Piezometric measurements in the core of dams made of moraines reveal that pore pressure dissipation mainly occurs near the downstream face of the cores, probably due to the lack of granulometric stability of these materials during seepage flow. To analyse this phenomenon, conventional criteria defining susceptibility to suffusion are first recalled and applied to the moraine materials composing the S. Valentino (Italy) and Suorva (Sweden) dams. An original numerical procedure to simulate the particle migration phenomena in granular media due to seepage processes is then reported. Effects of deposition–erosion processes occurred in the moraine materials composing the S. Valentino and Suorva dams, at the interface core–granular transition, have been then simulated and interpreted: the tolerable malfunctions (higher free surface profile and pore pressures) in the core of the S. Valentino dam and the failures at Suorva dams
Federico, F., Montanaro, A. (2012). Granulometric stability of moraine embankment dam materials. INTERNATIONAL WATER POWER & DAM CONSTRUCTION.
Granulometric stability of moraine embankment dam materials
FEDERICO, FRANCESCO;
2012-01-01
Abstract
Piezometric measurements in the core of dams made of moraines reveal that pore pressure dissipation mainly occurs near the downstream face of the cores, probably due to the lack of granulometric stability of these materials during seepage flow. To analyse this phenomenon, conventional criteria defining susceptibility to suffusion are first recalled and applied to the moraine materials composing the S. Valentino (Italy) and Suorva (Sweden) dams. An original numerical procedure to simulate the particle migration phenomena in granular media due to seepage processes is then reported. Effects of deposition–erosion processes occurred in the moraine materials composing the S. Valentino and Suorva dams, at the interface core–granular transition, have been then simulated and interpreted: the tolerable malfunctions (higher free surface profile and pore pressures) in the core of the S. Valentino dam and the failures at Suorva damsFile | Dimensione | Formato | |
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