Industrial machinery manufacturer Hollandia Services has restored a bridge section in Den Haag, the Netherlands, using cube jacks from Enerpac.
As well as renewing the entire road surface and bridge coating system, Hollandia needed to replace the electrical and hydraulic systems that powered the Boekhorstbrug table bridge in Den Haag. These hydraulic systems, placed at all four corners of the bridge, allowed it to move up and down.
As a mobile crane on land or on a vessel were not viable options, Hollandia instead jacked up the bridge before driving a flatbed trailer with a slewing ring below the bridge. It was then lowered onto the slewing ring to rotate it 90 degrees, so that it could be transported through nearby residential areas to a wharf in Krimpen aan den Ijssel.
“Our challenge was [figuring out] how to lift the bridge to a height of approximately 3 m and be able to lower it back down in a short space of time. The Enerpac SCJ-100 cube jacks provided the perfect solution,” said Emiel Maas, project coordinator, Hollandia Services.
Within 20 minutes, the Enerpac cube jacks jacked up the bridge from a height of 0.75 m to 3 m. Once the slewing ring had been placed under the bridge, it sat at a height of 2.3 m as it rested on the ring. Once rotated, the cube jacks were re-engaged to raise the bridge to 3 m again, allowing it to be rested on stands on the flatbed trailer. Hollandia reversed the process for the reinstallation of the bridge.
Enerpac’s SCJ-series cube jack uses a base lifting frame and self-aligning, lightweight steel cribbing blocks to provide stability during lifts.
