Dredging large amounts of sediments

Duty cycle crawler crane HS 8130 HD in dredging application

Duty cycle crawler crane HS 8130 HD in dredging application

The dredging work should ensure the unhindered flow of water to the power station in the Ticino town of Olivone.

Since July 2016, a Liebherr HS 8130 HD cycle duty crawler crane, belonging to the newest generation, is operating amidst the Swiss Alps. It is being used to dredge large amounts of sediment on the filter grids of the Lake Luzzone reservoir. At depths of up to 200 m, a total of 125,000 m³ of material has accumulated in close proximity to the power station.

It is anticipated that the duty cycle crawler crane will be operating for two years during summer months. Only after the completion of this work can the power station in Olivone be put back into full operation.

The importance of this project derives from the fact that a yearly average of 180 million m³ of water flow through the turbines of the Olivone power station and consequently generate approximately 234,000 MWh of energy.

Challenging delivery

The delivery of the construction machine imposed an immense challenge for the transport company. On the way to its job site the duty cycle crawler crane did not only have to negotiate numerous hairpin bends but also pass through two narrow tunnels and cross a 225 m high dam. Furthermore, shortly before transportation the road had to be cleared of fallen rock.

  • The high number of bends in the last stretch of the road, the bad weather with heavy rainfall and the danger of falling rock were a real challenge.

    Precise planning in advance

    The high number of bends in the last stretch of the road, the bad weather with heavy rainfall and the danger of falling rock were a real challenge.

  • Due to the extremely limited amount of space the uppercarriage and the undercarriage of the duty cycle crawler crane were delivered separately.

    Steep roads with several serpentine bends

    Due to the extremely limited amount of space the uppercarriage and the undercarriage of the duty cycle crawler crane were delivered separately.

  • The basic machine’s low transport weight of only 51 tonnes and the maximum transport width of a mere 3.5 m were an enormous advantage.

    High number of bends in the last stretch of the road

    The basic machine’s low transport weight of only 51 tonnes and the maximum transport width of a mere 3.5 m were an enormous advantage.

  • Before reaching its destination a 225 m high reservoir dam had to be crossed. The wall was completed in 1963 and lies 1609 metres above sea level.

    Spectacular crossing of the dam

    Before reaching its destination a 225 m high reservoir dam had to be crossed. The wall was completed in 1963 and lies 1609 metres above sea level.

  • In order to pass through the two narrow tunnels the duty cycle crawler crane had to be transferred to a smaller carrier shortly before its destination.

    Restricted space in the tunnel

    In order to pass through the two narrow tunnels the duty cycle crawler crane had to be transferred to a smaller carrier shortly before its destination.

  • 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 of the LTM series.

    Assembly on the shore of the reservoir

    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 of the LTM series.

  • Subsequently the duty cycle crawler crane was driven onto and mounted on a barge, which was also assembled on-site. And so the work could begin.

    Operation on a floating barge

    Subsequently the duty cycle crawler crane was driven onto and mounted on a barge, which was also assembled on-site. And so the work could begin.

Dredging with a special clamshell

The new HS 8130 HD is equipped with a specially produced mechanical clamshell bucket from Negrini. In this combination outstanding turnover cycles can be achieved.

  • 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.

    Robust machine

    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.

  • 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 for great depths.

    Clamshell for dredging

    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 for great depths.

  • Thanks to its large filling capacity of 10 m³, an average hourly handling performance of about 130 m³ can be achieved.

    High handling capacity

    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 that fulfils the latest emission standards.

    Fulfils latest emission standards

    The HS 8130 HD is fitted with a V-8 diesel engine from Liebherr with 505 kW / 686 hp that fulfils the latest emission standards.

  • The smooth and precise control system provides for easy handling of the machine and allows for short working cycles.

    Smart control system

    The smooth and precise control system provides for easy handling of the machine and allows for short working cycles.

  • Through its sophisticated hydraulic system the duty cycle machine requires a mere 35 litres of diesel per hour.

    Economical drive system

    Through its sophisticated hydraulic system the duty cycle machine requires a mere 35 litres of diesel per hour.

Video

Dredging application of a new HS 8130 HD from Liebherr on a reservoir in the Swiss canton of Ticino

The film shows the challenging transport of the duty cycle crawler crane up to 1600 metres above sea level in the Swiss Alps and offers stunning impressions of dredging operations in the middle of a reservoir. Open video

Dredging application of a new HS 8130 HD from Liebherr on a reservoir in the Swiss canton of Ticino

Duty cycle crawler cranes at a glance

The duty cycle crawler cranes are robust and flexible in use and thus perfectly designed for dynamic applications. Thanks to their efficient hydraulic system great turnover performance is achieved.

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