Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Observation of Piping Erosion Initiation in a Centrifuge Model
A series of upward flow tests in sandy soil models with similar geometry have been performed to provide new insights into the physical modeling of piping erosion. The tests were performed by increasing the differential head across the models until total heave occurred. To assess the centrifuge scaling effects, several tests were conducted at different gravitational accelerations. Observations of the pressure loss in different sections of the specimens demonstrated that the erosion initiates with progressive loosening of the soil near the surface and then advances downward before total heave occurs. Although the process was similar in all tests, visual observation showed that the thickness of loosened zone before total heave decreased as the gravity increased. The critical hydraulic gradient required to initiate piping erosion was found to increase linearly with the gravitational acceleration. Hence, a linear scaling factor was estimated for models with the same grain size and model size.
Observation of Piping Erosion Initiation in a Centrifuge Model
A series of upward flow tests in sandy soil models with similar geometry have been performed to provide new insights into the physical modeling of piping erosion. The tests were performed by increasing the differential head across the models until total heave occurred. To assess the centrifuge scaling effects, several tests were conducted at different gravitational accelerations. Observations of the pressure loss in different sections of the specimens demonstrated that the erosion initiates with progressive loosening of the soil near the surface and then advances downward before total heave occurs. Although the process was similar in all tests, visual observation showed that the thickness of loosened zone before total heave decreased as the gravity increased. The critical hydraulic gradient required to initiate piping erosion was found to increase linearly with the gravitational acceleration. Hence, a linear scaling factor was estimated for models with the same grain size and model size.
Observation of Piping Erosion Initiation in a Centrifuge Model
Ovalle-Villamil, William (Autor:in) / Sasanakul, Inthuorn (Autor:in)
Eighth International Conference on Case Histories in Geotechnical Engineering ; 2019 ; Philadelphia, Pennsylvania
Geo-Congress 2019 ; 97-106
21.03.2019
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Observation of Piping Erosion Initiation in a Centrifuge Model
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