Análisis experimental de la erosión interna de suelos
Seepage flow through the ground can cause the movement of soil particles, creating an erosive process of detachment and transport of material that can lead to failure. There are three different processes of internal erosion: Suffusion, piping and liquefaction. The focus of this research is suffusion...
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| Tipo de recurso: | tesis de maestría |
| Fecha de publicación: | 2020 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | español |
| OAI Identifier: | oai:upcommons.upc.edu:2117/341769 |
| Acceso en línea: | https://hdl.handle.net/2117/341769 |
| Access Level: | acceso abierto |
| Palabra clave: | Soil erosion Soils--Testing Sòls -- Erosió Sòls -- Assaigs Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòls |
| Sumario: | Seepage flow through the ground can cause the movement of soil particles, creating an erosive process of detachment and transport of material that can lead to failure. There are three different processes of internal erosion: Suffusion, piping and liquefaction. The focus of this research is suffusion, a non-localised phenomenon where the finest particles are transported through the voids of the solid skeleton. The research also focusses on“piping”, a phenomenon where due to flow the hydraulic conductivity locally increases and facilitates the transport of the finest particles, which in turn speeds up the process of erosion, leading to the development of an erosion channel in the flow direction (Beber et al., 2019). The susceptibility of materials to internal erosion in presence of water flow is a topic of great geotechnical interest because large civil constructions can be damaged by erosion with potentially large economic and social consequences due to the failure of dikes and dams. Nowadays, laws of the start, transport and evolution of erosion are not well described. Similarly, suffusion, a phenomenon in which the failure mechanism is not well understood, can be difficult to detect and therefore prevent the collapse of structures. These difficulties make it necessary to define geotechnical parameters that guarantee the internal stability of these structures, as a way to control stability of dams and embankments. In this study, experimental “pinhole” erosion tests will be performed in bimodal clay soils, where the erosion in presence of horizontal flow will be analyzed. The soils will then be characterized based on their density and porosity and the applied hydraulic gradient will be controlled. This research studies the following results: the concentration of eroded mass in the flow, erosion rate and flow rate. Emphasis is placed on the difference between the possible erosion mechanisms, as well as on how the process of each one occurs. The possibilities of modelling in each case will be mentioned. Finally, the influence of the internal structure of the voids on the measured results is discussed. |
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