Numerical Analysis on the Bearing Capacity of Post-grouting Bored Pile under Vertical Load

doi:10.16183/j.cnki.jsjtu.2006.12.023

Abstract

Abstract:

An analysis model of post-grouting bored pile and soil was built up by numerical method to simulate the bearing capacity of the pile. The results of numerical analysis on the pile load tests are agreement with the measured ones. The effects of post-grouting on bearing capacity were simulated by this method with considering the grouting volume, the strength of grouted soil body, the height of turn-up grout and the improvement of skin friction. The results show that the grouting volume and the strength of grouting soil body have a limited effect on the bearing capacity, and the increasing effect of the grouting volume is also influenced by the length of pile. The height of turn-up grout and the improvement of skin friction have a great effect on the bearing capacity, which is linearly increased with the increasing of the height of turn-up grout and the improvement of lateral friction.

Key words: bored pile, post-grouting at pile bottom, numerical analysis, bearing capacity

CLC Number:

TU473.1

HUANG Ji-long, CHEN Jin-jian, WANG Jian-hua. Numerical Analysis on the Bearing Capacity of Post-grouting Bored Pile under Vertical Load[J]. Journal of Shanghai Jiao Tong University, 2006, 40(12): 2122-2125.

Figures/Tables 7

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Tab. 1

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References 5

[1]	张忠苗, 吴世明, 包风. 钻孔灌注桩桩底后注浆机理与应用研究[J]. 岩土工程学报, 1999, 21(6): 681-686.
	ZHANG Zhong-miao, WU Shi-ming, BAO Feng. Study of mechanism and application on bored pile and grouting[J]. Chinese Journal of Geotechnical Engineering, 1999, 21(6): 681-686.
[2]	黄敏, 张克绪, 张尔齐. 桩底灌浆在桩端周围土体中引起的应力分析[J]. 哈尔滨工业大学学报, 2002, 34(3): 433-439.
	HUANG Min, ZHANG Ke-xu, ZHANG Er-qi. Analysis of stress in soil mass around pile bottom induced by grouting[J]. Journal of Harbin Institute of Technology, 2002, 34(3): 433-439.
[3]	胡庆立, 张克绪. 桩底压浆桩在轴向荷载作用下的有限元分析[J]. 哈尔滨建筑大学学报, 2002, 35(1): 48-52.
	HU Qing-li, ZHANG Ke-xu. Analysis of base-grouted pile under axial load[J]. Journal of Harbin University of Civll Engineering and Architecture, 2002, 35(1): 48-52.
[4]	龚维明, 蒋永生, 穆保岗, 等. 某海洋平台钢管桩可打性分析[J]. 岩土工程学报, 2000, 22(2): 227-230.
	GONG Wei-ming, JIANG Yong-sheng, MU Baogang, et al. Drivability analysis of steel pipe pile of offshore platform[J]. Chinese Journal of Geotechnical Engineering, 2000, 22(2): 227-230.
[5]	黄敏, 张克绪, 张尔齐. 桩底灌浆分析[J]. 哈尔滨建筑大学学报, 2001, 34(6): 39-44.
	HUANG Min, ZHANG Ke-xu, ZHANG Er-qi. Analysis for grouting at pile bottom[J]. Journal of Harbin University of Civll Engineering and Architecture, 2001, 34(6): 39-44.

层序	地层名称	土层厚度/m	γ_s/(kN·m^-3)	e	E_s/MPa	c/kPa	φ/(°)	μ
①	杂填土	3.59	?	?	?	?	?	?
②	粘土	?	17.8	1.10	27.32	10	18.0	0.33
③₂	砂质粉土	2.60	18.6	0.82	18.38	4	15.0	0.27
③₃	淤泥质粉质粘土	2.00	17.4	1.19	18.38	4	24.8	0.46
④	淤泥质粘土	3.10	16.6	1.47	52.29	14	11.5	0.20
⑤_1-1	淤泥质粉质粘土	11.20	17.5	1.13	62.97	12	19.5	0.35
⑤_1-2	粘土夹粉质粘土	5.00	17.7	1.08	57.00	16	15.0	0.27
⑥	粉质粘土	4.00	19.4	0.73	39.50	46	16.5	0.30
⑦₁	砂质粉土	4.00	18.5	0.87	98.30	3	31.0	0.60
⑦₂	粉细砂	65.00	19.1	0.74	180.00	1	32.5	0.61

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