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Dynamic behavior of EPS amended lightweight soil under cyclic loading
https://orcid.org/0000-0001-9236-6656
Abstract The dynamic behavior of expanded polystyrene (EPS) particle amended lightweight soil was explored using consolidated undrained dynamic and monotonic triaxial tests conducted on samples of lightweight soil with different mixing ratios. The dynamic stress, dynamic strain, and dynamic pore pressure time history curves, and shear strength criterion were studied. As a kind of structural soil, the dynamic strain time history curves of lightweight soil could be divided into three stages as the vibration compaction, vibration deformation and vibration failure stages according to the cumulative deformation rate of dynamic strain, but the vibration compaction stage was not obvious. The dynamic strain accumulation for lightweight soil was mainly single amplitude in compressive region. The deformation rate during the vibration failure stage for the lightweight soil was larger than that of the remolded soil owing to its increased stiffness and brittleness with added cementation. Unlike that of the remolded soil, dynamic pore pressures fluctuated markedly in lightweight soil tests. The dynamic pore pressure development of lightweight soil was found to relate to the mixing ratios of its components and the confining pressures. For lightweight soil samples with high EPS particle mixing ratio, the dynamic pore pressures remained in the positive range, increasing unsteadily with some fluctuation. However, for lower EPS content samples in different confining pressures, the dynamic pore pressure showed decreasing trends into the negative range, again changing unsteadily with fluctuation, showing a trend of suction and soil skeletal dilation. Based on analysis of results, it was determined that, general pore pressure, limit equilibrium and yield criterias were not suitable to describe the dynamic behavior of lightweight soil, while the dynamic strain criterion was suitable. Excluding the plastic deformation range, the single amplitude dynamic compression strain of 5% was recommended as the dynamic strain criterion to determine dynamic strength of lightweight soil.
Highlights Lightweight soil is a structural soil whose dynamic properties are significantly different from remolded soil. Dynamic behavior of lightweight soil are divided into vibration compaction, deformation and failure stages. Dynamic pore pressure of lightweight soil depends on the mixing ratios and confining pressure. Pore pressure, limit equilibrium and yield criteria are not applicable to describing strength of lightweight soil. Single amplitude compression strain criterion of 5% is recommended to describe strength of lightweight soil.
Dynamic behavior of EPS amended lightweight soil under cyclic loading
https://orcid.org/0000-0001-9236-6656
Abstract The dynamic behavior of expanded polystyrene (EPS) particle amended lightweight soil was explored using consolidated undrained dynamic and monotonic triaxial tests conducted on samples of lightweight soil with different mixing ratios. The dynamic stress, dynamic strain, and dynamic pore pressure time history curves, and shear strength criterion were studied. As a kind of structural soil, the dynamic strain time history curves of lightweight soil could be divided into three stages as the vibration compaction, vibration deformation and vibration failure stages according to the cumulative deformation rate of dynamic strain, but the vibration compaction stage was not obvious. The dynamic strain accumulation for lightweight soil was mainly single amplitude in compressive region. The deformation rate during the vibration failure stage for the lightweight soil was larger than that of the remolded soil owing to its increased stiffness and brittleness with added cementation. Unlike that of the remolded soil, dynamic pore pressures fluctuated markedly in lightweight soil tests. The dynamic pore pressure development of lightweight soil was found to relate to the mixing ratios of its components and the confining pressures. For lightweight soil samples with high EPS particle mixing ratio, the dynamic pore pressures remained in the positive range, increasing unsteadily with some fluctuation. However, for lower EPS content samples in different confining pressures, the dynamic pore pressure showed decreasing trends into the negative range, again changing unsteadily with fluctuation, showing a trend of suction and soil skeletal dilation. Based on analysis of results, it was determined that, general pore pressure, limit equilibrium and yield criterias were not suitable to describe the dynamic behavior of lightweight soil, while the dynamic strain criterion was suitable. Excluding the plastic deformation range, the single amplitude dynamic compression strain of 5% was recommended as the dynamic strain criterion to determine dynamic strength of lightweight soil.
Highlights Lightweight soil is a structural soil whose dynamic properties are significantly different from remolded soil. Dynamic behavior of lightweight soil are divided into vibration compaction, deformation and failure stages. Dynamic pore pressure of lightweight soil depends on the mixing ratios and confining pressure. Pore pressure, limit equilibrium and yield criteria are not applicable to describing strength of lightweight soil. Single amplitude compression strain criterion of 5% is recommended to describe strength of lightweight soil.
Dynamic behavior of EPS amended lightweight soil under cyclic loading
https://orcid.org/0000-0001-9236-6656
Abstract The dynamic behavior of expanded polystyrene (EPS) particle amended lightweight soil was explored using consolidated undrained dynamic and monotonic triaxial tests conducted on samples of lightweight soil with different mixing ratios. The dynamic stress, dynamic strain, and dynamic pore pressure time history curves, and shear strength criterion were studied. As a kind of structural soil, the dynamic strain time history curves of lightweight soil could be divided into three stages as the vibration compaction, vibration deformation and vibration failure stages according to the cumulative deformation rate of dynamic strain, but the vibration compaction stage was not obvious. The dynamic strain accumulation for lightweight soil was mainly single amplitude in compressive region. The deformation rate during the vibration failure stage for the lightweight soil was larger than that of the remolded soil owing to its increased stiffness and brittleness with added cementation. Unlike that of the remolded soil, dynamic pore pressures fluctuated markedly in lightweight soil tests. The dynamic pore pressure development of lightweight soil was found to relate to the mixing ratios of its components and the confining pressures. For lightweight soil samples with high EPS particle mixing ratio, the dynamic pore pressures remained in the positive range, increasing unsteadily with some fluctuation. However, for lower EPS content samples in different confining pressures, the dynamic pore pressure showed decreasing trends into the negative range, again changing unsteadily with fluctuation, showing a trend of suction and soil skeletal dilation. Based on analysis of results, it was determined that, general pore pressure, limit equilibrium and yield criterias were not suitable to describe the dynamic behavior of lightweight soil, while the dynamic strain criterion was suitable. Excluding the plastic deformation range, the single amplitude dynamic compression strain of 5% was recommended as the dynamic strain criterion to determine dynamic strength of lightweight soil.
Highlights Lightweight soil is a structural soil whose dynamic properties are significantly different from remolded soil. Dynamic behavior of lightweight soil are divided into vibration compaction, deformation and failure stages. Dynamic pore pressure of lightweight soil depends on the mixing ratios and confining pressure. Pore pressure, limit equilibrium and yield criteria are not applicable to describing strength of lightweight soil. Single amplitude compression strain criterion of 5% is recommended to describe strength of lightweight soil.
Dynamic behavior of EPS amended lightweight soil under cyclic loading
Hou, Tian-shun (Autor:in) / Zhou, Wei (Autor:in) / Pamukcu, Sibel (Autor:in) / Su, Jie (Autor:in)
30.04.2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Dynamic behavior of EPS amended lightweight soil under cyclic loading
| Elsevier | 2023
Dynamic Deformation Behavior and Cyclic Degradation of Ultrasoft Soil under Cyclic Loading
| British Library Online Contents | 2016
Dynamic Deformation Behavior and Cyclic Degradation of Ultrasoft Soil under Cyclic Loading
| Online Contents | 2016
Dynamic Deformation Behavior and Cyclic Degradation of Ultrasoft Soil under Cyclic Loading
| Online Contents | 2016