ABSTRACT: Physical model tests were performed on geocell-reinforced foundation systems with circular footings to study the influence of the strength of the subgrade layer. Model tests were conducted with a 150 mm diameter circular footing supported on foundation beds with varied configurations. Three different series of tests were conducted using a clay subgrade with undrained cohesion in the range of 7–60 kPa and dense sand at 80% of relative density. The results showed that the performance of the geocell-reinforced foundation systems was highly dependent on the subgrade strength. A maximum improvement factor of about 11.6 was observed for very soft subgrade with cu = 7 kPa, which decreased to about 3 for stiffer subgrade having cu = 30 kPa under similar test conditions and configuration. In addition, the variation of bearing capacity improvement factors was observed to be significantly influenced by footing settlement and geocell height.
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December 2013
Research Article|
December 01 2013
Influence of subgrade strength on the performance of geocell-reinforced foundation systems
A. Biswas;
A. Biswas
1
Research Scholar, Department of Civil Engineering, Indian Institute of Technology Guwahati, Guwahati – 781039, India, Telephone: +91 9085670531, Telefax: + 91 361 2582440, E-mail: b.arghadeep@iitg.ernet.in
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A. Murali Krishna;
A. Murali Krishna
2
Assistant Professor, Department of Civil Engineering, Indian Institute of Technology Guwahati, Guwahati – 781039, India, Telephone: + 91 361 2582429, Telefax: + 91 361 2582440, E-mail: amurali@iitg.ernet.in
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S.K. Dash
S.K. Dash
3
Associate Professor, Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur – 721302, India, Telephone: +91 3222 282418, Telefax: +91 3222 255303, E-mail: sujit@civil.iitkgp.ernet.in
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Publisher: Emerald Publishing
Received:
May 02 2013
Revision Received:
August 06 2013
Accepted:
August 21 2013
Online ISSN: 1751-7613
Print ISSN: 1072-6349
© 2013 Thomas Telford Ltd
2013
Geosynthetics International (2013) 20 (6): 376–388.
Article history
Received:
May 02 2013
Revision Received:
August 06 2013
Accepted:
August 21 2013
Citation
Biswas A, Murali Krishna A, Dash S (2013), "Influence of subgrade strength on the performance of geocell-reinforced foundation systems". Geosynthetics International, Vol. 20 No. 6 pp. 376–388, doi: https://doi.org/10.1680/gein.13.00025
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