ABSTRACT
The article describes the development of technologies for concrete delivery applied on an underground power plant under construction. Objectives: to show performing equipment and flexible systems to deliver high quantities of concrete even in underground spaces reducing consumptions and emissions, minimizing interferences with other processes. The Kühtai storage power plant is an infrastructure being constructed in Silz, Tyrol, Austria. The Kühtai pumped-storage power project involves the construction of an underground power plant, a dam for a new reservoir, and a water diversion gallery with six water intakes. The underground power plant will be equipped with two reversible spiral Francis pump-turbine units. The cavern excavated for this purpose is located at a depth of 174 m below the surface. The cavern has connections to the outside via an access tunnel and a drainage tunnel. Austrian utility company Tiroler Wasserkraft (Tiwag) is developing the facility with an estimated investment of €1bn.
