The Airbus A380 will land at Amsterdam`s International Airport Schiphol on a regular basis very soon. Between touchdown and takeoff, the world`s largest passenger aircraft will park on new concrete pavements in front of the terminal. Dutch contractor Reef Infra B.V. built the new, suitably large and stable parking and traffic areas using a Wirtgen slipform paver SP 1600 (Germany).
Daily production exceeds 2,000 cubic metres. A total surface of 27,000 sqm was built in just 5 days. Wirtgen slipform paver could achieve such high daily production rates because it worked non-stop and with maximum precision. The huge aircraft has a maximum takeoff weight of 560 tons, which is higher than that of any other civil aircraft. To account for these high loads, the SP 1600 was equipped with a dowel bar inserter (DBI) which reinforced the concrete by inserting dowel bars with a diameter of 45 mm at 5 m intervals. The paver`s central tie bar inserter (TBI) inserted longitudinal tie bars to reinforce the concrete across the paving direction. The slipform paver was additionally equipped with a heavy-duty oscillating beam and super smoother to ensure good surface evenness. A well-rehearsed team followed behind the slipform paver, applying a special manual broom finish and spraying a dispersion to prevent the concrete from drying out.
 Excellent machine engineering combined with a highly mature machine control system that furnishes all signals for steering and height adjustment enable the slipform paver to achieve such a high degree of precision. In this project, the specifications for cross-section, line and level of the concrete pavement were performed via the computer of the wireless 3D levelling system. This 3D controller uses a special interface to communicate with the SP 1600`s standard levelling and steering controller. It results in the drastic reduction of error sources, decrease in set-up times, improved safety and integrated documentation.
Concrete paving without using stringlines saves a lot of time. Work becomes easier also for the drivers of transport trucks and mixer trucks, since they need not pay attention to tensioned stringlines and can drive up to the paver straight away. This saves both fuel and time, thus increasing the overall profitability. The system also provides increased safety for the crew working on site, as the wireless system eliminates the hazard of stumbling over the stringlines.
The customers relied on the numerous benefits offered by wireless control. The wireless control system allowed them to save both the time and the costs. And the result meets all the expectations.
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