Frontiers in Offshore Geotechnics II

Frontiers in Offshore Geotechnics II comprises the Proceedings of the Second International Symposium on Frontiers in Offshore Geotechnics (ISFOG), organised by the Centre for Offshore Foundation Systems (COFS) and held at the University of Western Australia (UWA), Perth from 8 ? 10 November 2010. The volume addresses current and emerging challenges

Table of Contents:
1 Keynotes A systematic approach to offshore engineering for multiple-project developments in geohazardous areas T.G. Evans Recommended best practice for geotechnical site characterisation of cohesive offshore sediments D.J. DeGroot, T. Lunne & T.I. Tjelta Gulf of Guinea deepwater sediments: Geotechnical properties, design issues and installation experiences J.-L. Colliat, H. Dendani, A. Puech & J.-F. Nauroy Geotechnics for subsea pipelines D.J. White & D.N. Cathie Axial and lateral pile design in carbonate soils C.T. Erbrich, M.P. O'Neill, P. Clancy & M.F. Randolph New frontiers for centrifuge modelling in offshore geotechnics C. Gaudin, E.C. Clukey, J. Garnier & R. Phillips Risk and reliability on the frontier of offshore geotechnics R.B. Gilbert, J.D. Murff & E.C. Clukey 2 Geohazards and gas hydrates Neotectonic deformation of northwestern Australia: Implications for oil and gas development J.V. Hengesh, K. Wyrwoll & B.B. Whitney Deepwater Angola part I: Geohazard mitigation A.J. Hill, J.G. Southgate, P.R. Fish & S. Thomas Deepwater Angola part II: Geotechnical challenges A.J. Hill, T.G. Evans, B. Mackenzie & G. Thompson Shallow gas hazard linked to worldwide delta environments S. Kortekaas, E. Sens & B. Sarata Analysis of submarine flow slides in fine silty sand P.V. Lade & J.A.Yamamuro Hydrate dissociation around oil exploration infrastructure A.K. Sultaniya, J.A. Priest & C.R.I. Clayton An investigation of past mass movement events in the West Nile Delta S. Thomas, L. Bell, K. Ticehurst & P.S. Dimmock Deformation of seabed due to exploitation of methane hydrate reservoir J. Yoneda, M. Hyodo, Y. Nakata, N. Yoshimoto & R. Orense 3 In situ site characterisation and pore pressure measurement A site investigation strategy to obtain fast-track shear strength design parameters in deep water soils D. Borel, A. Puech & S. Po Enhancement of the ball penetrometer test with pore pressure measurements N. Boylan, M.F. Randolph & H.E. Low Laboratory free falling penetrometer test into clay S.H. Chow & D.W. Airey Offshore sediment overpressures: Overview of mechanisms, measurement and modeling B. Dugan, T.C. Sheahan, J.M. Thibault & T.G. Evans Angolan deepwater soil conditions: GIS technology development for sediment characterization P. Enjaume, M. Hamon, K. Epalanga & B. Mackenzie Strength measurement in very soft upper seabed sediments P. Kelleher, H.E. Low, C. Jones, T. Lunne, S. Strandvik & T.I. Tjelta CPT in polar snow - preliminary observations A.B. McCallum, A. Barwise & R. Santos Parametric study of a free-falling penetrometer in clay-like soils M. Nazem & J.P. Carter The future of deepwater site investigation: Seabed drilling technology? J.J. Osborne, A.G. Yetginer, T. Halliday & T.I. Tjelta Mini T-bar testing at shallow penetration A. Puech, M. Orozco-Calderon & P. Foray Piezometer installation in deepwater Norwegian Sea T.I. Tjelta & J. Strout Luva deepwater site investigation programme and findings T.I. Tjelta & A.G. Yetginer Investigations into novel shallow penetrometers for fine-grained soils Y. Yan, D.J. White & M.F. Randolph Seabed drilling vs surface drilling - a comparison A.G. Yetginer & T.I. Tjelta 4 Soil characterisation and modelling Rheological behaviour of soft clays P.E.L. de Santa Maria, I.S.M. Martins & F.C.M. de Santa Maria A three-dimensional finite element study of the direct simple shear test J.P. Doherty & M. Fahey Repeated loading and unloading of the seabed H.J.E. Hu, K.K. Tho, C.T. Gan, A.C. Palmer & C.F. Leung A new interpretation of the simple shear test H.A. Joer, C.T. Erbrich & S.S. Sharma Physical modelling of the crushing behaviour of granular materials H.A. Joer & S.S. Sharma New evidence for the origin and behaviour of deep ocean 'crusts' M.Y-H. Kuo, M.D. Bolton, A.J. Hill & M.J. Rattley Soil unit weight estimated from CPTu in offshore soils P.W. Mayne, J. Peuchen & D. Bouwmeester Strain rate dependent simple shear behaviour of deepwater sediments in offshore Angola M.J. Rattley, A.J. Hill, S. Thomas & B. Sampurno Simplified calibration procedure for a high-cycle accumulation model based on cyclic triaxial tests on 22 sands T. Wichtmann, A. Niemunis & Th. Triantafyllidis Understanding cyclic loading behavior of soil for offshore applications J. Yang 5 Shallow foundations Observations of shallow skirted foundations under transient and sustained uplift H.E. Acosta-Martinez, S. Gourvenec & M.F. Randolph Numerical study of grillage foundations on sand under combined VHM loading M. Banimahd, A. Maconochie & J. Oliphant The vertical bearing capacity of grillage foundations in sand M.F. Bransby, P. Hudacsek, J.A. Knappett, M.J. Brown, N. Morgan, D.N. Cathie, R. Egborge, A. Maconochie, G.J. Yun, N. Brown & A. Ripley Behaviour of skirted footings on sand overlying clay C.T. Gan, K.L. Teh, C.F. Leung, Y.K. Chow & S. Swee Numerical study of piping limits for suction installation of offshore skirted foundations and anchors in layered sand L.B. Ibsen & C.L. Thilsted Shallow foundation performance in a calcareous sand B.M. Lehane A numerical study of the vertical bearing capacity of skirted foundations D.S.K. Mana, S. Gourvenec & M.F. Randolph The effect of torsion on the sliding resistance of rectangular foundations J.D. Murff, C.P. Aubeny & M. Yang Foundation design challenges of the MCR-A skirted gravity platform L. Tapper, C. Humpheson & B.M. Lehane Constructing breakwater with prefabricated caissons on soft clay S. Yan, X. Feng & J. Chu 6 Piled foundations Simplified analysis of laterally loaded pile groups F.M. Abdrabbo & K.E. Gaaver Behavior of piles under combined lateral and axial loading M. Achmus & K. Thieken Investigations on the behavior of large diameter piles under cyclic lateral loading M. Achmus, J. Albiker & K. Abdel-Rahman BP Clair phase 1 - Pile driveability and capacity in extremely hard till T.R. Aldridge, T.M. Carrington, R.J. Jardine, R. Little, T.G. Evans & I. Finnie Photoelastic investigation into plugging of open ended piles J. Dijkstra, E.A. Alderlieste & W. Broere Soil-pile interaction during extrusion of an initially deformed pile C.T. Erbrich, E. Barbosa-Cruz & R. Barbour BP Clair phase 1 - Geotechnical assurance of driven piled foundations in extremely hard till T.G. Evans, I. Finnie, R. Little, R.J. Jardine & T.R. Aldridge Pile driving experiences in Persian Gulf calcareous sands K. Fakharian & I.H. Attar FLAC3D analysis on soil moving through piles E.H. Ghee & W.D. Guo Cyclic loading of barrettes in soft calcareous rock using Osterberg cells C.M. Haberfield, D.R. Paul, M.C. Ervin & G.A. Chapman Shaft capacity of drilled and grouted piles in calcareous sandstone B.M. Lehane Numerical analysis of mudmat contribution to capacity of piled offshore platforms L.S.D. Lorenti, M.A. Ismail & B.M. Lehane Simplified numerical model for analysis of offshore piles under cyclic lateral loading M.M. Memarpour, M. Kimiaei & M. Shayanfar Centrifuge modelling of rapid load tests with piles in silt and sand C.T. Nguyen, H. van Lottum, P. Holscher & A.F. van Tol Field measurements on monopile Dolphins A. Sadeghi-Hokmabadi & A. Fakher Behaviour of driven tubular steel piles in calcarenite for a marine jetty in Fujairah, United Arab Emirates J. Thomas, M. van den Berg, F. Chow & N. Maas CPT-Based design method for axial capacity of offshore piles in clays B.F.J. Van Dijk & H.J. Kolk 7 Foundations for renewable energy Evaluation of pile capacity approaches with respect to piles for wind energy foundations in the North Sea M. Achmus & M. Muller Installation of suction caissons for offshore renewable energy structures O.J. Cotter, B.W. Byrne & G.T. Houlsby Lateral behaviour of large diameter monopiles at Sheringham Shoal Wind Farm L. Hamre, S. Feizi Khankandi, P.J. Strom & C. Athanasiu Centrifuge modelling of offshore monopile foundation R.T. Klinkvort & O. Hededal Gravity based foundations for the Rodsand 2 offshore wind farm, Denmark L. Krogh, J.H. Lyngs & J.S. Steenfelt Geotechnics for developing offshore renewable energy in the US M. Landon Maynard & J.A. Schneider Engineering issues for fixed offshore wind turbines on Lake Michigan Mid Lake Plateau, USA P.J. Lang, J.A. Schneider, K. Smith & T. McNeilan Centrifuge model tests on piled footings in clay for offshore wind turbines B.M. Lehane, W. Powrie & J.P. Doherty Design of monopile foundations in sand for offshore windfarms M. Saue, T.E. Langford & N. Mortensen Experimental evaluation of backfill in scour holes around offshore monopiles S.P.H. Sorensen, L.B. Ibsen & P. Frigaard An investigation of the use of a bearing plate to enhance the lateral capacity of monopile foundations K.J.L. Stone, T.A. Newson, M. El Marassi, H. El Naggar, R.N. Taylor & R.J. Goodey Optimizing site investigations and pile design for wind farms using geostatistical methods: A case study B. Stuyts, V. Vissers, D.N. Cathie, C. Jaeck & S. Dorfeldt Towards the FE prediction of permanent deformations of offshore wind power plant foundations using a high-cycle accumulation model T. Wichtmann, A. Niemunis & Th. Triantafyllidis Cyclic accumulation effects at foundations for offshore wind turbines H. Wienbroer, H. Zachert, G. Huber, P. Kudella & Th. Triantafyllidis Study on soil-structure interaction of suction caisson by large-scale model tests B. Zhu, D.Q. Kong, L.G. Kong, R.P. Chen & Y.M. Chen 8 Jack-up units Simplified VH equations for foundation punch-through sand into clay J.-C. Ballard, P. Delvosal, P.H. Yonatan, A. Holeyman & S. Kay Characterisation of undrained shear strength using statistical methods B. Bienen, M.J. Cassidy, M.F. Randolph & K.L. Teh Centrifuge modelling of spudcan deep penetration in multi-layered soils M.S. Hossain, M.F. Randolph & Y.N. Saunier A probabilistic approach to the prediction of spudcan penetration of jack-up units G.T. Houlsby An assessment of jackup spudcan extraction O.A. Purwana, H. Krisdani, X.Y. Zheng, M. Quah & K.S. Foo 3D FE analysis of the installation process of spudcan foundations G. Qiu, S. Henke & J. Grabe Undrained bearing capacity of deeply embedded foundations under general loading Y. Zhang, B. Bienen, M.J. Cassidy & S. Gourvenec 9 Anchoring systems Trajectory prediction for drag embedment anchors under out of plane loading C.P. Aubeny & C.-M. Chi Setup following keying of plate anchors assessed through centrifuge tests in kaolin clay A.P. Blake, C.D. O'Loughlin & C. Gaudin Seismically-induced displacements of a suction caisson in soft clay A.J. Brennan, S.P.G. Madabhushi & P. Cooper SEPLA keying prediction method based on full-scale offshore tests R.P. Brown, P.C. Wong & J.M. Audibert Set-up of suction piles in deepwater Gulf of Guinea clays J.-L. Colliat & D. Colliard Centrifuge testing of suction piles in deepwater Nigeria clay - Effect of stiffeners and set-up time J.-L. Colliat, H. Dendani, H.P. Jostad, K.H. Andersen, L. Thorel, J. Garnier & G. Rault Numerical FEM and laboratory study of the bearing capacity factor Nc for plate anchors L.N. Equihua-Anguiano, M. Orozco-Calderon, P. Foray & M. Boulon Caisson capacity in clay: VHM resistance envelope - Part 2: VHM envelope equation and design procedures S. Kay & E. Palix Installation and in-place assessment of drag anchors in carbonate soil M.P. O'Neill, S.R. Neubecker & C.T. Erbrich Caisson capacity in clay: VHM resistance envelope - Part 1: 3D FEM numerical study E. Palix, T. Willems & S. Kay Numerical investigation of the behaviour of suction caissons in structured clays S. Panayides, M. Rouainia & A. Osman Cyclic moment loading of suction caissons in sand B. Zhu, B.W. Byrne & G.T. Houlsby 10 Pipelines and risers Multidirectional analysis of pipeline-soil interaction in clay R.G. Borges & J.R.M.S. Oliveira Geotechnical challenges for deepwater pipeline design - SAFEBUCK JIP D.A.S. Bruton, M. Carr & F. Sinclair Large deformation finite element analysis of vertical penetration of pipelines in seabed S. Chatterjee, M.F. Randolph, D.J. White & D. Wang Implementation of geotechnical techniques in the analysis of pipeline response G. Cumming & N. Brown Lateral soil resistance to an untrenched pipeline under the action of ocean currents F.P. Gao, S.M. Yan, E.Y. Zhang, Y.X. Wu & X. Jia Vertical cyclic testing of model steel catenary riser at large scale T.E. Langford & V.M. Meyer Kupe gas project pipeline - optimisation of discrete rock berm design shore approach B.L. Larsson Model test studies on soil restraint to pipelines buried in sand R. Liu, S.W. Yan & J. Chu Pipe-soil interaction on clay with a variable shear strength profile D.R. Morrow & M.F. Bransby Sweeping behaviour of shallowly-embedded pipeline during cyclic lateral movement T. Takatani Advanced nonlinear hysteretic seabed model for dynamic fatigue analysis of steel catenary risers I.H.Y. Ting, M. Kimiaei & M.F. Randolph Mobilization distance in uplift resistance modeling of pipelines J. Wang, S.K. Haigh, N.I. Thusyanthan & S. Mesmar Theoretical, numerical and field studies of offshore pipeline sleeper crossings Z.J. Westgate, M.F. Randolph, D.J. White & P. Brunning Observations of pipe-soil response from the first deep water deployment of the SMARTPIPE(R) D.J. White, A.J. Hill, Z.J. Westgate & J.-C. Ballard 11 Trenching, ploughing, excavation and burial Influence of object geometry on penetration into the seabed A. Ivanovic, R.D. Neilson, G. Giuliani & M.F. Bransby Investigation into the effect of forecutters on plough performance K.D. Lauder, M.J. Brown, M.F. Bransby & J. Pyrah State-of-the-art jet trenching analysis in stiff clays J.B. Machin & P.A. Allan Numerical modelling of soil around offshore pipeline plough shares W. Peng & M.F. Bransby Anchor-chain-rockfill-soil interaction: Evolution of design methods H. van Lottum & H.J. Luger Development of a jet trenching model in sand J.-F. Vanden Berghe, J. Pyrah, S. Goading & H. Capart 12 Design and risk Structural factors affecting the system capacity of jacket pile foundations J.Y. Chen, R.B. Gilbert, J.D. Murff, A.G. Young & F.J. Puskar The new API Recommended Practice for Geotechnical Engineering: RP 2GEO P. Jeanjean, P.G. Watson, H.J. Kolk & S. Lacasse Comparison of ISO 19901-2 and API RP 2A seismic design criteria for a site in the Caspian Sea, Turkmenistan Z.A. Lubkowski, J.E. Alarcon & Z.A. Razak Offshore geotechnics - safe and sustainable J. Peuchen & J. Haas