... 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...

... 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...

... 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...

... 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...

.... 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...

... 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...

... 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...

... 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...

..., 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...

... 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...

... 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...

... 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...

... 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...

.... 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...

... 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...

... 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...

... 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...

... 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...

... 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...

... 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...