on deep mixed columns. In: Proceedings of GeoShanghai International Conference 2006. Reston: American Society of Civil Engineers, 2006, 1–8
8	D E Ong, C E Leung, Y K Chow. Pile behavior due to excavation-induced soil movement in clay. I: Stable wall. Journal of Geotechnical and Geoenvironmental Engineering, 2006, 132(1): 36–44 https://doi.org/10.1061/(ASCE)1090-0241(2006)132:1(36
9	C F Leung, D E Ong, Y K Chow. Pile behavior due to excavation-induced soil movement in clay. II: Collapsed wall. Journal of Geotechnical and Geoenvironmental Engineering, 2006, 132(1): 45–53 https://doi.org/10.1061/(ASCE)1090-0241(2006)132:1(45
10	W D Guo. Response and stability of piles subjected to excavation loading. International Journal of Geomechanics, 2021, 21(1): 04020238 https://doi.org/10.1061/(ASCE)GM.1943-5622.0001866
11	D E L Ong, C F Leung, Y K Chow, T G Ng. Severe damage of a pile group due to slope failure. Journal of Geotechnical and Geoenvironmental Engineering, 2015, 141(5): 04015014 https://doi.org/10.1061/(ASCE)GT.1943-5606.0001294
12	8006:1995 BS. Code of Practice for Strengthened/Reinforced Soils and Other Fills. London: British Standards Institution, 1995
13	Y Zhuang, K Wang. Finite element analysis on the dynamic behavior of soil arching effect in piled embankment. Transportation Geotechnics, 2018, 14: 8–21 https://doi.org/10.1016/j.trgeo.2017.09.001
14	H Z ZhouH J XuX X YuZ Y GuoG ZhengX Y YangY Tian. Evaluation of the bending failure of columns under an embankment loading. International Journal of Geomechanics, 2021, 21(7): 4021112
15	B Indraratna, A Aljorany, C Rujikiatkamjorn. Analytical and numerical modeling of consolidation by vertical drain beneath a circular embankment. International Journal of Geomechanics, 2008, 8(3): 199–206 https://doi.org/10.1061/(ASCE)1532-3641(2008)8:3(199
16	D Q Zhou, C X Feng, L X Li, Y Zhou, Q Zhu. Reinforcement effect of inclined prestressed concrete pipe piles on an inclined soft foundation. Advances in Civil Engineering, 2020, 2020: 5275903 https://doi.org/10.1155/2020/5275903
17	J Han, A Bhandari, F Wang. DEM analysis of stresses and deformations of geogrid-reinforced embankments over piles. International Journal of Geomechanics, 2012, 12(4): 340–350 https://doi.org/10.1061/(ASCE)GM.1943-5622.0000050
18	G ZhengS LiY Diao. Centrifugal model tests on failure mechanisms of embankments on soft ground reinforced by rigid piles. Chinese Journal of Geotechnical Engineering, 2012, 34: 1977−1989 (in Chinese)
19	J C Chai, S Sakajo, N Miura. Stability analysis of embankment on soft ground (A case study). Soil and Foundation, 1994, 34(2): 107–114 https://doi.org/10.3208/sandf1972.34.2_107
20	T D Stark, P J Ricciardi, R D Sisk. Case study: Vertical drain and stability analyses for a compacted embankment on soft soils. Journal of Geotechnical and Geoenvironmental Engineering, 2018, 144(2): 05017007 https://doi.org/10.1061/(ASCE)GT.1943-5606.0001786
21	W D Guo. Elastic models for nonlinear response of rigid passive piles. International Journal for Numerical and Analytical Methods in Geomechanics, 2014, 38(18): 1969–1989 https://doi.org/10.1002/nag.2292
22	S W AbushararJ Han. Two-dimensional deep-seated slope stability analysis of embankments over stone column-improved soft clay. Engineering Geology, 2011, 120(1−4): 103−110
23	Z Zhang, J Han, G Ye. Numerical investigation on factors for deep-seated slope stability of stone column-supported embankments over soft clay. Engineering Geology, 2014, 168: 104–113 https://doi.org/10.1016/j.enggeo.2013.11.004
24	A Osman, M Bolton. A new design method for retaining walls in clay. Canadian Geotechnical Journal, 2004, 41: 451–466 https://doi.org/10.1139/t04-003
25	A Osman, M Bolton. Simple plasticity-based prediction of the undrained settlement of shallow circular foundations on clay. Géotechnique, 2005, 55(6): 435–447 https://doi.org/10.1680/geot.2005.55.6.435
26	S Y Lam, M D Bolton. Energy conservation as a principle underlying mobilizable strength design for deep excavations. Journal of Geotechnical and Geoenvironmental Engineering, 2011, 137(11): 1062–1074 https://doi.org/10.1061/(ASCE)GT.1943-5606.0000510
27	Z Zhang, M Huang, C Xu, Y Jiang, W Wang. Simplified solution for tunnel−soil−pile interaction in Pasternak’s foundation model. Tunnelling and Underground Space Technology, 2018, 78: 146–158 https://doi.org/10.1016/j.tust.2018.04.025
28	Z Jia. A simplified method of soft grounds improved by rigid piles under construction of embankment. Thesis for the Master’s Degree. Tianjin: Tianjin University, 2019 (in Chinese)
29	H G PoulosE H Davis. Pile Foundation Analysis and Design. New York: Wiley, 1980
30	D J Douglas, E H Davis. The movement of buried footings due to moment and horizontal load and the movement of anchor plates. Géotechnique, 1964, 14(2): 115–132 https://doi.org/10.1680/geot.1964.14.2.115
31	Z ZhangJ HanG Ye. Numerical analysis of failure modes of deep mixed column-supported embankments on soft soils. In: Proceedings of Geo-Shanghai 2014. Reston: American Society of Civil Engineers, 2014: 78−87
32	J A Dìaz-Rodrìguez, S Leroueil, J D Alemàn. Yielding of Mexico city clay and other natural clays. Journal of Geotechnical Engineering, 1992, 118(7): 981–995 https://doi.org/10.1061/(ASCE)0733-9410(1992)118:7(981
33	P J Vardanega, M D Bolton. Strength mobilization in clays and silts. Canadian Geotechnical Journal, 2011, 48(10): 1485–1503 https://doi.org/10.1139/t11-052
34	M M Futai, M S S Almeida, W A Lacerda. Yield, strength, and critical state behavior of a tropical saturated Soil. Journal of Geotechnical and Geoenvironmental Engineering, 2004, 130(11): 1169–1179 https://doi.org/10.1061/(ASCE)1090-0241(2004)130:11(1169
35	J Burland, S Rampello, V Georgiannou, G Calabresi. A laboratory study of the strength of four stiff clays. Géotechnique, 1996, 46(3): 491–514 https://doi.org/10.1680/geot.1996.46.3.491
36	C C Ladd, T W Lambe. The strength of “undisturbed” clay determined from undrained tests. American Society for Testing and Materials special technical publications, 1963, 361: 342–371 https://doi.org/10.1520/STP30011S
37	G ZhengY DiaoS LiJ Han. Stability failure modes of rigid column-supported embankments. In: Proceedings of Geo-Congress 2013. Reston: American Society of Civil Engineers, 2013, 1814–1817
38	G Zheng, X Yang, H Zhou, J Chai. Numerical modeling of progressive failure of rigid piles under an embankment load. Canadian Geotechnical Journal, 2018, 56(1): 23–34 https://doi.org/10.1139/cgj-2017-0613
39	M Kitazume, K Orano, S Miyajima. Centrifuge model tests on failure envelope of column type deep mixing method improved ground. Soil and Foundation, 2000, 40(4): 43–55 https://doi.org/10.3208/sandf.40.4_43

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