HFG– Graving Dock Gate

The graving dock gate is designed to replace a temporary sheet pile wall for ATP titan load out (the first deepwater dry tree drilling and production hull built in the fabrication yard in Heerema USA). The Dock gate has a global dimension of 600’ x 250’ x 40’, facilitated by a buoyancy tank of 800te buoyance capacity in the upper part of the structure. At the bottom part a hook beam is designed to fix the gate horizontally to the submerged concrete foundation.
The structure is analyzed by a FE model in various loading conditions, like wave loads, ice loads, operational hydraulic pressure, floating position and lifting condition. Miscellaneous details, regarding welded joints, bollards, lifting eyes and anchors to concrete floor are analyzed.