[1] Gao Rui, Hu Nian, Zhu Bin, et al. Experimental study and numerical analysis on bearing behaviorsof super-long rock-socketed bored pile groups [J]. Journal of Southeast University (English Edition), 2010, 26 (4): 597-602. [doi:10.3969/j.issn.1003-7985.2010.04.020]

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Experimental study and numerical analysis on bearing behaviorsof super-long rock-socketed bored pile groups()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

26

Issue:

2010 4

Page:

597-602

Research Field:

Civil Engineering

Publishing date:

2010-12-30

Info

Title:

Experimental study and numerical analysis on bearing behaviorsof super-long rock-socketed bored pile groups

Author(s):

Gao Rui¹;  2;  Hu Nian¹;  2;  Zhu Bin³

¹School of Civil Engineering, Wuhan University, Wuhan 430072, China
²School of Civil Engineering, University of Nottingham, Nottingham NG7 2RD, UK
³Wuhan Tianxingzhou Road-Bridge Investment and Development Co. Ltd., Wuhan 430015, China

Keywords:

super-long rock-socketed pile;  bored pile groups;  centrifuge modeling test;  finite element analysis

PACS:

TU473

DOI:

10.3969/j.issn.1003-7985.2010.04.020

Abstract:

A centrifuge modeling test and a three-dimensional finite element analysis(FEA)of super-long rock-socketed bored pile groups of the Tianxingzhou Bridge are proposed. Based on the similarity theory, different prototypical materials are simulated using different indicators in the centrifuge model. The silver sand, the shaft and the pile cap are simulated according to the natural density, the compressive stiffness and the bending stiffness, respectively. The finite element method(FEM)is implemented and analyzed in ANSYS, in which the stress field during the undisturbed soil stage, the boring stage, the concrete-casting stage and the curing stage are discussed in detail. Comparisons in terms of load-settlement, shaft axial force distribution and lateral friction between the numerical results and the test data are carried out to investigate the bearing behaviors of super-long rock-socketed bored pile groups under loading and unloading conditions. Results show that there is a good agreement between the centrifuge modeling tests and the FEM. In addition, the load distribution at the pile top is complicated, which is related to the stiffness of the cap, the corresponding assumptions and the analysis method. The shaft axial force first increases slightly with depth then decreases sharply, and the rate of decrease in rock is greater than that in sand and soil.

References:

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Memo

Memo:

Biography: Gao Rui(1975—), male, doctor, associate professor, gaorui@whu.edu.cn.
Foundation item: The Natural Science Foundation of Hubei Province(No.2007ABA094).
Citation: Gao Rui, Hu Nian, Zhu Bin. Experimental and numerical analysis on bearing behaviors of super-long rock-socketed bored pile groups[J].Journal of Southeast University(English Edition), 2010, 26(4):597-602.

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