... thrust geologist friction reducer penetration dense sand geology seafloor cpt system investigation lubrication innovative geotechnology drilling vessel illustration social responsibility refusal mechanical friction reducer situ data penetration performance Innovative Geotechnologies...

... extent. Therefore, a rigorous laboratory programme was performed to consistently investigate the impact of specimen height on BE G max measurements of a clean dense sand. The results were compared with BE G max values from triaxial and resonant column test setups. The interpretation...

... ABSTRACT: An experimental campaign is conducted on 100g centrifuged monopile model, impact driven, into saturated dense sand, down to three embedding depths, corresponding to three slenderness ratios of 5, 4 and 3. These monopiles models are horizontally loaded after the installation without...

... in the database with D of 4.3 m and L / D >20 are well predicted by the CPT methods. The new series of lateral tests and other tests reported in the literature indicate that the lateral stiffness of vibrated piles in medium dense and dense sand is between 80% and 90% of that of driven piles. 1...

... sedimentology artificial intelligence impedance inversion lithostratigraphy sedimentary geology geological subdiscipline implication foundation design reflection acoustic impedance inversion shallow subsurface windfarm zone boundary vardy dense sand inversion depositional environment hollandse...

... with a Modified Mohr Coulomb soil model, modified to more accurately capture the dilative behaviour of very dense sand, reduced the uncertainty on the predicted leg penetration significantly and provided more insight into whether or not a punch through scenario was to be expected. 1 Introduction 1.1...

.... 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...

... ABSTRACT: Plate anchors offer a cost-effective anchoring solution for offshore floating energy devices. This study aims to investigate the uplift capacity of horizontal plate anchors in dense sand using the critical state-based model NorSand implemented in finite element (FE) software Abaqus...

... ABSTRACT: This study investigates the performance of circular plate anchors under vertical cyclic loads in dense sand. A numerical analysis implementing SANISAND-MS constitutive model is employed to capture the accumulated displacement under cyclic loading. The variation in mean load, cyclic...

... ABSTRACT: Vibro-hammers are being increasingly considered for the installation of offshore piles due to increased speed and reduced noise pollution. However, there are still concerns regarding the effectiveness of vibro-hammers in a range of soil profiles including dense sands and high...

... term vented capacity in medium dense sand but caused a reduction of approximately 20% in dense sand. Allowing a time interval of a day or more between installation and extraction increased the vented tensile capacity for tests in both samples involving monotonic installation. For the tests involving...

... subdiscipline skin friction installation radial stress geology reservoir geomechanics resistance stiffness pile installation engineering friction fatigue vibratory driving effect shear cycle installation method lateral response loading pile wall lateral stiffness dense sand Session 19...

... in dense sand. 1 Introduction The new ISO/API design method (Lehane et al., 2020) has changed how driven piles under axial loading are designed offshore. To calibrate the design method, high quality static load tests were compiled (Lehane et al. , 2017), building on previous databases such as the ZJU...

... vibration in the plough and surrounding ground. This paper reports the findings of a pilot study looking at the effects of plough vibration on tow forces and plough depth. The results show that vibration at 77–102Hz resulted in increased plough depth by up to 38% in dense sand, with limited average...

... of the methods and a parametric study of piles in medium dense to very dense sand. The study highlights the predicted dependency of the unit skin friction on pile diameter for some of the CPT methods. This study is part of a larger effort to document the adequacy and reliability of axial capacity calculation...

... are unlikely to provide accurate predictions of the response of more rigid monopiles to loading. This paper presents the results of a field test performed on an instrumented monopile installed at a dense sand research site in Blessington, Ireland. The pile, which had an external diameter of 340mm, was driven...

... to evaluate the accuracy of existing driveability approaches for larger diameter piles installed in dense sands. It also investigates the feasibility of applying more recent static capacity models, namely the Imperial College Pile (ICP) and University of Western Australia (UWA-05) methods to pile driveability...

... leg length and punch-through are issues, less atten- tion is given to sand sites. At a dense sand site this is understandable, as spudcan penetration tends to be small. Therefore, a prediction based on general shear failure, using measured laboratory data, is suffi- ciently accurate. However, in loose...

... 28 30 50 67 27 0.8 0.5 7.5 2.0 9.0 Dense fine to medium sand 29 9.5 9.0 11.0 Stiff clay with sand layers 20 100 40 15 0.2 10.0 11.0 15.0 Dense sand with gravel 28 9.0 15.0 20.0 Medium dense fine sand 30 10.0 20.0 29.0 Dense fine to medium sand 30 10.0 29.0 31.0 Dense sand with clay layers 25 10.0...

.... In the early 1980s Shell U.K. Exploration and Production (Shell Expro) identified a need to improve design methods for its offshore structures, especially those relating to pile capacity in dense sand. To that end Shell Expro commis- sioned a major review of end bearing, for which a sum- mary has been...