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CLC number: TU43

On-line Access: 2011-04-11

Received: 2009-10-29

Revision Accepted: 2010-03-15

Crosschecked: 2011-03-24

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Journal of Zhejiang University SCIENCE A 2011 Vol.12 No.4 P.268-277

http://doi.org/10.1631/jzus.A0900661


Consolidation solution for composite foundation considering a time- and depth-dependent stress increment along with three distribution patterns of soil permeability


Author(s):  Meng-meng Lu, Kang-he Xie, Chuan-xun Li, Kun Wang

Affiliation(s):  State Key Laboratory for Geomechanics and Deep Underground Engineering, School of Mechanics & Civil Engineering, China University of Mining & Technology, Xuzhou 221008, China, MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou 310058, China

Corresponding email(s):   lumm79@126.com

Key Words:  Consolidation, Composite foundation, Stone column, Permeability, Ramp load, Disturbance effect


Meng-meng Lu, Kang-he Xie, Chuan-xun Li, Kun Wang. Consolidation solution for composite foundation considering a time- and depth-dependent stress increment along with three distribution patterns of soil permeability[J]. Journal of Zhejiang University Science A, 2011, 12(4): 268-277.

@article{title="Consolidation solution for composite foundation considering a time- and depth-dependent stress increment along with three distribution patterns of soil permeability",
author="Meng-meng Lu, Kang-he Xie, Chuan-xun Li, Kun Wang",
journal="Journal of Zhejiang University Science A",
volume="12",
number="4",
pages="268-277",
year="2011",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A0900661"
}

%0 Journal Article
%T Consolidation solution for composite foundation considering a time- and depth-dependent stress increment along with three distribution patterns of soil permeability
%A Meng-meng Lu
%A Kang-he Xie
%A Chuan-xun Li
%A Kun Wang
%J Journal of Zhejiang University SCIENCE A
%V 12
%N 4
%P 268-277
%@ 1673-565X
%D 2011
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A0900661

TY - JOUR
T1 - Consolidation solution for composite foundation considering a time- and depth-dependent stress increment along with three distribution patterns of soil permeability
A1 - Meng-meng Lu
A1 - Kang-he Xie
A1 - Chuan-xun Li
A1 - Kun Wang
J0 - Journal of Zhejiang University Science A
VL - 12
IS - 4
SP - 268
EP - 277
%@ 1673-565X
Y1 - 2011
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A0900661


Abstract: 
In actual engineering practice, the stress increment within a composite foundation caused by external loads may vary simultaneously with depth and time. In addition, column installation always leads to a decay of soil permeability towards the column. However, almost none of the consolidation theories for composite foundation comprehensively consider these factors until now. For this reason, a stress increment due to external loads changing simultaneously with time and depth was incorporated into the analysis, and three possible variation patterns of soil’s horizontal permeability coefficient were considered to account for the detrimental influence of column installation. These three patterns included a constant distribution pattern (Pattern I), a linear distribution pattern (Pattern II), and a parabolic distribution pattern (Pattern III). Solutions were obtained for the average excess pore water pressures and the average degree of consolidation respectively. Then several special cases were discussed in detail based on the general solution obtained. Finally, comparisons were made, and the results show that the present solution is the most general rigorous solution in the literature, and it can be broken down into a number of previous solutions. The consolidation rate is accelerated with the increase in the value of the top to the bottom stress ratio. The consolidation rate calculated by the solution for Pattern I is less than that for Pattern II, which in turn is less than that for Pattern III.

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