Abstract
This chapter provides an understanding of the performance of the geocell-reinforced sand foundations having clay subgrades of varying strengths. Model tests were conducted on a rigid circular model footing of 150 mm diameter (D) resting on foundation beds of different configurations prepared in a steel tank having dimensions of 1 m × 1 m × 1 m. Different foundation configurations were considered by varying thickness of reinforced and unreinforced sand layers overlying a wide range of subsoil strengths, from very soft to stiff clay, varying the undrained shear strengths (cu) from 7 to 60 kPa. The results are presented in terms of bearing pressure and surface deformations responses at different loading stages. The results are further analyzed in terms of foundation reaction modulus, improvement factors, and percentage reduction in settlement. The outcomes of the study indicate that the geocell-induced improvement in the foundation performance is significantly influenced by the subgrade strength. For lower subgrade strength soil, the degree of improvement is highest, and it is decreased nonlinearly with increase in subgrade strength.
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Murali Krishna, A., Biswas, A., Prasath, S.B., Dash, S.K. (2020). Performance of Geocell-Reinforced Sand Foundations with Clay Subgrades of Varying Strength. In: Sitharam, T., Hegde, A., Kolathayar, S. (eds) Geocells. Springer Transactions in Civil and Environmental Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-15-6095-8_6
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