Construction World May 2022

was conducted over nine days. The actual jacking process was complete in less than eight hours from commencement. Savage concludes that the total movement of the pylon after jacking totalled 23 mm at a force of 1,750 kN – which was within the design parameters. The casting of lift seven to lock in the release of the moment will be complete by mid-April. 

he says. “The lateral support was wrapped in a 25 mm thick thermal blanket to limit temperature change movements and any resulting changes in prop forces.” The lateral support was locked into place using a two-part system: the locking ring on the hydraulic jack, and the locking ring on the super-shore jack housing. The preparation for the jacking took three months of planning and analysis, while the setup

These two legs make up the first 20 metres of the inverted Y shaped pylon and are built without any lateral support as free cantilevers.

Model of the complete temporary works.

27 CONSTRUCTION WORLD MAY 2022