Norwegian Geotechnical Institute (NGI) Digital Archive: Recent submissions
Now showing items 1-20 of 333
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Fatigue sensitivity to foundation modelling in different operational states for the DTU 10MW monopile-based offshore wind turbine
(Peer reviewed; Journal article, 2019)The importance of foundation modelling for the support-structure fatigue damage estimation of a 10 MW monopile based offshore wind turbine is investigated in different operational states and wind-wave misalignment conditions. ... -
Characterization of two sites for geotechnical testing in permafrost: Longyearbyen, Svalbard
(Peer reviewed; Journal article, 2019)The mean annual air temperature in Svalbard has increased between 3 ℃ and 5 ℃ during the last 40 to 50 years. The continuous warming trend observed in Svalbard during the last 30 years has raised concerns about the stability ... -
Leachate emissions of short- and long-chain perand polyfluoralkyl substances (PFASs) from various Norwegian landfills
(Peer reviewed; Journal article, 2019)Restrictions on the use of long-chain per- and polyfluoralkyl substances (PFASs) has led to substitutions with short-chain PFASs. This study investigated the presence of four short-chain PFASs and twenty-four long-chain ... -
Halden research site - Site characterisation and engineering properties of Halden silt
(NGI-Rapport;20160154-05-R, Report, 2019-10-02)Halden silt site is property of Halden municipality and it is known locally as Rødsparken. As part of the fully characterization of Halden silt site during NGTS project, two main reports are prepared: 1) a factual report ... -
Numerical modeling of liquefaction and its impact on anchor piles for floating offshore structures
(Peer reviewed; Journal article, 2019)Anchor piles and suction anchors have been used for anchoring different types of offshore structure in the past four decades. The recent growing interest and demand for wind energy has motivated the industry to evaluate ... -
Probabilistic Seismic Hazard Analysis of A CO2 Storage Prospect Using the NGA East Ground Motion Models
(Lecture, 2019)The Smeaheia fault block in the North Sea is a site under consideration for large scale CO2 storage. Even though the overall earthquake hazard in the North Sea is low, it is necessary to evaluate the risk related to ... -
Deliverable 2.3. Template for communicating scientific information and results
(NGI Rapport;20170408-06-R Rev. 1, Report, 2019-09-09)In the framework of the EVOKED project scientific information on different types of potential climate-change impacts has been developed. The aim is to translate these climate data into valuable and useful climate services. ... -
Field verification tests of the newly developed flow cone tool—In-situ measurements of hydraulic soil properties
(Peer reviewed; Journal article, 2019)Hydraulic soil properties, and in particular the hydraulic conductivity, is important in a number of geotechnical design cases. However, attention is often drawn towards the method of analysis rather than the quality and ... -
Øysand research site: Geotechnical characterisation of deltaic sandy-silty soils
(Journal article; Peer reviewed, 2019)This paper describes the geology and geotechnical engineering properties of the fluvial and deltaic gravelly-sandy-silty sediments at Øysand, Norway. Geophysical and geotechnical site investigations carried out between ... -
Characterization and engineering properties of the NGTS Onsøy soft clay site
(Peer reviewed; Journal article, 2019)In the 1960s, NGI investigated numerous potential research sites and established the first Onsøy soft clay site in 1968. In 2016, the NGTS project established five research sites, one of which is the NGTS Onsøy soft clay ... -
The partitioning of Sb in contaminated soils after being immobilization by Fe-based amendments is more dynamic compared to Pb
(Peer reviewed; Journal article, 2019)Soils and sediments from shooting ranges can be heavily contaminated with metals and metalloids that can leach significant concentrations into the environment. To prevent trace element leaching, contaminated soils must be ... -
Engineering properties of low to medium overconsolidation ratio offshore clays
(Peer reviewed; Journal article, 2019)This paper presents a summary of the geotechnical engineering properties of low to medium overconsolidation ratio offshore inorganic clays derived from a high quality database. These properties, such as preconsolidation ... -
Reservoir assessment of Middle Jurassic sandstone-dominated formations in the Egersund Basin and Ling Depression, eastern Central North Sea
(Peer reviewed; Journal article, 2019)Reservoir quality assessment was conducted from petrophysical analysis and rock physics diagnostics on 15 wells penetrating Middle Jurassic sandstone reservoir formations in different regions of the eastern Central North ... -
A geochemical, mineralogical and geotechnical characterization of the low plastic, highly sensitive glaciomarine clay at Dragvoll, Norway
(Peer reviewed; Journal article, 2019)The sediments at the NTNU research site Dragvoll, Trondheim, Norway accumulated in seawater close to the glacier front during the Pleistocene-Holocene transition. A comprehensive site investigation and laboratory test ... -
Investigation and geotechnical characterization of Perniö clay, Finland
(Peer reviewed; Journal article, 2019)Understanding the behavior of soft sensitive clays is a key aspect of geotechnical design, especially in those regions where constructions are planned in marine clay areas. In Finland, one of the major geotechnical issues ... -
Advantages and limitation of using 2-D FE modelling for assessment of effect of mitigation measures for railway vibrations
(Peer reviewed; Journal article, 2019)This paper addresses mitigation measures against railway vibrations in soft soils by use of FE calculations. In order for calculation models to be used as design tools, it is essential that they are relatively easy to set ... -
Cements for tunnel grouting – Rheology and flow properties tested at different temperatures
(Peer reviewed; Journal article, 2019)This paper presents work being carried out in Work Package 3 of TIGHT (True Improvement in Grouting High pressure Technology for tunnelling) project. The objective is to investigate flow and mechanical properties of three ... -
Seismic considerations in design of offshore wind turbines
(Peer reviewed; Journal article, 2018)Interest in renewable and clean energy over the past decade has motivated immense research on wind energy. The main issues in design of offshore wind turbines in regions of recent development have been aero- and hydro-dynamic ... -
Inferring microseismic source mechanisms and in situ stresses during triaxial deformation of a North-Sea-analogue sandstone
(Peer reviewed; Journal article, 2019)Monitoring microseismic activity provides a window through which to observe reservoir deformation during hydrocarbon and geothermal energy production, or CO2 injection and storage. Specifically, microseismic monitoring may ... -
Effect of foundation type and modelling on dynamic response and fatigue of offshore wind turbines
(Peer reviewed; Journal article, 2019)This paper presents dynamic response and fatigue analyses of several bottom‐mounted offshore wind turbine (OWT) models, simulated in the aero‐hydro‐servo‐elastic simulation tool FAST. The distinction between the models is ...