Hebron Gravity Based Structure
The Hebron oil field off Newfoundland and Labrador, Canada, will be developed using a stand-alone concrete gravity based structure (GBS). This GBS oil platform is built out of steel-reinforced, post-tensioned concrete using the slipforming method of construction. It is designed to withstand sea ice, icebergs, storms and offshore waves. Kiewit-Kvaerner Contractors, an equal partnership between Peter Kiewit Infrastructure Co. and Kvaerner Canada Ltd. has been awarded a contract by ExxonMobil Canada for building this GBS. The contract is for the GBS design, procurement, construction and installation in approximately 93 m water depth.
Below, the lower part of the GBS has left the dry dock and slipform work is progressing on the crude oil storage tanks. The slipforming of the 35 m diameter main shaft will start towards the end of 2015.