Experimental Study on Bearing Capacity of Pre-bored Grouted Planted Pile under Compression and Tension

被引:0
作者
Huang S. [1 ]
Zhou J. [1 ]
Gong X. [1 ]
Yu J. [1 ]
Shu J. [2 ]
Wang M. [2 ]
机构
[1] Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou
[2] ZCONE High-tech Pile Industry Holdings Co, Ltd, Ningbo
来源
Hunan Daxue Xuebao/Journal of Hunan University Natural Sciences | 2021年 / 48卷 / 01期
基金
中国国家自然科学基金;
关键词
Bearing capacity; Nodular pile; Pre-bored grouted planted pile; Uplift coefficient;
D O I
10.16339/j.cnki.hdxbzkb.2021.01.004
中图分类号
学科分类号
摘要
The bearing capacity of pre-bored grouted planted (PGP) pile under compression and tension is investigated based on a group of field compression and tension tests. The load-displacement curves of two test piles are compared and analyzed, and the effective stress method is adopted to estimate the shaft capacity of the test piles. The test results show that: the ultimate shaft resistance of PGP pile under tension is smaller than the ultimate shaft resistance of PGP pile under compression, due to the different stress conditions of the soil around the pile and the Poisson's ratio of pile shaft; the pile head displacement needed to fully mobilize the shaft resistance of test pile under tension is larger than the displacement needed to fully mobilize the shaft resistance of test pile under compression; a ultimate depth (or ultimate vertical effective stress) exists when the effective stress method is adopted to calculate the ultimate skin friction of the soil layers, and the value of the vertical effective stress corresponding to the ultimate depth should be adopted in the calculation of ultimate skin friction in effective stress method. © 2021, Editorial Department of Journal of Hunan University. All right reserved.
引用
收藏
页码:30 / 36
页数:6
相关论文
共 17 条
[1]  
ZHOU J J, GONG X N, WANG K H, Et al., Application of static drill rooted precast nodular pile in soft soil foundation and calculation for bearing capacity, Chinese Journal of Rock Mechanics and Engineering, 33, S2, pp. 4359-4366, (2014)
[2]  
ZHOU J J, WANG K H, GONG X N, Et al., Bearing capacity and load transfer mechanism of a static drill rooted nodular pile in soft soil areas, Journal of Zhejiang University-SCIENCE A(Applied Physics & Engineering), 14, 10, pp. 705-719, (2013)
[3]  
ZHOU J J, WANG K H, GONG X N, Et al., Bearing capacity and load transfer mechanism of static drill rooted nodular piles, Rock and Soil Mechanics, 35, 5, pp. 1367-1376, (2014)
[4]  
ZHOU J J, GONG X N, WANG K H, Et al., Shaft capacity of the pre-bored grouted planted pile in dense sand, Acta Geotechnica, 13, 5, pp. 1227-1239, (2018)
[5]  
ZHOU J J, GONG X N, WANG K H, Et al., 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, pp. 534-543, (2018)
[6]  
GONG X N, SHAO J H, XIE C, Et al., Model test on influence of enlarged head size on bearing capacity of pile end, Journal of Hunan University(Natural Sciences), 45, 11, pp. 102-109, (2018)
[7]  
Technical code for building pile foundations: JGJ 94-2008, pp. 26-28
[8]  
JARDINE R J, CHOW F C, OVERY R, Et al., ICP design methods for driven piles in sands and clays, pp. 15-58, (2005)
[9]  
DE NICOLA A, RANDOLPH M F., Tensile and compressive shaft capacity of piles in sand, Journal of Geotechnical Engineering, 119, 12, pp. 1952-1973, (1993)
[10]  
FLEMING K, WELTMAN A, RANDOLPH M, Et al., Piling engineering, pp. 95-118, (2009)