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60 years after building the Salza dam, operating and monitoring installations had to be renewed, respectively improved in compliance with the regulations of the authorities. The rehabilitation project was carried out in the years 2006 to 2008. The dam has now 2 bottom outlets with flat gates and a maximum outflow capacity of 76 m3/s all in all. Thus, given normal inflow (4 m3/s), the reservoir can now be emptied completely within approx. 50 hours. The maximum flood level, which, according to the new Austrian directive, is nowadays defined as HQ5000 is now 270 m3/s and has thus almost doubled compared to the original value. For these reasons the flood spillway at the dam crest had to be redesigned and a stilling basin had to be built at the dam toe, into which also the new monitoring gallery was integrated, which guarantees permanent accessibility of the monitoring installations. The monitoring system was upgraded by installing a plumb line, concrete thermometers, piezometers and drainages. The body of the dam was sealed with the help of injections and by a shell of shotcrete along parts of the upstream side.
60 years after building the Salza dam, operating and monitoring installations had to be renewed, respectively improved in compliance with the regulations of the authorities. The rehabilitation project was carried out in the years 2006 to 2008. The dam has now 2 bottom outlets with flat gates and a maximum outflow capacity of 76 m3/s all in all. Thus, given normal inflow (4 m3/s), the reservoir can now be emptied completely within approx. 50 hours. The maximum flood level, which, according to the new Austrian directive, is nowadays defined as HQ5000 is now 270 m3/s and has thus almost doubled compared to the original value. For these reasons the flood spillway at the dam crest had to be redesigned and a stilling basin had to be built at the dam toe, into which also the new monitoring gallery was integrated, which guarantees permanent accessibility of the monitoring installations. The monitoring system was upgraded by installing a plumb line, concrete thermometers, piezometers and drainages. The body of the dam was sealed with the help of injections and by a shell of shotcrete along parts of the upstream side.
Rehabilitation of Salza dam
Sanierung des Salza-Dammes
Schöberl, Peter (author)
2009
6 Seiten, 9 Bilder, 7 Quellen
Conference paper
English
Die Salvatorkirche des Hochmeisters Hermann von Salza in Andria
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