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| Model test of foundation with geosyntheticencased stone column |
| Zhejiang Provincial Institute of Communications Planning, Design ＆ Research, Hangzhou, Zhejiang 310006, China; 2.College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, Zhejiang 310058, China; 3.Department of Urban Construction Engineering, Zhejiang College of Construction, Hangzhou, Zhejiang 311231, China |
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Abstract To investigate the stressstrain characteristics of foundations with geosyntheticencased stone columns, static staircased loading tests were conducted on the unit cell model of composite foundations with geosyntheticencased stone column (GEC) and ordinary granular column (OGC). The settlements, stresses of column and soil at the top of model and the stresses of geotextiles under different loadings were analyzed. The results demonstrate that under the same loading, the model with GEC has less settlements and bigger columnsoil stress ratio than those with OGC. Comparing the test results of settlements and stresses ratio of column and soil with elastic and elastoplastic theoretical analyses, it is found that elastic analysis overestimates the performance of composite foundation with OGC or GEC is overestimated by elastic analysis, while the elastoplastic theoretical analysis shows good agreement with experimental data. The elastoplastic theoretical analysis presents closer encasement stress to the test results. The elastoplastic theoretical analysis is suitable for engineering design of foundations with geosyntheticencased stone columns.
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Received: 23 September 2012
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2013, Vol. 34 
