Radhey Sharma | West Virginia University (original) (raw)
Papers by Radhey Sharma
Géotechnique
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Géotechnique, 2003
The paper presents an elasto-plastic model for unsaturated soils that takes explicitly into accou... more The paper presents an elasto-plastic model for unsaturated soils that takes explicitly into account the mechanisms with which suction affects mechanical behaviour as well as their dependence on degree of saturation. The proposed model is formulated in terms of two constitutive variables directly related to these suction mechanisms: the average skeleton stress, which includes the average fluid pressure acting on the soil pores, and an additional scalar constitutive variable, ξ, related to the magnitude of the bonding effect exerted by meniscus water at the inter-particle contacts. The formulation of the model in terms of variables closely related to specific behaviour mechanisms leads to a remarkable unification of experimental results of tests carried out with different suctions. The analysis of experimental isotropic compression data strongly suggests that the quotient between the void ratio, e, of an unsaturated soil and the void ratio es, corresponding to the saturated state at t...
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Geotechnique, 2004
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Hurricane Irma affected the Florida peninsula from September 9-11, 2017, with high winds, rainfal... more Hurricane Irma affected the Florida peninsula from September 9-11, 2017, with high winds, rainfall, and storm surge. Although the storm made landfall on the west coast of Florida, impacts of the rainfall and storm surge affected central and northeast Florida. A GEER team mobilized on September 23, 2017, spent three days documenting sinkhole damage in central Florida, coastal scour and erosion along the northeast coast of Florida, and infrastructure damage in northeast Florida. Numerous sites with geotechnical damage were documented but this case history focuses specifically on sinkhole damage in The Villages, erosion and scour at Vilano Beach, failure of a concrete cover earth dam at Hampton Lake, and bridge embankment damage on US-17 over the Trout River. The most notable challenges to reconnaissance were the widespread and varied nature of the damages from Hurricane Irma and the rapid repair of damaged infrastructure that required the team to work closely with local, state, and fe...
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Geotechnique, Jan 3, 2003
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Journal of Testing and Evaluation, 2015
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GeoCongress 2008, 2008
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Advances in Unsaturated Soil, Seepage, and Environmental Geotechnics, 2006
Developments in Measurement of Volume Change in Triaxial Testing of Unsaturated Soils. [ASCE Conf... more Developments in Measurement of Volume Change in Triaxial Testing of Unsaturated Soils. [ASCE Conference Proceedings 192, 8 (2006)]. Radhey S. Sharma, Longjie Hong, Sonal Singhal. Abstract. Unsaturated soils comprise ...
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Sound Geotechnical Research to Practice, 2013
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Construction and Building Materials, 2014
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Unsaturated Soils 2006, 2006
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Characterization, Mechanisms, Simulation, and Modeling, 2008
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Soils and Foundations, 2013
ABSTRACT This research was performed to investigate the behavior of geosynthetic-reinforced sandy... more ABSTRACT This research was performed to investigate the behavior of geosynthetic-reinforced sandy soil foundations and to study the effect of different parameters contributing to their performance using laboratory model tests. The parameters investigated in this study included top layer spacing, number of reinforcement layers, vertical spacing between layers, tensile modulus and type of geosynthetic reinforcement, embedment depth, and shape of footing. The effect of geosynthetic reinforcement on the vertical stress distribution in the sand and the strain distribution along the reinforcement were also investigated. The test results demonstrated the potential benefit of using geosynthetic-reinforced sand foundations. The test results also showed that the reinforcement configuration/layout has a very significant effect on the behavior of reinforced sand foundation. With two or more layers of reinforcement, the settlement can be reduced by 20% at all footing pressure levels. Sand reinforced by the composite of geogrid and geotextile performed better than those reinforced by geogrid or geotextile alone. The inclusion of reinforcement can redistribute the applied footing load to a more uniform pattern, hence reducing the stress concentration, which will result reduced settlement. Finally, the results of model tests were compared with the analytical solution developed by the authors in previous studies; and the analytical solution gave a good predication of the experimental results of footing on geosynthetic reinforced sand.
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GeoCongress 2008, 2008
This research study aims at investigating the behavior of spread footings on reinforced crushed l... more This research study aims at investigating the behavior of spread footings on reinforced crushed limestone using laboratory model tests. The model tests were conducted inside a steel box with dimensions of 1.5 m (length) × 0.91 m (width) × 0.91 m (height) using a steel plate with ...
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Recent Advances in Characterization and Treatment, 2006
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Different earth materials, such as soil and rock, are used in the construction of geotechnical sy... more Different earth materials, such as soil and rock, are used in the construction of geotechnical systems including foundations, retaining walls, embankments and road pavements and air-field pavements. Often site soils are unacceptable for the intended function and must be replaced with better quality materials or improved. One method of improvement is to mix high quality site materials with lesser quality site materials to provide an acceptable soil material. In Iowa, materials for earthwork construction are classified, based on their suitability, as: select, suitable, and unsuitable soils. In this study, three unsuitable soils were mixed with one select soil at various proportions (unsuitable : select = 25%:75%, 50%:50% and 75%:25%) to investigate how the engineering properties can be improved at different select-unsuitable ratios and evaluate the potential of using the blends at various embankment layers. Experimental results indicate that resulting blends are for the most part acce...
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Transportation Research Record: Journal of the Transportation Research Board, 2007
The behavior of foundations on geosynthetic-reinforced clayey soil of low to medium plasticity us... more The behavior of foundations on geosynthetic-reinforced clayey soil of low to medium plasticity using laboratory model footing tests was investigated. The model footing was made of a steel plate with dimensions of 152 mm (6 in.) × 152 mm (6 in.). The parameters investigated in this study included the top layer spacing, the number of reinforcement layers, the vertical spacing between layers, and the stiffness and type of reinforcement. The effect of reinforcement on the vertical stress distribution in the clay and the strain distribution along the reinforcement were also investigated. The test results showed that the inclusion of reinforcement could significantly improve the soil's bearing capacity and reduce the footing settlement. With three or more layers of reinforcement, the settlement could be reduced by approximately 50% at a relatively medium surface pressure. The geogrids with higher stiffness performed better than geogrids with lower stiffness. The test results also show...
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Journal of Geotechnical and Geoenvironmental Engineering, 2004
This note presents a study of the efficacy of fly ash as an additive in improving the engineering... more This note presents a study of the efficacy of fly ash as an additive in improving the engineering characteristics of expansive soils. An experimental program has evaluated the effect of the fly ash content on the free swell index, swell potential, swelling pressure, plasticity, ...
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Géotechnique
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Géotechnique, 2003
The paper presents an elasto-plastic model for unsaturated soils that takes explicitly into accou... more The paper presents an elasto-plastic model for unsaturated soils that takes explicitly into account the mechanisms with which suction affects mechanical behaviour as well as their dependence on degree of saturation. The proposed model is formulated in terms of two constitutive variables directly related to these suction mechanisms: the average skeleton stress, which includes the average fluid pressure acting on the soil pores, and an additional scalar constitutive variable, ξ, related to the magnitude of the bonding effect exerted by meniscus water at the inter-particle contacts. The formulation of the model in terms of variables closely related to specific behaviour mechanisms leads to a remarkable unification of experimental results of tests carried out with different suctions. The analysis of experimental isotropic compression data strongly suggests that the quotient between the void ratio, e, of an unsaturated soil and the void ratio es, corresponding to the saturated state at t...
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Geotechnique, 2004
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Hurricane Irma affected the Florida peninsula from September 9-11, 2017, with high winds, rainfal... more Hurricane Irma affected the Florida peninsula from September 9-11, 2017, with high winds, rainfall, and storm surge. Although the storm made landfall on the west coast of Florida, impacts of the rainfall and storm surge affected central and northeast Florida. A GEER team mobilized on September 23, 2017, spent three days documenting sinkhole damage in central Florida, coastal scour and erosion along the northeast coast of Florida, and infrastructure damage in northeast Florida. Numerous sites with geotechnical damage were documented but this case history focuses specifically on sinkhole damage in The Villages, erosion and scour at Vilano Beach, failure of a concrete cover earth dam at Hampton Lake, and bridge embankment damage on US-17 over the Trout River. The most notable challenges to reconnaissance were the widespread and varied nature of the damages from Hurricane Irma and the rapid repair of damaged infrastructure that required the team to work closely with local, state, and fe...
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Geotechnique, Jan 3, 2003
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Journal of Testing and Evaluation, 2015
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GeoCongress 2008, 2008
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Advances in Unsaturated Soil, Seepage, and Environmental Geotechnics, 2006
Developments in Measurement of Volume Change in Triaxial Testing of Unsaturated Soils. [ASCE Conf... more Developments in Measurement of Volume Change in Triaxial Testing of Unsaturated Soils. [ASCE Conference Proceedings 192, 8 (2006)]. Radhey S. Sharma, Longjie Hong, Sonal Singhal. Abstract. Unsaturated soils comprise ...
Bookmarks Related papers MentionsView impact
Sound Geotechnical Research to Practice, 2013
Bookmarks Related papers MentionsView impact
Construction and Building Materials, 2014
Bookmarks Related papers MentionsView impact
Unsaturated Soils 2006, 2006
Bookmarks Related papers MentionsView impact
Characterization, Mechanisms, Simulation, and Modeling, 2008
Bookmarks Related papers MentionsView impact
Soils and Foundations, 2013
ABSTRACT This research was performed to investigate the behavior of geosynthetic-reinforced sandy... more ABSTRACT This research was performed to investigate the behavior of geosynthetic-reinforced sandy soil foundations and to study the effect of different parameters contributing to their performance using laboratory model tests. The parameters investigated in this study included top layer spacing, number of reinforcement layers, vertical spacing between layers, tensile modulus and type of geosynthetic reinforcement, embedment depth, and shape of footing. The effect of geosynthetic reinforcement on the vertical stress distribution in the sand and the strain distribution along the reinforcement were also investigated. The test results demonstrated the potential benefit of using geosynthetic-reinforced sand foundations. The test results also showed that the reinforcement configuration/layout has a very significant effect on the behavior of reinforced sand foundation. With two or more layers of reinforcement, the settlement can be reduced by 20% at all footing pressure levels. Sand reinforced by the composite of geogrid and geotextile performed better than those reinforced by geogrid or geotextile alone. The inclusion of reinforcement can redistribute the applied footing load to a more uniform pattern, hence reducing the stress concentration, which will result reduced settlement. Finally, the results of model tests were compared with the analytical solution developed by the authors in previous studies; and the analytical solution gave a good predication of the experimental results of footing on geosynthetic reinforced sand.
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GeoCongress 2008, 2008
This research study aims at investigating the behavior of spread footings on reinforced crushed l... more This research study aims at investigating the behavior of spread footings on reinforced crushed limestone using laboratory model tests. The model tests were conducted inside a steel box with dimensions of 1.5 m (length) × 0.91 m (width) × 0.91 m (height) using a steel plate with ...
Bookmarks Related papers MentionsView impact
Recent Advances in Characterization and Treatment, 2006
Bookmarks Related papers MentionsView impact
Different earth materials, such as soil and rock, are used in the construction of geotechnical sy... more Different earth materials, such as soil and rock, are used in the construction of geotechnical systems including foundations, retaining walls, embankments and road pavements and air-field pavements. Often site soils are unacceptable for the intended function and must be replaced with better quality materials or improved. One method of improvement is to mix high quality site materials with lesser quality site materials to provide an acceptable soil material. In Iowa, materials for earthwork construction are classified, based on their suitability, as: select, suitable, and unsuitable soils. In this study, three unsuitable soils were mixed with one select soil at various proportions (unsuitable : select = 25%:75%, 50%:50% and 75%:25%) to investigate how the engineering properties can be improved at different select-unsuitable ratios and evaluate the potential of using the blends at various embankment layers. Experimental results indicate that resulting blends are for the most part acce...
Bookmarks Related papers MentionsView impact
Transportation Research Record: Journal of the Transportation Research Board, 2007
The behavior of foundations on geosynthetic-reinforced clayey soil of low to medium plasticity us... more The behavior of foundations on geosynthetic-reinforced clayey soil of low to medium plasticity using laboratory model footing tests was investigated. The model footing was made of a steel plate with dimensions of 152 mm (6 in.) × 152 mm (6 in.). The parameters investigated in this study included the top layer spacing, the number of reinforcement layers, the vertical spacing between layers, and the stiffness and type of reinforcement. The effect of reinforcement on the vertical stress distribution in the clay and the strain distribution along the reinforcement were also investigated. The test results showed that the inclusion of reinforcement could significantly improve the soil's bearing capacity and reduce the footing settlement. With three or more layers of reinforcement, the settlement could be reduced by approximately 50% at a relatively medium surface pressure. The geogrids with higher stiffness performed better than geogrids with lower stiffness. The test results also show...
Bookmarks Related papers MentionsView impact
Journal of Geotechnical and Geoenvironmental Engineering, 2004
This note presents a study of the efficacy of fly ash as an additive in improving the engineering... more This note presents a study of the efficacy of fly ash as an additive in improving the engineering characteristics of expansive soils. An experimental program has evaluated the effect of the fly ash content on the free swell index, swell potential, swelling pressure, plasticity, ...
Bookmarks Related papers MentionsView impact