Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Temporal evolution of backward erosion piping in small-scale experiments
https://orcid.org/http://orcid.org/0000-0001-6895-8256
https://orcid.org/http://orcid.org/0000-0002-9096-3358
https://orcid.org/http://orcid.org/0000-0002-8765-3439
https://orcid.org/http://orcid.org/0000-0002-4758-1450
https://orcid.org/http://orcid.org/0000-0003-0162-8281
Backward erosion piping (BEP) is a form of internal erosion which can lead to failure of levees and dams. Most research focused on the critical head difference at which piping failure occurs. Two aspects have received less attention, namely (1) the temporal evolution of piping and (2) the local hydraulic conditions in the pipe and at the pipe tip. We present small-scale experiments with local pressure measurements in the pipe during equilibrium and pipe progression for different sands and degrees of hydraulic loading. The experiments confirm a positive relation between progression rate and grain size as well as the degree of hydraulic overloading. Furthermore, the analysis of local hydraulic conditions shows that the rate of BEP progression can be better explained by the bed shear stress and sediment transport in the pipe than by the seepage velocity at the pipe tip. The experiments show how different processes contribute to the piping process and these insights provide a first empirical basis for modeling pipe development using coupled seepage-sediment transport equations.
Temporal evolution of backward erosion piping in small-scale experiments
https://orcid.org/http://orcid.org/0000-0001-6895-8256
https://orcid.org/http://orcid.org/0000-0002-9096-3358
https://orcid.org/http://orcid.org/0000-0002-8765-3439
https://orcid.org/http://orcid.org/0000-0002-4758-1450
https://orcid.org/http://orcid.org/0000-0003-0162-8281
Backward erosion piping (BEP) is a form of internal erosion which can lead to failure of levees and dams. Most research focused on the critical head difference at which piping failure occurs. Two aspects have received less attention, namely (1) the temporal evolution of piping and (2) the local hydraulic conditions in the pipe and at the pipe tip. We present small-scale experiments with local pressure measurements in the pipe during equilibrium and pipe progression for different sands and degrees of hydraulic loading. The experiments confirm a positive relation between progression rate and grain size as well as the degree of hydraulic overloading. Furthermore, the analysis of local hydraulic conditions shows that the rate of BEP progression can be better explained by the bed shear stress and sediment transport in the pipe than by the seepage velocity at the pipe tip. The experiments show how different processes contribute to the piping process and these insights provide a first empirical basis for modeling pipe development using coupled seepage-sediment transport equations.
Temporal evolution of backward erosion piping in small-scale experiments
https://orcid.org/http://orcid.org/0000-0001-6895-8256
https://orcid.org/http://orcid.org/0000-0002-9096-3358
https://orcid.org/http://orcid.org/0000-0002-8765-3439
https://orcid.org/http://orcid.org/0000-0002-4758-1450
https://orcid.org/http://orcid.org/0000-0003-0162-8281
Backward erosion piping (BEP) is a form of internal erosion which can lead to failure of levees and dams. Most research focused on the critical head difference at which piping failure occurs. Two aspects have received less attention, namely (1) the temporal evolution of piping and (2) the local hydraulic conditions in the pipe and at the pipe tip. We present small-scale experiments with local pressure measurements in the pipe during equilibrium and pipe progression for different sands and degrees of hydraulic loading. The experiments confirm a positive relation between progression rate and grain size as well as the degree of hydraulic overloading. Furthermore, the analysis of local hydraulic conditions shows that the rate of BEP progression can be better explained by the bed shear stress and sediment transport in the pipe than by the seepage velocity at the pipe tip. The experiments show how different processes contribute to the piping process and these insights provide a first empirical basis for modeling pipe development using coupled seepage-sediment transport equations.
Temporal evolution of backward erosion piping in small-scale experiments
Acta Geotech.
Pol, Johannes C. (Autor:in) / Kanning, Willem (Autor:in) / van Beek, Vera M. (Autor:in) / Robbins, Bryant A. (Autor:in) / Jonkman, Sebastiaan N. (Autor:in)
Acta Geotechnica ; 17 ; 4555-4576
01.10.2022
22 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Backward erosion piping , Dams , Experiments , Laminar sediment transport , Levees , Progression rate Engineering , Geoengineering, Foundations, Hydraulics , Solid Mechanics , Geotechnical Engineering & Applied Earth Sciences , Soil Science & Conservation , Soft and Granular Matter, Complex Fluids and Microfluidics
Analysis of the pipe depth development in small-scale backward erosion piping experiments
| Springer Verlag | 2018
| Wiley | 2013
Analysis of the pipe depth development in small-scale backward erosion piping experiments
| Online Contents | 2018
| Taylor & Francis Verlag | 2011