Seite - 1356 - in Book of Full Papers - Symposium Hydro Engineering

12 – 14 cm over the entire height within a short period. The measurement data 5 m below the maximum reservoir level shows a differential horizontal displacement between the upstream filter zone and the downstream core surface of about 3 cm. The first drawdown leads to a back-deformation of the core to the upstream side of about 3 cm. For the reservoir operation until 1999, the measurements show a continuing enlargement of the differential settlements between upstream and downstream while the horizontal deformations remain almost constant. The horizontal deformation of the core between maximum reservoir level and drawdown is elastic with a differential deformation of about 4 cm. It can be concluded that the deformations as shown in Figure 7 are parallel to the core and a widening of the asphalt concrete core can therefore be excluded. The Finstertal Dam has been successfully operated for 38 years and is consolidated without any problem of the asphalt concrete core. Fig. 7: Finstertal Dam – Absolute and differential displacements between the upstream filter zone and the downstream core surface 4. BEHAVIOUR OF AC DAMS BASED ON THE RESULTS OF NUMERICAL ANALYSES For the contribution, a numerical simulation of a 128 m high ACRD (asphalt core rockfill dam) was carried out in order to show a typical behaviour of an asphalt concrete core rockfill dam during construction and impounding. Numerical analyses are a useful tool to provide a detailed picture about the stress and 1356