Renovation of water-side dam wall:
Remedial works to the dam wall of Pöhl Reservoir
Constructed between 1958 and 1964, the curved gravity dam measures 34 m high and 312 m long. The dam is 10 m thick at the top and 25 m thick at the bottom.
Designed for irrigation and flood control, the structure also functions as a hydroelectric power station and includes two inspection walkways, the gatehouse and the power house with a Francis Spiral turbine (750 kW) and two bottom outlets.
Job Report – Factsheet
- Project: Pöhl Reservoir – renovation of the dam wall
- Contractor: Landestalsperrenverwaltung Sachsen
- Special feature: Working at up to 30 m high on narrow trusses
- Cutting: Water-side 5000 m² concrete (5 - 30 cm depth, 6 -12 m processing height), in combination with 6000 m² air-side (5 - 10 cm depth, 6 -30 m processing height)
The severely damaged concrete surface of the water-side dam wall required reconstruction. The remedial works of the dam wall took place in two stages. Firstly, large areas of damaged, weathered old concrete were removed by high-pressure water blasting.
Then a 20 cm-thick shotcrete facing formwork was constructed. The area to be restructured measured 5000 m² (processing height: 6 - 12 m). Work was carried out on 1.50 m-wide trusses above the water. The extensive cutting covered 3 m in one operation. Thanks to different cutting techniques, it was possible to work on different construction geometries simultaneously.