SeaRoc has awarded FoundOcean the grouting contract for Narec’s Offshore Anemometry Hub (NOAH), which is situated three nautical miles off the coast of Blyth.
The 60m-high tripod foundation, which weighs 535 tonnes, will support a 70-tonne platform and a 25-tonne meteorological mast. The platform will be secured using a rock-socket-grouted connection and a grouted pile sleeve connection located at each of its three legs.
The grouting operations will take place in two stages: first, the jacket will be placed on the seabed at a depth of 38m; and second, a 10m-deep rock socket will be drilled through the pile sleeve.
FoundOcean will then mix and pump a specialist grout into the socket. Immediately following this, a stab-in pile will be lowered through the sleeve and into the grouted rock socket. The remaining two rock socket connections will follow the same procedure.
Once the rock socket connections are established, FoundOcean will inject grout into the three annuli between the piles and the tripod sleeves via connectors above sea level.