Steep embankments often cause unpleasant surprises and dangerous situations for rail traffic – for example, when loose stones or earth slip down onto the railway tracks. SWIETELSKY used the PALFINGER PCC 57.002 crawler crane in an off-road operation to perform challenging slope stabilization works on the Salzburg local railway near Bergheim, giving the crane yet another opportunity to show off its versatility on off-road terrain.
This specialist deployment involved laying foundations for slope stabilization right beside the railway tracks of the Salzburg local railway, in an area that was difficult to reach to carry out the required drilling works. The precarious terrain, the lack of space to manoeuvre the crane and the need to add a specialist drilling attachment to it without compromising on lifting capacity were all compelling reasons to deploy the manoeuvrable and versatile PCC 57.002 crawler crane from PALFINGER.
Fine-tuning the PCC 57.002
A BL-3200 drill boom from Werner Köhle based in Arzl im Pitztal and weighing 850 kg was attached to the arm of the PCC 57.002 to carry out the slope works. At the same time, the crane was fitted with an auxiliary hydraulic power unit and integrated with hoses featuring an increased nominal diameter – with a flow capacity of 130 l/min and dynamic pressure of approximately 16 bar – to provide the actual drilling drive and feed motion. These adaptations were required to turn the PALFINGER crawler crane into exactly what the customer needed.
Injecting the foundations into the slope
The drilling method the company employed used a specialist threaded rod as a drill, and once the drilling was complete, this was left in the ground and surrounded with concrete. The PCC 57.002 was impressive not only during the operation itself – when the PALcom P7 radio remote control was used to direct the crane accurately and keep it close to the drilling point – but even beforehand during the preparatory works along the slope edge. The easy-to-operate telescopic stabilisers made it possible to compensate automatically for level differences as great as 8° to an accuracy of the nearest centimetre. Optimum crane positioning and alignment are essential – especially for specialist deployments like this, where the challenging ground conditions really put system stability to the test
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PCC 57.002 impresses during pilot project
Everything was set up perfectly for the job, which meant that the drilling works could also be completed successfully within the planned time frame. Right at the end of the process, steel mesh was stretched across the slope and fixed to the rods, which had been drilled in and surrounded with concrete, to prevent the slope from moving again in the future. For SWIETELSKY, this was a pilot project that set a precedent for the future, as authorised representative Johann Dobrezberger (Ing.) reiterated: ‘We were impressed by the small installation area that the PCC 57.002 required combined with its exceptional operability in every position. It has therefore proven its usefulness for other tricky operations in the future.’