Centrifuge modeling of ground improvement under embankments

Weber, Thomas

doi:10.1556/pollack.1.2006.2.1

Cited by 3 publications

(1 citation statement)

References 8 publications

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“…This phenomenon has been termed as "smear", while the zone of disturbance is called "smear zone". Due to reduction in permeability and compressibility, the consolidation is retarded to some extent, affecting the ground settlement rate [41]. Several past contributions on finite element analyses of stone column reinforced soft ground performance did not consider the smear zone effects [42][43][44].…”

Section: Finite Element Analysismentioning

confidence: 99%

Load-Settlement Characteristics of Stone Column Reinforced Soft Marine Clay Deposit: Combined Field and Numerical Studies

Basack

Nimbalkar

2023

Sustainability

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Foundations supporting infrastructure built on soft and compressible marine soil are unlikely to sustain due to possibility of undrained shear failure or excessive settlement of the supporting soil. This necessitates the importance of implementing an adequate ground improvement strategy. Among different techniques, soft soil reinforcing by the installation of stone columns is one of the most successful methods in terms of long-term stability of foundations. To investigate the load-settlement characteristics of such reinforced soil, a group of closely spaced stone columns was constructed at a location along the eastern coast of Australia. The site geology revealed thick layers of soft, compressible marine clay deposit. These stone columns were loaded by constructing earthen embankment and the resulting load-settlement characteristics were measured by an array of sensors. A two-dimensional plane strain analysis was performed using finite element modeling simulations. Comparison of numerical results with the field data demonstrated accuracy of the numerical model. Additional studies were carried out to investigate the efficiency of the model. This paper integrates the new findings from the full-scale field study and advanced numerical simulations while drawing pertinent conclusions.

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Section: Finite Element Analysismentioning

confidence: 99%

Load-Settlement Characteristics of Stone Column Reinforced Soft Marine Clay Deposit: Combined Field and Numerical Studies

Basack

Nimbalkar

2023

Sustainability

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Monitoring of embankment construction processes

Koch¹

2007

Pollack Periodica

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Behaviour of soft ground improved by conventional and geogrid-encased stone columns, based on FEM study

Elsawy

2013

Geosynthetics International

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Construction of embankments on soft natural soil may be a challenge, owing to its low shear strength and high compressibility. Stone columns, which depend on lateral support from the soft ground, have been utilised to accelerate foundation consolidation, and to increase foundation bearing capacity. To keep the drainage function, and to improve the stone columns as reinforcing elements, geosynthetics are used for column encasement. In this research, the behaviour of full-scale unreinforced and reinforced Bremerhaven clay with conventional and geogrid-encased stone columns under embankment loads is analysed numerically. The consolidation analysis is applied to investigate the long-term behaviour of the clay. The results show that the stone columns in the Bremerhaven clay increase the bearing capacity and accelerate the reduction of excess pore water pressure of the foundation. Once the stone columns are encased, more improvement occurs in their performance in soft soil. The analyses also indicate that stress concentration generation in the stone columns contributes significantly to the acceleration of soil consolidation.

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Centrifuge modeling of ground improvement under embankments

Cited by 3 publications

References 8 publications

Load-Settlement Characteristics of Stone Column Reinforced Soft Marine Clay Deposit: Combined Field and Numerical Studies

Load-Settlement Characteristics of Stone Column Reinforced Soft Marine Clay Deposit: Combined Field and Numerical Studies

Monitoring of embankment construction processes

Behaviour of soft ground improved by conventional and geogrid-encased stone columns, based on FEM study

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