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CLC number: TU47

On-line Access: 2013-10-07

Received: 2013-04-11

Revision Accepted: 2013-07-30

Crosschecked: 2013-09-12

Cited: 11

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Citations:  Bibtex RefMan EndNote GB/T7714

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Journal of Zhejiang University SCIENCE A 2013 Vol.14 No.10 P.705-719

http://doi.org/10.1631/jzus.A1300139


Bearing capacity and load transfer mechanism of a static drill rooted nodular pile in soft soil areas


Author(s):  Jia-jin Zhou1, Kui-hua Wang1, Xiao-nan Gong1, Ri-hong Zhang2

Affiliation(s):  1. Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China; more

Corresponding email(s):   zjjmuforever@163.com

Key Words:  Static drill rooted nodular pile, Load transfer, Bearing capacity, ABAQUS, Double stress dispersion system, Three-dimensional modeling


Jia-jin Zhou, Kui-hua Wang, Xiao-nan Gong, Ri-hong Zhang. Bearing capacity and load transfer mechanism of a static drill rooted nodular pile in soft soil areas[J]. Journal of Zhejiang University Science A, 2013, 14(10): 705-719.

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doi="10.1631/jzus.A1300139"
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%A Jia-jin Zhou
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%A Xiao-nan Gong
%A Ri-hong Zhang
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T1 - Bearing capacity and load transfer mechanism of a static drill rooted nodular pile in soft soil areas
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A1 - Kui-hua Wang
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A1 - Ri-hong Zhang
J0 - Journal of Zhejiang University Science A
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A1300139


Abstract: 
The static drill rooted nodular pile is a new type of pile foundation consisting of precast nodular pile and the surrounding cemented soil. This composite pile has a relatively high bearing capacity and the mud pollution will be largely reduced during the construction process by using this type of pile. In order to investigate the bearing capacity and load transfer mechanism of this pile, a group of experiments were conducted to provide a comparison between this new pile and the bored pile. The axial force of a precast nodular pile was also measured by the strain gauges installed on the pile to analyze the distribution of the axial force of the nodular pile and the skin friction supported by the surrounding soil, then 3D models were built by using the ABAQUS finite element program to investigate the load transfer mechanism of this composite pile in detail. By combining the results of field tests and the finite element method, the outcome showed that the bearing capacity of a static drill rooted nodular pile is higher than the bored pile, and that this composite pile will form a double stress dispersion system which will not only confirm the strength of the pile, but also make the skin friction to be fully mobilized. The settlement of this composite pile is mainly controlled by the precast nodular pile; meanwhile, the nodular pile and the surrounding cemented soil can be considered as deformation compatibility during the loading process. The nodes on the nodular pile play an important role during the load transfer process, the shear strength of the interface between the cemented soil and the soil of the static drill rooted pile is larger than that of the bored pile.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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