The Behavior of Piles in Saturated Soil under Surcharge Loads

doi:10.16183/j.cnki.jsjtu.2006.12.025

Abstract

Abstract:

Large settlement occurs in soft clay foundation due to surcharge loads, which will affect the behavior of the pile foundation in site and nearby. Negative piles were studied by FEM considering the pile-soil slippage and consolidation of soil. Then settlement, side displacement, and axial force of piles were discussed and analyzed by using different contact surface of two examples. The comparison between the numerical analysis and in-situ tests shows the efficiency of the method and demonstrates some rules of soil settlement, pile axial force and moment, which can be used in engineering design.

Key words: surcharge loads, negative skin friction, contact face, pore pressure, finite element

CLC Number:

TU473.1

WANG Kai-min, WANG Jian-hua, CHEN Jin-jian, HOU Yong-mao. The Behavior of Piles in Saturated Soil under Surcharge Loads[J]. Journal of Shanghai Jiao Tong University, 2006, 40(12): 2130-2134.

Figures/Tables 8

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Tab. 1

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Tab. 2

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References 9

[1]	Chow Y K, Chin J T, Lee S L. Negative skin friction on pile groups[J]. International Journal for Numerical and Analytical Methods in Geomechanics, 1990, 14: 75-91.
[2]	Lee C Y. Pile groups under negative skin friction[J]. Journal of Geotechnical Engineering, 1993, 119(10): 1587-1600.
[3]	Lee C J. Development of downdrag on piles and pile groups in consolidation soil[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2004, 130(9): 905-914.
[4]	Ellis E A, Springman S M. Modelling of soil-structure interaction for a piled bridge abutment in plane strain FEM analysis[J]. Computer and Geotechnics, 2001, 28: 79-98.
[5]	魏焕卫, 杨敏. 大面积堆载情况下邻桩的有限元分析[J]. 工业建筑, 2000, 30(8): 30-33.
	WEI Huan-wei, YANG Min. Finite element analysis of adjacent pile under extensive accumulation[J]. Industrial Construction, 2000, 30(8): 30-33.
[6]	Bransby M F, Springman S M. 3-D finite element modeling of pile groups adjacent to surcharge loads[J]. Computer and Geotechnics, 1996, 19(4): 301-324.
[7]	屠毓敏. 承受超载作用的桩基性状研究[J]. 土木工程学报, 2002, 35(1): 79-82.
	TU Yu-min. Study on the behavior of pile foundation under overload[J]. China Civil Engineering Journal, 2002, 35(1): 79-82.
[8]	王建华, 陆建飞, 沈为平. Biot固结理论在单桩负摩擦研究中的应用[J]. 岩土工程学报, 2000, 22(5): 590-593.
	WANG Jian-hua, LU Jian-fei, SHEN Wei-ping. The application of Biot consolidation theory to the negative friction problem of single pile[J]. Chinese Journal of Geotechnical Engineering, 2000, 22(5): 590-593.
[9]	王建华, 高绍武, 陆建飞. 表面堆载作用下群桩负摩擦研究[J]. 计算力学学报, 2003, 20(2): 169-174.
	WANG Jian-hua, GAO Shao-wu, LU Jian-fei. Research of negative friction for pile groups under surface load[J]. Chinese Journal of Computational Mechanics, 2003, 20(2): 169-174.

?	p=50 kPa		p=100 kPa		p=300 kPa
?	固结前	固结后	固结前	固结后	固结前	固结后
超孔压/kPa	69.4	1.41	144	2.88	472	10
沉降/cm	9.32	11.3	19.5	23.5	80.3	94.5

土层	E₀/MPa	ν	φ/(°)	c/kPa	μ	γ/(kN·m³)	侧压力系数
淤泥质粘土	0.638	0.45	12	20	0.21	18	0.8
淤泥质粘土	3.346	0.40	13	40	0.23	18	0.6
亚粘土	11.901	0.35	16	60	0.29	18	0.5
粘土	5.217	0.40	10	70	0.18	18	0.6

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