Browsing Norwegian Geotechnical Institute (NGI) Digital Archive by Title
Now showing items 179-198 of 439
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Facilitating microplastic quantification through the introduction of a cellulose dissolution step prior to oxidation: Proof-of-concept and demonstration using diverse samples from the Inner Oslofjord, Norway
(Peer reviewed; Journal article, 2020)Identifying and quantifying microplastic in marine samples can be facilitated by removing natural organic matter (NOM). Cellulosic material, like chitin, however, are a type of NOM that is resistant to chemical digestion, ... -
Factual report - Halden research site
(NGI-rapport;20160154-04-R Rev. 1, Report, 2020-01-06)Halden silt site is property of Halden municipality and it is known locally as Rødsparken. As part of the characterization of Halden silt site during NGTS project, two main reports are prepared: 1) a factual report ... -
Factual Report - Permafrost Research Site
(NGI-rapport;20160154-06-R, Report, 2020-01-01)Two benchmark sites are established near Longyearbyen, Svalbard (78°13’N, 15°28’E) for long-term geotechnical testing and evaluation of field investigation methods in perennially frozen soils (i.e. permafrost). These sites, ... -
Factual report - Øysand research site
(NGI-rapport;20160154-08-R, Report, 2020-01-15)As part of the characterization of Øysand Sand site during NGTS project, two main reports are prepared: 1) a factual report (20160154-08-R) and 2) an interpretation report (20160154-09-R) (see figure in the next page). The ... -
Fading positive effect of biochar on crop yield and soil acidity during five growth seasons in an Indonesian Ultisol
(Peer reviewed; Journal article, 2018)Low fertility limits crop production on acidic soils dominating much of the humid tropics. Biochar may be used as a soil enhancer, but little consensus exists on its effect on crop yield. Here we use a controlled, replicated ... -
faSavageHutterFOAM 1.0: depth-integrated simulation of dense snow avalanches on natural terrain with OpenFOAM
(Peer reviewed; Journal article, 2018)Numerical models for dense snow avalanches have become central to hazard zone mapping and mitigation. Several commercial and free applications, which are used on a regular basis, implement such models. In this study we ... -
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. ... -
FE simulation of steady state wave motion in solids combined with a PML approach
(Peer reviewed; Journal article, 2017)This study presents a finite element (FE) framework for simulation of steady state wave motion, combined with a so-called PML approach. The steady state wave motion of current interest are not only time-harmonic load but ... -
Field and Laboratory Test Results from NGTS soft clay site – Onsøy
(NGI-rapport;20160154-10-R, Report, 2019-12-02)In 2017, the Norwegian GeoTest Sites (NGTS) project established five research sites, one of which is the new Onsøy soft clay site located close to Fredrikstad city. This report contains all results from field and laboratory ... -
Field experiments at three sites to investigate the effects of age on steel piles driven in sand
(Peer reviewed; Journal article, 2019)This paper investigates the influences that steel type, in-situ soil properties, water table depth, pile diameter, roughness and driving procedures have on the ageing behaviour of piles driven in sand. Tension tests have ... -
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 ... -
First-time landslides in Vashon advance glaciolacustrine deposits, Puget Lowland, U.S.A.
(Peer reviewed; Journal article, 2018)Advance glaciolacustrine (Qglv) deposits from the last continental glaciation are widespread in the densely populated Puget Lowland and are prone to shallow landsliding. Much less frequently in historic time, new landslides ... -
Fluid flow and pore pressure development throughout the evolution of a trough mouth fan, western Barents Sea
(Peer reviewed; Journal article, 2018)Using a combination of geophysical and geotechnical data from Storfjorden Trough Mouth Fan off southern Svalbard, we investigate the hydrogeology of the continental margin and how this is affected by Quaternary glacial ... -
Fluid‐Rock Interactions in Clay‐Rich Seals: Impact on Transport and Mechanical Properties
(Chapter, 2018)Fluid‐rock interaction in low‐permeable clay‐rich seal units is an important topic for the evaluation of the long‐term seal integrity during geological storage of CO2. In low‐permeable sealing units, the diffusion of CO2 ... -
Fluorinated Precursor Compounds in Sediments as a Source of Perfluorinated Alkyl Acids (PFAA) to Biota
(Peer reviewed; Journal article, 2020)The environmental behavior of perfluorinated alkyl acids (PFAA) and their precursors was investigated in lake Tyrifjorden, downstream a factory producing paper products coated with per- and polyfluorinated alkyl substances ... -
Formulation of non-coaxial plastic dissipation and stress–dilatancy relations for geomaterials
(Peer reviewed; Journal article, 2020)Stress–dilatancy theories play a central role in the modeling of the plastic dissipation of geomaterials. There exist several mathematical frameworks for describing the stress–dilatancy behavior of soils. One of the limiting ... -
Foundation model 1 - 1D an 3D parallel coupled models
(NGI Rapport;20150014-04-R, Report, 2017-01-20)The report presents a macro elements model developed to calculate p-y soil and foundation response during cyclic loading. The concept of parallel coupling of linear elastic perfectly plastic sub-models. One is model ... -
Fourfold Increase in Pumpkin Yield in Response to Low-Dosage Root Zone Application of Urine-Enhanced Biochar to a Fertile Tropical Soil
(Journal article, 2015)A widely abundant and invasive forest shrub, Eupatorium adenophorum, was pyrolyzed in a cost-efficient flame curtain kiln to produce biochar. The resulting biochar fulfilled all the requirements for premium quality, according ...