Characterization of internal erosion in sand kaolin soils. Experimental study
| Autor: | F. Rosquoet, Didier Marot, Fateh Bendahmane, Alain Alexis |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Piping
education Flow (psychology) 0211 other engineering and technologies 02 engineering and technology 010502 geochemistry & geophysics 01 natural sciences Erosion rate Filter (large eddy simulation) Hydraulic head Particle-size distribution Kaolinite Internal erosion General Earth and Planetary Sciences Geotechnical engineering Geology 021101 geological & geomatics engineering 0105 earth and related environmental sciences General Environmental Science |
| Zdroj: | Revue européenne de génie civil. 10:505-520 |
| ISSN: | 1774-7120 |
| Popis: | The appearance of breaches in recent hydraulic earthstructures due to internal erosion confirms that improving our physical understanding of the phenomenon is urgent. Under the effect of internal flows, earthstructures can undergo a migration of their particles, which modifies the particle size distribution and affects both hydraulic and mechanical characteristics. This paper initially presents a parametric study conducted on sand/kaolin samples. The experimental device described here consists of three modified triaxial cells used to control sample confinement, prevent any parasitic flow and survey sample large deformations. The tests reveal that internal erosion (suffusion or piping) is initiated by the transport of clay particles. The erosion rate, then, depends on the values of the different parameters considered (hydraulic gradient, clay content and filter pore opening size). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|