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Geomechanics and Engineering Volume 10, Number 4, April 2016 , pages 405-422 DOI: https://doi.org/10.12989/gae.2016.10.4.405 |
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Behaviour of geocell reinforced soft clay bed subjected to incremental cyclic loading |
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A. Hegde and T.G. Sitharam
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| Abstract | ||
| The paper deals with the results of the laboratory cyclic plate load tests performed on the reinforced soft clay beds. The performances of the clay bed reinforced with geocells and geocells with additional basal geogrid cases are compared with the performance of the unreinforced clay beds. From the cyclic plate load test results, the coefficient of elastic uniform compression (Cu) was calculated for the different cases. The Cu value was found to increase in the presence of geocell reinforcement. The maximum increase in the Cu value was observed in the case of the clay bed reinforced with the combination of geocell and geogrid. In addition, 3 times increase in the strain modulus, 10 times increase in the bearing capacity, 8 times increase in the stiffness and 90% reduction in the settlement was observed in the presence of the geocell and geogrid. Based on the laboratory test results, a hypothetical case of a prototype foundation subjected to cyclic load was analyzed. The results revealed that the natural frequency of the foundation-soil system increases by 4 times and the amplitude of the vibration reduces by 92% in the presence of the geocells and the geogrids. | ||
| Key Words | ||
| geocells; cyclic plate load test; coefficient of elastic uniform compression; natural frequency; bearing capacity | ||
| Address | ||
| (1) A. Hegde: Department of Civil and Environmental Engineering, Indian Institute of Technology, Patna 801103, India; (2) T.G. Sitharam: Department of Civil Engineering, Indian Institute of Science, Bangalore 560012, India. | ||