Journal
INTERNATIONAL JOURNAL OF GEOTECHNICAL ENGINEERING
Volume 16, Issue 6, Pages 776-785Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/19386362.2019.1653506
Keywords
Soil improvement; stone column; field test; soft soil; field instrumentation; in-situ testing; numerical analysis
Categories
Funding
- Brazilian National Funding Agency
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This paper presents a study on the field behaviour of a stone columns-reinforced soft foundation through a comparison with numerical analysis. The results show that the numerical model can predict the deformations and excess pore pressure variations of the reinforced foundation effectively.
This paper described field behaviour of a stone columns-reinforced soft foundation at a coal and ore stockyard followed by a comparison with numerical analysis. Performance of a 130-m-wide section with two ore stacks was recorded along a 500-operative day. An extensive instrumentation, comprising 14 sensors, was used to monitor the serviceability behaviour of the stabilized area. Complementary numerical analysis was performed using PLAXIS 2D finite element code, with which the increase in lateral earth pressure due to column installation was suitably modeled. The numerical analysis was carried out using plane strain approach, in which the stone columns were converted into the equivalent walls. Results showed that the adopted plane strain model could predict well measured total deformations of the reinforced foundation. Simulated curves of excess pore pressure also showed similar behaviour to the field data with a maximum value upon loading application followed by a gradual dissipation in consolidation stages.
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