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Keywords: penetration
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Proceedings Papers
Enhancement of the Seafloor CPT – A Solution to Acquire Improved in Situ Data Earlier, Faster and Greener
Available to PurchasePublisher: Society of Underwater Technology
Paper presented at the Offshore Site Investigation Geotechnics 9th International Conference, September 12–14, 2023
Paper Number: SUT-OSIG-23-032
... ABSTRACT: The offshore wind industry relies heavily on cone penetration testing (CPT) for site characterization of wind farm sites. The CPT performed in downhole (drilling) mode has the largest impact on the detailed site investigation costs and drilling vessel time. Due to the unprecedented...
Proceedings Papers
Comparative Assessment of Differing In-Situ Degradation Behaviour in Offshore Silt and Sand Soils Using Cyclic and Dual Sleeve Piezocone Penetration Tests
Available to PurchasePublisher: Society of Underwater Technology
Paper presented at the Offshore Site Investigation Geotechnics 9th International Conference, September 12–14, 2023
Paper Number: SUT-OSIG-23-033
... ABSTRACT: Modified Piezocone Penetration Testing (CPTu) methods, including the Cyclic CPTu and Dual Sleeve CPTu, have been deployed in offshore geotechnical investigations to aid evaluation of in-situ soil characterisation. Both techniques involve large strain amplitude shearing of the soil...
Proceedings Papers
The FFCPT - An Innovative and Cost-Effective Option for Supplementary Offshore Windfarm Reconnaissance Data Acquisition
Available to PurchasePublisher: Society of Underwater Technology
Paper presented at the Offshore Site Investigation Geotechnics 9th International Conference, September 12–14, 2023
Paper Number: SUT-OSIG-23-034
... ABSTRACT: This paper presents the Free Fall Cone Penetration Test (FFCPT) as an accomplished, proven and efficient methodology developed for maritime defense and marine geotechnical surveys. The FFCPT can be used to investigate a wide variety of seafloor sediment types and was designed...
Proceedings Papers
Evaluation of Pile Driveability Predictions in Sand
Available to PurchasePublisher: Society of Underwater Technology
Paper presented at the Offshore Site Investigation Geotechnics 9th International Conference, September 12–14, 2023
Paper Number: SUT-OSIG-23-080
... resistance alm & hamre pile location geology site 1 jacket pile example location blowcount resistance monopile penetration site 2 north sea subsea system penetration depth site 3 driveability prediction pile driveability prediction soil condition hammer Innovative Geotechnologies...
Proceedings Papers
Airborne Noise Emission Measurement During Near-Shore Monopile Installation in the Netherlands
Available to PurchasePublisher: Society of Underwater Technology
Paper presented at the Offshore Site Investigation Geotechnics 9th International Conference, September 12–14, 2023
Paper Number: SUT-OSIG-23-082
.... noise emission airborne noise emission measurement prediction noise level pile surface area driveability analysis hammer energy installation noise emission penetration propagation surface area airborne noise near-shore monopile installation receiver Innovative Geotechnologies...
Proceedings Papers
Experimental Investigations on Monopile Tip Buckling During Impact Driving
Available to PurchasePublisher: Society of Underwater Technology
Paper presented at the Offshore Site Investigation Geotechnics 9th International Conference, September 12–14, 2023
Paper Number: SUT-OSIG-23-085
... of the pile penetration process. For the design of monopiles, there is no established method for assessment of the potential damage of pile tip during the installation. This paper presents results of small-scale model testing of pile buckling during impact driving in sand. Results from 1g model tests using...
Proceedings Papers
The Interaction of Thin Metal Plate and Circular Rigid Boulder in Undrained Clay: 2D Physical and Numerical Models
Available to PurchasePublisher: Society of Underwater Technology
Paper presented at the Offshore Site Investigation Geotechnics 9th International Conference, September 12–14, 2023
Paper Number: SUT-OSIG-23-086
... ABSTRACT: Progressive buckling of thin-walled open-ended piles can occasionally occur during installation, especially when the pile penetrates through hard materials, or where there are subsea obstructions, typically in clays, such as boulders. The distortion initiated at the pile tip due...
Proceedings Papers
The Influences of Drilling Parameters on the Rate of Penetration in Rock Rotary-Percussive Drilling Process
Available to PurchasePublisher: Society of Underwater Technology
Paper presented at the Offshore Site Investigation Geotechnics 9th International Conference, September 12–14, 2023
Paper Number: SUT-OSIG-23-102
... ABSTRACT: The rotary-percussive drilling is commonly-used for geotechnical investigation. The rate of penetration (ROP) is critical to the construction period of geological drilling, and the setting of drilling parameters directly affects ROP. To clarify the influence of drilling parameters...
Proceedings Papers
Three-Dimensional DEM Simulation of Plugging Behaviour of Small-Diameter Open-Ended Model Piles Penetrating into Sand
Available to PurchasePublisher: Society of Underwater Technology
Paper presented at the Offshore Site Investigation Geotechnics 9th International Conference, September 12–14, 2023
Paper Number: SUT-OSIG-23-107
..., three-dimensional discrete element method (DEM) simulations have been undertaken of small model piles’ penetration in virtual calibration chamber tests. The analyses employed the open-source MUSEN framework and took advantages of graphics processing unit (GPU) acceleration, particle refinement...
Proceedings Papers
Rate Effects Increasing Lateral Capacity of Monopiles
Available to PurchasePublisher: Society of Underwater Technology
Paper presented at the Offshore Site Investigation Geotechnics 9th International Conference, September 12–14, 2023
Paper Number: SUT-OSIG-23-113
... rate dependent soil model is done by means of laboratory tests and full-scale spudcan penetration tests at different penetration rates. The FEA of the monopile with the rate dependent soil model showed a considerable increase in lateral resistance for the representative ULS load case when compared...
Proceedings Papers
Set-Up Effects of Dynamically Installed Anchors
Available to PurchasePublisher: Society of Underwater Technology
Paper presented at the Offshore Site Investigation Geotechnics 9th International Conference, September 12–14, 2023
Paper Number: SUT-OSIG-23-139
... to reliably predict the performance under in-situ conditions. For that purpose, fully coupled stress-equilibrium and pore pressure dissipation finite element analyses were performed. The anchor penetration was simulated with a prescribed penetration rate and the stress state and pore pressure field...
Proceedings Papers
Spudcan Penetration Assessment Using LDFEA and Comparison with Field Observations
Available to PurchasePublisher: Society of Underwater Technology
Paper presented at the Offshore Site Investigation Geotechnics 9th International Conference, September 12–14, 2023
Paper Number: SUT-OSIG-23-179
... ABSTRACT: For jack-up sites in the North Sea where strong layers overlay weaker ones (classic punch through scenario), the use of large deformation finite element analysis can be of great support to achieve more accurate predictions of the spudcan penetration. As opposed to conventional...
Proceedings Papers
Comparative Evaluation of Approaches for Modelling Footing Penetration in Layered Soils During Jack-up Installation
Available to PurchasePublisher: Society of Underwater Technology
Paper presented at the Offshore Site Investigation Geotechnics 9th International Conference, September 12–14, 2023
Paper Number: SUT-OSIG-23-180
... ABSTRACT: Prior to any jack-up installation, a Leg Penetration Assessment is generally conducted in order to predict the footing penetration behaviour during installation. The most common methods of analysis follow simplified Rule-Based (RB) approaches (as described in ISO 19905-1 Part 1...
Proceedings Papers
Non-Vertical Spudcan Impacts on a Dense Sandy Seabed: Improving Design Through Centrifuge Modelling
Available to PurchasePublisher: Society of Underwater Technology
Paper presented at the Offshore Site Investigation Geotechnics 9th International Conference, September 12–14, 2023
Paper Number: SUT-OSIG-23-182
.... It is difficult to predict these stresses, particularly for dense sandy seabeds where uncertainty remains regarding shallow penetration resistances developed during high shear rates and reduced drainage. This paper considers the problem through centrifuge modelling with a dense sand sample. A model spudcan...
Proceedings Papers
Two-Dimensional Numerical Simulation of Displacement Pile-Wall Penetration Using a Coupled Discrete Element-Finite Difference Method
Available to PurchasePublisher: Society of Underwater Technology
Paper presented at the Offshore Site Investigation Geotechnics 9th International Conference, September 12–14, 2023
Paper Number: SUT-OSIG-23-194
... of particles and DEM simulation durations that can be considered. In this study, a two-dimensional numerical simulation of displacement pile-wall penetration in sand is undertaken with a time-saving solution using the coupled discrete element-finite difference method (DEM-FDM). The DEM-FDM numerical results...
Proceedings Papers
Understanding Vibro-Hammer Performance
Available to PurchasePublisher: Society of Underwater Technology
Paper presented at the Offshore Site Investigation Geotechnics 9th International Conference, September 12–14, 2023
Paper Number: SUT-OSIG-23-197
... by the vibro-hammer. The paper aims to provide improved performance predictions by relating the reduction in penetration resistance using established lique-faction analysis methodologies to understand the likely degree of stress reduction induced by the vibro-hammer and the associated reduction in resistance...
Proceedings Papers
Suction Caissons in Intermediate Soils
Available to PurchasePublisher: Society of Underwater Technology
Paper presented at the Offshore Site Investigation Geotechnics 9th International Conference, September 12–14, 2023
Paper Number: SUT-OSIG-23-200
... on the application of potential installation mitigations (i.e. installation pauses, two-way cycles etc.). sustainability sustainable development installation geology resistance penetration geologist flow in porous media caisson fluid dynamics social responsibility reservoir characterization...
Proceedings Papers
Improving Driveability Predictions for Offshore Piles Using Bayesian Optimisation
Available to PurchasePublisher: Society of Underwater Technology
Paper presented at the Offshore Site Investigation Geotechnics 9th International Conference, September 12–14, 2023
Paper Number: SUT-OSIG-23-231
... that driving does not induce excessive fatigue stresses in the pile. The analyses utilise one-dimensional (1D) stress-wave theory to model the forces and displacements in the pile during a hammer blow. The analysis requires information about the pile geometry, the pile penetration, the hammer characteristics...
Proceedings Papers
Penguins Anchor Piles – Driveability Back Analysis
Available to PurchasePublisher: Society of Underwater Technology
Paper presented at the Offshore Site Investigation Geotechnics 9th International Conference, September 12–14, 2023
Paper Number: SUT-OSIG-23-260
... Figure 2) is part of the Penguins Field Redevelopment. The FPSO anchor piles were installed between May and July 2020. subsea system penetration sand layer resistance follower blowcount geology prediction boulder plug installation profile chenicheri pulukul shell diameter seafloor...
Proceedings Papers
Mitigation of Suction Caisson Installation Refusal by Two-Way Cycling – Part I
Available to PurchasePublisher: Society of Underwater Technology
Paper presented at the Offshore Site Investigation Geotechnics 9th International Conference, September 12–14, 2023
Paper Number: SUT-OSIG-23-201
... this risk by reducing the soil resistance, thereby reducing the required suction pressure for penetration. In this Part I, of a four-part companion paper series, a proposed empirical method will be introduced which derives the reduced resistance observed during pressure cycling and demonstrates the effects...
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