1st Edition

Frontiers in Offshore Geotechnics III

Edited By Vaughan Meyer Copyright 2015

    Frontiers in Offshore Geotechnics III comprises the contributions presented at the Third International Symposium on Frontiers in Offshore Geotechnics (ISFOG, Oslo, Norway, 10-12 June 2015), organised by the Norwegian Geotechnical Institute (NGI). The papers address current and emerging geotechnical engineering challenges facing those working in off

    Preface, Committees, Reviewers, Sponsors, Volume 1, The Third ISSMGE McClelland Lecture, Introduction to Knut H. Andersen, The Third ISSMGE McClelland Lecturer, Cyclic soil parameters for offshore foundation design, Keynotes, The suction foundation technology, Geotechnics for wells top-hole section and conductor, The effects of pile ageing on the shaft capacity of offshore piles in sand, A FE procedure for calculation of cyclic behaviour of offshore foundations under partly drained conditions, Geohazard risk evaluation and related data acquisition and sampling program for the methane hydrate offshore production test, Deterministic and probabilistic advances in the analysis of spudcan behaviour, Suction anchors and caissons, Installation of suction caissons for an asymmetrical support structure in sandy soil, Simplified earthquake analysis for wind turbines and subsea structures on closed caisson foundations, Laterally loaded suction caissons with aspect ratio of one, Seismic response of bucket foundations for offshore wind tower using dynamic centrifuge tests, Friction degradation and strength regain along suction piles in soft deepwater Gulf of Guinea clays, Suction pile foundation for a PLET subsea structure, Suction caisson extraction resistance in Gulf of Guinea clay, Performance of a shallow skirted foundation for TLP mooring in carbonate silt, Calculation of undrained holding capacity of suction anchors in clays, Interpretation of centrifuge tests of suction anchors in reconstituted soft clay, CAISSON_VHM: a program for caisson capacity under VHM load in undrained soils, Suction anchor geotechnical design practice: A case study, Centrifuge model test for bearing capacity evaluation of hybrid suction foundation on clay under vertical and horizontal loads, Pullout resistance of horizontal and inclined loaded suction anchor installed in silty sand via centrifuge modelling, Skirt penetration resistance in carbonate soils from the CPT, Horizontal capacity of multiple suction anchors using numerical analysis, Dynamic behaviour of mono bucket foundations subjected to combined transient loading, Novel monitoring solutions solving geotechnical problems and offshore installation challenges, Effect of torsion on suction piles for subsea and mooring applications, Comparison of design methods for axially loaded buckets in sand, Caisson capacity in undrained soil: Failure envelopes with internal scooping, P–y curves for bucket foundations in sand using finite element modeling, Pipelines, risers and subsea earthworks, Seabed stiffness model for steel catenary risers, Ultimate uplift capacity of buried pipelines in undrained clay, Evaluation of a toroid for model pipeline testing of very soft offshore box core samples, Excess pore pressure redistribution beneath pipelines: FEA investigation and effects on axial pipe-soil interaction, Pipeline embedment and consolidation beneath on-bottom pipe model in kaolin clay, The soil strength degradation influence in the axial pipe-soil resistance, Pipe-Soil Interaction: Recent and future improvements in practice, Predicted and observed settlements of a subsea rock installation – comparison between field measurements and FE simulations of soft North Sea clay, Effects of different loading time histories on fatigue design of steel catenary risers using nonlinear riser-soil interaction models, A new torsional shear device for pipeline interface shear testing, Large scale experiments on the riser-soil interaction in clay, An integrated approach to pipeline burial in the 21st century – The current state-of-the-art, Direct shear interface tests for pipe-soil interaction assessment, Evaluation of pipe-soil interaction in liquefied soil, Pipe-soil interaction under rapid axial loading, Mechanical trencher modelling in hard ground: State-of-the-art, Finite element analysis of soil damping for pipeline slugging, Geotechnical considerations for pipeline stabilization design using rock berms, Pipe-soil interaction mechanism during pipeline upheaval buckling in loose saturated sand, Study of vertical pipe-soil interaction based on Coupled Eulerian-Lagrangian method, Stress level effects on plane-strain pipe uplift resistance, Theoretical analysis and model test for pipeline protection from dragged anchors, A discrete element study on upheaval ratcheting behavior of pipelines buried in sand, An investigation on existing nonlinear seabed models for riser-fluid-soil interaction studies in steel catenary risers, Geotechnical design and construction aspects of a pipeline-escarpment crossing, Piled foundations, Modelling of laterally loaded screw piles with large helical plates in sand, Design methodology for cyclically and axially loaded piles in chalk for Wikinger OWF, Full scale offshore verification of axial pile design in chalk, Centrifuge investigation of the axial cyclic behaviour of a single pile used for the foundation of a jacket type offshore wind turbine, Review of pile driving results for the M¯aui and Maari developments in the Taranaki basin of New Zealand, Cyclic pile load tests combined with laboratory results to design offshore wind turbine foundations in chalk, Comparison of pile bearing capacity from CPT and dynamic load tests in clay considering soil setup, The use of pipe piles for creating ice protection barrier, Improvement of bearing capacity of vibratory driven open-ended tubular piles, Small strain overlay to the API p-y curves for sand, Boulder-soil-pile dynamic interaction, Driven pile design in weak rock, Effect of soil set-up during interruption of offshore pile driving, Axial capacity design practice for North European wind-turbine projects, Lessons learned from pile driving and monitoring in gravels on the Northstar Artificial Island, Innovative design of foundations – offshore wind farm substation, A preliminary experimental study on the mechanism of local scour at pile groups in steady currents, Interpretation difficulties of pile set-up in sand, Evolution of driving resistance during driven pile installation, CPT-based pile shaft friction in calcareous sands of western Indian offshore, Synthesis of pile driving data in South East Asia, Case studies – predicting soil resistance to driving in South East Asia, Axial capacity ageing trends of piles driven in silica sands, In situ and laboratory tests in dense sand investigating the helix-to-shaft ratio of helical piles as a novel offshore foundation system, Re-assessment of pile driveability predictions on sites offshore Nigeria, Numerical implementation of soil-pile interaction models for monotonic and reversed axial loading, Ultimate lateral resistance of laterally loaded piles in undrained clay, Deepwater jetted piles: Numerical modeling of jetting action and axial bearing capacity, Centrifuge model tests on laterally monotonic and cyclic pile-soil interaction of a tetrapod jacket foundation, Monopiles, Model pile response to multi-amplitude cyclic lateral loading in cohesionless soils, On the development of a hybrid foundation for offshore wind turbines, Alternative p-y curve formulations for offshore wind turbines in clays, Improving the lateral resistance of offshore pile foundations for deepwater application, New design methods for large diameter piles under lateral loading for offshore wind applications, Cyclic lateral loading of monopiles for offshore wind turbines, Observed variations of monopile foundation stiffness, Design of large diameter monopiles in chalk atWestermost Rough offshore wind farm, Influence of vertical loads on the behavior of laterally loaded large diameter pile in sand, Predicting monopile behaviour for the GodeWind offshore wind farm, Evaluation of a new p-y approach for piles in sand with arbitrary dimensions, Experimental trends from lateral cyclic tests of piles in sand, Effect of relative pile’s stiffness on lateral pile response under loading of large eccentricity, Numerical modelling of large diameter piles under lateral loading for offshore wind applications, Author index, Volume 2, Shallow foundations, Prediction and worked example for a sliding foundation on soft clay, Effects of drainage on the response of a sliding subsea foundation, Undrained bearing capacity of skirted mudmats on inclined seabeds, Three-dimensional limit analysis of rectangular mudmat foundations, Collision of double hull tanker with gravity base foundation of offshore wind turbine: case of horizontal drift and swell, Some key aspects in geotechnical design of GBS foundations on sand, A framework for the design of sliding mudmat foundations, Undrained vertical bearing capacity of perforated shallow foundations, Simulation of a full-scale test on a gravity base foundation for offshore wind turbines using a high cycle accumulation model, System integration of direct on-seabed sliding foundations, Anchoring systems, Pullout capacity of plate anchors in sand for floating offshore wind turbines, Centrifuge model study on pullout behavior of plate anchors in clay with linearly increasing strength, Large deformation numerical analysis of plate anchor keying process, The role of partly remoulded clay in fluke and plate anchor design, Numerical modeling of drag anchors of floating structures – comparison of ultimate, holding capacity with limit equilibrium methods, Design and performance of suction embedded plate anchors, Soil flow mechanism around deeply embedded plate anchors during monotonic and sustained uplifts, Comparison between FEM analyses and full-scale tests of fluke anchor behavior in silty sand, Dynamically Installed Anchors: Performance of embedded mooring chain profile in clay, A review of anchor technology for floating renewable energy devices and key design considerations, Numerical modelling of the SEPLA during keying process, Behavior of Suction Embedded Plate Anchors with flap during keying in clay, Chain configuration in sand, theory and large scale field testing, Cyclic response of shallow helical anchors in a medium dense sand, Numerical investigation on line tension-induced pore pressure accumulation around an embedded plate anchor, Behaviour of OMNI-Max anchors under chain loading, Geohazards and integrated studies, Predictions of ice scour loads from small scale tests under 1 g conditions, Areas 2 and 5 offshore Mozambique: Mass-movements on a deep-water margin with scant adjacent shelf, Turbidity current hazard assessment for field layout planning, Bayesian mechanistic imaging of two-dimensional heterogeneous elastic media from seismic geophysical observations, Optimization of deep-water pipeline routes in areas of geologic complexity – an example from the Southern Gulf of Mexico, Understanding the element of time in probabilistic submarine slope stability analyses, Effect of fines on mechanical properties of methane hydrate bearing sands, Numerical analysis of submarine debris flows based on critical state soil mechanics, The life cycle of geohazards within an offshore engineering development, Numerical analysis of stability of seafloor slope under linear waves, Offshore 1D infinite slope modeling in seismic conditions with OpenSees, Numerical simulations of shallow gas migration in vicinity of platforms in offshore Malaysia: Effects of relief wells on excess pore pressure dissipation, Geotechnology – Converting site investigations into 3D geotechnical models, Weak interlayers effects on seismic performance of a deepwater slope, Integration of very-high-resolution seismic and CPTU data from a coastal area affected by shallow landsliding – the Finneidfjord natural laboratory, Influence of gas hydrate dissociation on mechanical properties of gas hydrate-bearing sediment, Soil characterisation and modelling, Effect of pore pressure build-up on the seismic response of sandy deposits, Potential of estimating relative density by measuring shear wave velocity in field and in laboratory, Strength of a carbonate silt at the solid-fluid transition and submarine landslide run-out, Results of geotechnical characterization in the laboratory of clays from offshore Mozambique, Temperature effects on laboratory measured strength on deep water soft clays, Procedures for estimating hysteretic foundation damping, Development of nonlinear foundation springs for dynamic analysis of platforms, Planning of soil investigation for GBS foundation design, Characterization of in-situ effective stress profiles in clays based on piezo-cone penetration test (CPTU) results, New standards and practice of Arctic offshore soil investigation (by Russian experience), Piezocone evaluation of undrained strength in soft to firm offshore clays, Idealized load composition for determination of cyclic undrained degradation of soils, A new piston sampler for a remotely operated drilling system, Some characteristics of carbonate sediments from NorthWest Shelf,Western Australia, Predictive equations of shear wave velocity for Bay of Campeche sand, Strain ?50 and stiffness ratio (E50/Su) for Gulf of Mexico clays, Suitability of Masing rules for seismic analysis of offshore carbonate sediments, Simulation and experimental study of soil behaviors under principal stress rotations, Strength parameters for suction anchors in a high plasticity Ghana clay, The Maximum-Entropy Meshless method for dynamic and coupled analysis of offshore geotechnical problems, Shear wave velocity and shear modulus in offshore clays, In situ and laboratory testing, Method dependency for determining maximum and minimum dry unit weights of sands, Shear strength of dense to very dense Dogger Bank sand, Assessment of dissipation tests in silty soils with standard and non-standard decay, Stiffness degradation and damping of carbonate and silica sands, Cyclic laboratory testing of chalk to improve the reliability of piled foundation design, Measurement and interpretation of downhole seismic probe data for estimating shear wave velocity in deep-water environments, The variation of the T-bar bearing capacity factor at shallow depths, Weak fractured rock coring via a seafloor based drilling system – a case study, Measurement uncertainty of offshore Cone Penetration Tests, An instrumented sampler and its application for suction caisson design, Comparison of shear modulus from SCPT, PS logging & laboratory tests of offshore Myanmar, Visualizing the failure surface of a laboratory vane shear in soft clay using transparent surrogate soil, A specialized triaxial testing technique for deep-sea pressure core sediments, Numerical investigation of ball penetrometer performance in dense sand overlying uniform clay, Rock-steel interface testing and considerations for gravity foundations for tidal energy generators, Jack-up units, The effects of jack-up installation procedures on spudcan capacity in offshore carbonate sediments, A finite element study of boulder interaction with spudcans, Findings of the ISSMGE jack-up leg penetration prediction event, Finite element analyses of spudcan – subsea template interaction during jack-up rig installation, Estimation of spudcan penetration using a probabilistic Eulerian finite element analysis, Calculations of leg penetrations of heavy lift jack-up vessels in multi-layered soils, Effects of consolidation during spudcan installation in carbonate silty clay: A dual approach, Squeezing bearing capacity and effects of increasing strength with depth, Stability assessment of A-shaped mudmats of mobile production units, Linear and nonlinear foundation response in dynamic analyses of jack-up structures, Comparison of coupled and decoupled approaches to spudcan-pile interaction, Sinkage analysis of A-shaped jack-up mudmats using the Coupled Eulerian Lagrangian approach, Mariner and Gina Krog jack-up foundation challenges, A novel spudcan design for improving foundation performance, Jack-up spudcan penetration analysis: Review of semi-analytical and numerical methods, Design, risk and reliability, A perspective on selecting design strength: Gulf of Mexico deepwater clay, Reliability-based design optimization of laterally loaded monopile foundations for offshore wind turbines, A reliability approach to cable risk assessment, Approach for the calibration of the load and resistance factors for axial pile capacity calculations, Accounting for the spatial variability of soil properties in the reliability-based design of offshore piles, Uncertainty-based characterization of piezocone and T-bar data for the Laminaria offshore site, Comparison of DNV and API design codes for design of suction anchors, A safety concept for penetration analyses of suction caissons in sand, Author index


    Vaughan Meyer