Fugro Engineering Services (FES) has completed site investigations for the proposed second crossing in Poole Harbour, Dorset. The bridge (above) will span 19m over the Backwater Channel between Poole and Hamworthy.
Working for consultant Gifford, FES has been involved with geological and geoenvironmental techniques on land and over water. It put down three cable percussion boreholes to 35m deep on both sides of the bridge. Also included in the contract were five 3.7m trial pits, ten 1.2m observation pits, 15 window sample boreholes to 4m and six CPT tests to 24m.
Overwater FES carried out seismic piezocone penetration tests at the proposed site of the bridge piers and quay walls. Twenty-five seabed vibrocones were recovered from the channel for contamination testing.
The triangular bridge will open 3000 times a year and is designed to be a landmark crossing.