Krupp Fördertechnik’s material handling division has been awarded a contract to supply and erect two cable cranes for the construction of the drinking water dam Leibis-Lichte situated in Thuringia.
Each cable crane has a carrying capacity of 20t with a lifting height of 140m and a span of 615m.
Primarily the cable cranes are used to transport the concrete for the construction of the dam having a total volume of approximately 600,000 cubic metres, but also to carry out excavating work, as well as transport of construction equipment or other individual loads. The concrete will be brought by silo trucks from the mixing plant to a loading ramp located within the operating zone of the respective cable crane. There it will be filled into concrete buckets. The buckets are suspended from the bottom flange of the cranes which will transport them to the place of concrete pouring in the dam.
The cable cranes are of radial-travelling type, i.e. the track rope on which the cable crane trolleys run, is stretched between a fixed point and a travelling countercarriage. To adapt the runway of the countercarriage to the topography of the terrain it was necessary to design the runway as a spherical curve, with the fix-point at the centre of the sphere. The maximum inclination of the runway is 40%.
Apart from the design, the manufacture and supply of the cable cranes and associated equipment, Krupp Fördertechnik was also awarded the contract for the erection and commissioning works involved. The contract provides 50 weeks for completion of the works.
