Slipforming Hebron Offshore GBS

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.

slipforming

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. slipforming

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