Since July 2016 a Liebherr duty cycle crawler crane of the type HS 8130 HD is operating amidst the Swiss Alps. The machine is used to dredge large amounts of sediment on the filter grids of the Lake Luzzone reservoir. In future, this should ensure the unhindered flow of water to the power station in the Ticino town of Olivone.
At depths of up to 200 m, a total of 125 000 m³ of material has accumulated in close proximity to the power station. In order to carry out the dredging work the HS 8130 HD is equipped with a mechanical clamshell bucket from Negrini, which was specially produced by the Italian manufacturer for this specific assignment. Thanks to its large filling capacity of 10 m³, an average hourly handling performance of about 130 m³ can be achieved.
The HS 8130 HD is fitted with a V-8 diesel engine from Liebherr with 505 kW / 686 hp. The machine´s sophisticated hydraulic system ensures a low fuel consumption of mere 35 litres per hour.
The delivery of the HS 8130 HD to Lake Luzzone imposed an immense challenge. The basic machine’s low transport weight of only 51 tonnes and the maximum transport width of a only 3,5 m were an enormous advantage.
The assembly of the HS 8130 HD was carried out directly on the shore of the reservoir with the aid of a Liebherr mobile crane. Subsequently the duty cycle crawler crane was driven onto and mounted on a barge, which was also assembled on-site. Thanks to its robust design the Liebherr duty cycle crawler crane is ideally equipped for the dynamic forces which especially influence the uppercarriage in dredging operation.
It is anticipated that the duty cycle crawler crane will be operating on the high altitude reservoir in the Swiss Alps, between May and October, for two years.