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Author(s):	Abramova, Anna; Schneider, Wilfried; Maximov, German
Title:	Kombination von Ultraschall- und Druckwellenverfahren zur innovativen Regenerierung von Brunnen
Abstract:	Die Effektivität von Brunnenregenerierungen kann dadurch gesteigert werden, dass Ultraschall- und Druckwellenverfahren kombiniert angewandt werden. Durch theoretische Analysen wird gezeigt, dass die Wirktiefen der beiden Verfahren unterschiedlich sind. Während das Ultraschallverfahren stark im Bereich des Brunnenfilters wirkt, reicht die Wirkung des Druckwellenverfahrens in den Kiesfilter bis zur Bohrlochwand sowie in den angrenzenden Grundwasserleiter hinein. Die Verbreitung der Signale in der Brunnenumgebung wurde numerisch modelliert. Durch diese theoretischen Analysen, verknüpft mit Experimenten im Labor und Gelände, konnte bewiesen werden, dass durch die Verfahrenskombination höhere Wirkungsgrade bei der Brunnenregenerierung erreicht werden können, als bei der alleinigen Anwendung von Ultraschall. Combination of ultrasound and shockwaves for innovative regeneration of wells. The effectiveness of regeneration of wells can be enhanced if ultrasound and shockwaves are used during the same treatment. It is theoretically shown that the two methods have different depths of impact. Whereas the ultrasonic method has a strong impact on the area of the well screen, the impact of the shock waves is focused on the gavel pack, the wall of the well and the adjacent aquifer. The propagation of the signals in the formation near the well was modeled numerical. By a theoretical analysis combined with experiments in lab and field it was proven that the regeneration of wells using a combination of ultrasound and shockwaves is much more effective than the regeneration by means of ultrasound only.
Source:	geotechnik 37 (2014), No. 1
Page/s:	40-46
Language of Publication:	German

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