Excavation offshore

A conservation laboratory equipped to deal with finds had functioned at the Trust headquarters at Portsmouth since 1979, and the external Advisory Committees met regularly to review progress and monitor the work as it progressed. In 1982 a suitable dock in the Royal Naval Base was equipped to receive the hull while it was cleaned, restored and conserved. The salvage plans and a detailed research programme to define passive and active conservation techniques went on concurrently with the excavation offshore between 1980 and 1982. 

Canadian Geotechnical Journal (0008-3674). Published by the National Research Council of Canada, this bimonthly journal was started in 1963. It presents papers on foundations, excavations, soil properties, dams, embankments, slopes, rock engineering, waste management, frozen soils, and offshore soils. 

Fig. 20.29(b) shows the constmction of an offshore wetlands habitat area using spoil excavated from a nearby mnnel construction. The spoil, which consisted of fine, uniform sand, was also used to fill the geotextile tube containment dyke surrounding the wetlands development area. For permanent protection, a rock armour layer was placed over the outer surface of the geotextile mbe containment dyke. 

---