Experimental investigation on resistance and response of jacked model piles in sand

被引：0
|
作者：
Xiao Z. [1 ]
Wang Y. [1 ]
Zhao X. [2 ,3 ]
Jiang M. [1 ]
Zhao W. [4 ]
机构：
[1] College of Civil Engineering, Henan University of Technology, Zhengzhou
[2] Geotechnical Engineering Department, Nanjing Hydraulic Research Institute, Nanjing
[3] College of Civil and Transportation Engineering, Hohai University, Nanjing
[4] Henan Jianke Foundation Engineering Co., Limited, Zhengzhou
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2022年 / 43卷 / 11期
关键词：
jacked pile; model test; pile foundation; radial stress of soil surrounding pile; resistance installation of pile; sand foundation;
D O I：
10.14006/j.jzjgxb.2020.0793
中图分类号：
学科分类号：
摘要：
The installation resistance is important for selecting the type of jacked equipment. However, the calculation method of installation resistance has not been unified, and the radial stress distribution law of the soil surrounding the pile caused by installation pile is not yet clear. In this paper, a series of tests were performed on model pile jacked in sand, and the driven speed and pile length were considered. The changes of installation resistance, end resistance, radial stress and ultimate capacity of pile of jacked pile were analyzed. The pile length is the most significant factor that affects installation resistance, end resistance, radial stress and ultimate capacity of piles. Although the ratio of end resistance to installation resistance decreases with the depth, the end resistance is always dominant in the installation process of piles, and the ratio of end resistance to installation resistance is up to 75% when the depth is 12 times of pile diameter. The tendency for the radial stress of the soil surrounding the pile is closer to Rankine’s earth pressure with the depth. It is related to the compaction effect of jacked pile, increasing pile length or reducing the driving speed can improve the compaction effect of jacked pile. The radial stress of the soil surrounding the pile has a degradation phenomenon, which is related to the jacking pile and the pile rebound. Moreover, a modified methodology was proposed based on Terzaghi’ s bearing capacity theory. Combined with the theory of Rankin passive earth pressure, the calculation formula of Rankin passive earth pessure correction for the radial stress of the soil surrounding the pile calculation was proposed, which can be used for the radial stress of the soil surrounding the pile after the installation pile. © 2022 Science Press. All rights reserved.
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页码：294 / 302
页数：8
相关论文
共 25 条
  • [1] LI Jingpei, LI Lin, SUN Dean, Et al., Theoretical study on sinking resistance of jacked piles in saturated soft clay, Chinese Journal of Geotechnical Engineering, 37, 8, pp. 1454-1461, (2015)
  • [2] WANG Yonghong, ZHANG Mingyi, BAI Xiaoyu, Et al., Study of penetration characteristics and influence factor of jacked pile based on fiber Bragg grating sensing technology, Rock and Soil Mechanics, 40, 12, pp. 4801-4812, (2019)
  • [3] YE Jianzhong, ZHOU Jian, HAN Bing, Numerical simulation of punching processes by particle flow code based on discrete element method, Chinese Journal of Rock Mechanics and Engineering, 26, pp. 3058-3064, (2007)
  • [4] ZHOU Jian, DENG Yibing, YE Jianzhong, Et al., Experimental and numerical analysis of jacked piles during installation in sand, Chinese Journal of Geotechnical Engineering, 31, 4, pp. 501-507, (2009)
  • [5] LUO Zhanyou, XIA Jianzhong, GONG Xiaonan, Et al., Study of compacting soil displacements around jacked single pile based on excess pore pressure dissipation, Chinese Journal of Rock Mechanics and Engineering, 33, pp. 2765-2772, (2014)
  • [6] LI Jingpei, FANG Rui, LI Lin, Et al., Study of mechanical properties of soil around jacked piles considering variable consolidation coefficient, Rock and Soil Mechanics, 37, 3, pp. 679-686, (2016)
  • [7] YU Feng, THAM Leslie George, YANG Jun, Et al., Observed long-term behavior of residual stress in jacked pile, Rock and Soil Mechanics, 32, 8, pp. 2318-2324, (2011)
  • [8] ZHANG Zhongmiao, LIU Junwei, YU Feng, Relationship between terminative jacking force and ultimate bearing capacity of jacked pipe piles, Chinese Journal of Geotechnical Engineering, 32, 8, pp. 1207-1213, (2010)
  • [9] YANG Suchun, ZHANG Mingyi, WANG Yonghong, Et al., Field test on pile tip resistance of closed-end jacked pipe pile penetrating into layered foundation, Rock and Soil Mechanics, 39, pp. 91-99, (2018)
  • [10] KOU Hailei, ZHANG Mingyi, BAI Xiaoyu, Field performance of residual stresses in jacked PHC pipe piles in layered ground, Chinese Journal of Geotechnical Engineering, 35, 7, pp. 1328-1336, (2013)
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