Architectural, construction, engineering and inspection services

Description

The services consist of integrated survey: geophysical, UXO and geotechnical to be performed along a corridor of approximately 345 km length between Spanish Mainland and Mallorca Island, in the Mediterranean Sea, in water depths ranging between 0 and approximately 1 600 m LAT. The purposes of the geophysical and geotechnical investigations are the determination of the detailed seabed conditions and stratigraphy with detailed characterisation of the materials in the surface and subsurface soil layers in order to inform the installation of submarine cables. The geophysical investigation shall include both surface and subsurface survey (subbottom profiling). The purpose of the UXO survey is to ensure an as low as reasonably practicable (ALARP) UXO risk at each anticipated geotechnical location to be investigated during the subsequent Geotechnical Survey. The execution and the scope of the UXO survey will be subjected to the results of the ‘UXO risk assessment and mitigation strategy’ study. The geotechnical investigation shall consist in CPTs, vibro cores, piston cores, rock cores and similar. It includes the collections of quality samples of soil and rock to be tested onshore and offshore for the determination of physical and mechanical properties, to support the interpretation of the geophysical data.