The Experts below are selected from a list of 4236 Experts worldwide ranked by ideXlab platform
Gopal S. P. Madabhushi - One of the best experts on this subject based on the ideXlab platform.
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Seismic behaviour of soft clay and its influence on the response of Friction Pile foundations
Bulletin of Earthquake Engineering, 2019Co-Authors: Thejesh Kumar Garala, Gopal S. P. MadabhushiAbstract:In recent years, much of the research in geotechnical earthquake engineering has focused on liquefaction of loose, saturated sands and silts. However, the dynamic behaviour of soft, clayey soils and their interaction with Pile foundations during the earthquakes have received relatively little attention. In this study, an attempt is made to investigate the dynamic behaviour of soft clay and its interaction with Pile foundations during earthquakes using high gravity centrifuge testing. A model single Pile and two sets of 3 × 1 row model Pile groups with different Pile spacing were embedded in soft kaolin clay and tested under the action of model earthquakes at 50 times the earth’s gravity. The strength and stiffness of clay were evaluated using a T-bar test and an air hammer device respectively. The focus of this research is to investigate the dynamic response of Friction Piles in soft clay. However, this depends on the dynamic response of the soft clay layer around the Pile. To this end, one-dimensional ground response analysis was performed using DEEPSOIL software to emphasise the importance of non-linear analysis in characterising the seismic behaviour of soft clays. It will be shown that clay response depends both on the earthquake intensity and the shear strength and stiffness of the clay layer. This has a direct bearing on the response of single Piles and Pile groups, with larger amplification occurring for small intensity earthquakes and attenuation occurring for stronger earthquakes.
Thejesh Kumar Garala - One of the best experts on this subject based on the ideXlab platform.
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Seismic behaviour of soft clay and its influence on the response of Friction Pile foundations
Bulletin of Earthquake Engineering, 2019Co-Authors: Thejesh Kumar Garala, Gopal S. P. MadabhushiAbstract:In recent years, much of the research in geotechnical earthquake engineering has focused on liquefaction of loose, saturated sands and silts. However, the dynamic behaviour of soft, clayey soils and their interaction with Pile foundations during the earthquakes have received relatively little attention. In this study, an attempt is made to investigate the dynamic behaviour of soft clay and its interaction with Pile foundations during earthquakes using high gravity centrifuge testing. A model single Pile and two sets of 3 × 1 row model Pile groups with different Pile spacing were embedded in soft kaolin clay and tested under the action of model earthquakes at 50 times the earth’s gravity. The strength and stiffness of clay were evaluated using a T-bar test and an air hammer device respectively. The focus of this research is to investigate the dynamic response of Friction Piles in soft clay. However, this depends on the dynamic response of the soft clay layer around the Pile. To this end, one-dimensional ground response analysis was performed using DEEPSOIL software to emphasise the importance of non-linear analysis in characterising the seismic behaviour of soft clays. It will be shown that clay response depends both on the earthquake intensity and the shear strength and stiffness of the clay layer. This has a direct bearing on the response of single Piles and Pile groups, with larger amplification occurring for small intensity earthquakes and attenuation occurring for stronger earthquakes.
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Seismic behaviour of soft clay and its influence on the response of Friction Pile foundations
Springer Nature, 2019Co-Authors: Thejesh Kumar Garala, Madabhushi GspAbstract:© 2018, The Author(s). In recent years, much of the research in geotechnical earthquake engineering has focused on liquefaction of loose, saturated sands and silts. However, the dynamic behaviour of soft, clayey soils and their interaction with Pile foundations during the earthquakes have received relatively little attention. In this study, an attempt is made to investigate the dynamic behaviour of soft clay and its interaction with Pile foundations during earthquakes using high gravity centrifuge testing. A model single Pile and two sets of 3 × 1 row model Pile groups with different Pile spacing were embedded in soft kaolin clay and tested under the action of model earthquakes at 50 times the earth’s gravity. The strength and stiffness of clay were evaluated using a T-bar test and an air hammer device respectively. The focus of this research is to investigate the dynamic response of Friction Piles in soft clay. However, this depends on the dynamic response of the soft clay layer around the Pile. To this end, one-dimensional ground response analysis was performed using DEEPSOIL software to emphasise the importance of non-linear analysis in characterising the seismic behaviour of soft clays. It will be shown that clay response depends both on the earthquake intensity and the shear strength and stiffness of the clay layer. This has a direct bearing on the response of single Piles and Pile groups, with larger amplification occurring for small intensity earthquakes and attenuation occurring for stronger earthquakes
Zhengzhou Chen - One of the best experts on this subject based on the ideXlab platform.
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bearing capacity and settlement of concrete cored dcm Pile in soft ground
Geotechnical and Geological Engineering, 2004Co-Authors: Ping Dong, Zhengzhou ChenAbstract:A new kind of composite Pile named Concrete-cored DCM (Deep-Cement-Mixing) Pile is introduced for supporting medium loads in soft clay ground. This composite Pile is composed of an inner precast concrete Pile and an external DCM Pile socket, where the high strength concrete Pile is designed to bear the load of building, and DCM Pile socket acts to transfer axial force into the surrounding soils by skin Frictions. In this paper we introduce its application in soft ground, and tentatively investigated its bearing capacity and settlement using static loading tests and Finite Element Method. Our study indicates that concrete-cored DCM Pile acts as a Friction Pile and is an economical and effective method for settlement control and capacity improvement in soft clay ground. This study is also valuable for research on the mechanism of other composite Piles.
Wun-tao Wei - One of the best experts on this subject based on the ideXlab platform.
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Numerical investigation of Pile-head load effects on the negative skin Friction development of a single Pile in consolidating ground
Acta Geotechnica, 2021Co-Authors: Jiunn-shyang Chiou, Wun-tao WeiAbstract:This study conducted parametric analyses to investigate the influence of structural loading (Pile-head loading) on the development of negative skin Friction in Friction single Piles and Friction-end-bearing single Piles in consolidating ground. Numerical effective stress-based mechanical-flow analysis models were built in ABAQUS software. The appropriateness of the modeling approach was verified by applying it to simulate a field model test described in the literature. For small surcharges, Pile-head loading considerably reduces the depth of the neutral plane and therefore drag load for the Friction Pile. Under the same Pile-head loads, the reduction in total drag load for the Friction-end-bearing Pile is smaller than that for the Friction Pile. However, when the Friction-end-bearing Pile is subjected to larger Pile-head loads, the degree of total drag load reduction is comparable to that of the Friction Pile. Considerable Pile-head displacement occurs under the combined action of Pile-head and surcharge loadings. In contrast to the Friction Pile, the Friction-end-bearing Pile, because of the greater stiffness and strength of its bearing stratum, exhibits a significant reduction in negative skin Friction, no bearing failure, and a smaller Pile-head displacement when it is subjected to large Pile-head loading.
Ping Dong - One of the best experts on this subject based on the ideXlab platform.
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bearing capacity and settlement of concrete cored dcm Pile in soft ground
Geotechnical and Geological Engineering, 2004Co-Authors: Ping Dong, Zhengzhou ChenAbstract:A new kind of composite Pile named Concrete-cored DCM (Deep-Cement-Mixing) Pile is introduced for supporting medium loads in soft clay ground. This composite Pile is composed of an inner precast concrete Pile and an external DCM Pile socket, where the high strength concrete Pile is designed to bear the load of building, and DCM Pile socket acts to transfer axial force into the surrounding soils by skin Frictions. In this paper we introduce its application in soft ground, and tentatively investigated its bearing capacity and settlement using static loading tests and Finite Element Method. Our study indicates that concrete-cored DCM Pile acts as a Friction Pile and is an economical and effective method for settlement control and capacity improvement in soft clay ground. This study is also valuable for research on the mechanism of other composite Piles.
