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Author(s):	Tergl, M.
Title:	Kops II pumped storage works: construction contract 3 ? machine caverns / Pumpspeicherwerk Kops II: Baulos 3 - Maschinenkaverne
Abstract:	125,000 m³ of excavation were completed in only 14 months, between October 2004 and December 2005, for the powerhouse and transformer caverns. The excavation of the shafts and tunnels - altogether 1,782 m - was undertaken parallel to the excavation of the caverns with a total volume of 78,000 m³. The internal construction works were also remarkable. From December 2005 to May 2007, which is a period of only 1.5 years, 48,000 m³ of concrete were placed in the caverns. The multitude of linings and backfill concreting in the tunnels, shafts and other subsidiary works were constructed at the same time as the concrete work in the caverns. This extraordinary performance was only possible through intensive preparation work, continuing during the construction phase, and the involvement of specialists. At peak times, 130 skilled construction workers were employed on the site. All works were carried out in continuous operation with day and night shifts. The only interruption was for the traditional Christmas and Easter holidays. Von Oktober 2004 bis Dezember 2005, also in 14 Monaten, wurden in der Maschinen- und Trafokaverne insgesamt 125.000 m³ Ausbruch bewältigt. Die Ausbrüche für die Stollen und Schächte - insgesamt 1.782 m - liefen parallel zum Ausbruch der Kavernen und hatten ein Volumen von 78.000 m³. Die Leistungen beim Innenausbau waren ebenfalls beachtenswert. So wurden von Dezember 2005 bis Mai 2007, also in einem Zeitraum von nur 1,5 Jahren, in der Kaverne 48.000 m³ Beton eingebaut. Die zahlreichen Auskleidungen und Hinterbetonierungen in den Stollen, Schächten und sonstigen Nebenanlagen wurden gleichzeitig mit den Betonarbeiten in der Kaverne hergestellt. Diese außergewöhnlichen Leistungen waren nur durch eine intensive, baubegleitende Arbeitsvorbereitung und den Einsatz von Spezialisten möglich. Zu Spitzenzeiten waren rund 130 Facharbeiter auf der Baustelle beschäftigt. Sämtliche Arbeiten wurden in Tag- und Nachtschicht im Durchlaufbetrieb ausgeführt. Die einzige Unterbrechung bildeten traditionsgemäß die Weihnachts- und die Osterferien.
Source:	Geomechanics and Tunnelling 2 (2009), No. 1
Page/s:	105-114
Language of Publication:	English/German

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