By Susan Gourvenec, David White

Frontiers in Offshore Geotechnics II contains the court cases of the second one overseas Symposium on Frontiers in Offshore Geotechnics (ISFOG), organised via the Centre for Offshore starting place structures (COFS) and held on the collage of Western Australia (UWA), Perth from eight – 10 November 2010. the quantity addresses present and rising demanding situations dealing with these operating in offshore geotechnics, spanning building, layout and learn. Keynote papers with authors from and academia describe the cutting-edge of perform and concept. an additional 117 peer-reviewed papers describe rising study, new layout thoughts and up to date case reviews on the topic of the frontiers of offshore geotechnical engineering. the subjects of the papers contain geohazards, fuel hydrates, in situ web site characterisation and pore strain size, web site research, soil characterisation, foundations for renewable power, shallow foundations, jack-up devices, piled foundations, anchoring structures, pipelines and threat and reliability. New and confirmed layout equipment representing most sensible perform are mentioned along new development applied sciences and rising examine principles. Frontiers in Offshore Geotechnics II offers a entire cutting-edge reference for execs and researchers in offshore, civil and maritime engineering and for soil mechanics specialists.

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Sample text

The UK Institution of Civil Engineers UK indicate that the largest element of technical and financial risk on construction projects is normally in the ground (ICE 1991), and that the costs overruns and delays arising from inadequate geotechnical investigations can effect 18 to 50% of construction projects. For underground structures with significant soil interfaces such as tunnels, up to 85% of projects could be affected (USNCTT 1984). The amount spent on geotechnical investigations for onshore construction projects in the UK is typically between 1% and 5% of the capital cost but geotechnical cost overruns can be up to 50% of the project value (AGS 2003).

Similarly, experienced offshore design and installation contractors are better placed to manage geotechnical risks. However, the responsibility for geotechnical risks is not always clear, even in so-called non-geohazardous areas. For example, unproven, often bespoke, designs naturally carry greater than normal construction and operational risks for operators and their contractors. These risks increase for EPC contractors when they are required to adopt or adapt research-based design methods that are the intellectual properties of operators or niche specialists.

1997, Leroueil 2001), formed in previous slides were estimated by a simple pore pressure equilibration model. Regional geotechnical parameters were generally used in the screening process but the local effects of exceptionally weak or brittle layers, or pre-existing shear surfaces (geotechnical modifiers) were also considered. Complementary engineering studies were performed to assess the potential impacts of geohazards such as submarine slides on typical seabed infrastructure (Parker et al. 2008, 2009).

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