Blar i NTNU Open på forfatter "Nordal, Steinar"
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Effect of piezocone penetration rate on the classification of Norweian silt
Bihs, Annika; Nordal, Steinar; Long, Michael; Paniagua Lopez, Ana Priscilla; Gylland, Anders Samstad (Chapter, 2018)Interpretation of Cone Penetration Tests (CPTU) in intermediate soils is complex due to partially drained conditions during penetration. In order to gain more insight into the material behavior of silt during a CPTU, an ... -
Effect of Testing Temperature on Stiffness, Strength and Apparent Sample Disturbance in Quick Clay Samples from NGTS Quick Clay Site Flotten
Almås, Oddvar Lein (Master thesis, 2018)The effect of temperature on laboratory measurements of soil strength and stiffness has occasionally been revisited as a research topic since the 1960 s. Previous studies indicate that both preconsolidation pressure and ... -
Effective Stress based Model for Natural Soft Clays incorporating Restructuration
Bjerre, Jesper; Rønningen, Jon Abusland; Grimstad, Gustav; Nordal, Steinar (Chapter, 2018)Several advanced constitutive models have been developed over the last decades to reproduce the mechanical response of natural soft clays observed during laboratory testing and in the field. Features such as anisotropy, ... -
Effective stress models for soft Scandinavian clays
Rønningen, Jon A. (Doctoral theses at NTNU;2019:329, Doctoral thesis, 2019)The modelling of soft Scandinavian clays requires an effective stress based approach, if a complete stress response is to be provided for different loading conditions. Although, the observed behavior is complex, it is seen ... -
Effectiveness of resistivity cone penetration tests in salt-treated highly sensitive clay
Helle, Tonje Eide; Long, Michael; Nordal, Steinar; Aagaard, Per (Journal article, 2017)Salt wells filled with potassium chloride may be used as landslide mitigation in highly sensitive quick clays, as the changed pore-water composition permanently improves the remoulded shear strength. To verify improvements, ... -
Effects of Drilling for Tieback Anchors on Surrounding Ground: Results from Field Tests
Lande, Einar John; Karlsrud, Kjell; Langford, Jenny; Nordal, Steinar (Peer reviewed; Journal article, 2020)A full-scale field test program was carried out to investigate the effects of drilling for tieback anchors on the surrounding ground. The test anchors were drilled from the ground surface through a soft clay deposit and ... -
Effekt av anisotropi på udrenert skjærstyrke i naturlige skråninger
Isachsen, Marit (Master thesis, 2012)Anisotropi har stor innvirkning på den udrenerte skjærstyrken i leire. I dag er NGI-ADP modellen implementert i elementmetodeprogrammet Plaxis, men modellen tar kun hensyn til anisotropi på deviatoriske spenninger, og egner ... -
Effekt av vibrasjoner generert ved pelearbeider: komprimeringseffekt i sand/grus
Strømme, Terje (Master thesis, 2012)Dette prosjektet tar for seg effekter av peleramming i sand. Fokuset i oppgaven er effektene av vibrasjonene og eventuelle komprimeringer de medfører. Studiet har hatt størst fokus på selve vibrasjonene og i noe mindre ... -
Entrainment of Bed Sediments by Debris Flow
Sherchan, Bigyan (Master thesis, 2016)Debris flows have proved to be a major worldwide hazard for more than 100 years owing to the destruction of lives, property and infrastructures. This occurrence of debris flows is likely to increase in the future due to ... -
Evaluation of unwanted drilling effects: In-situ measurements compared to finite element simulations
Sagmoen, Sondre (Master thesis, 2017)In the latter years, there has been an increasing interest in unwanted settlements and damages occurring on neighboring infrastructure due to foundation work. There has been a research project going from 2012 to 2015 ... -
Field and Laboratory Investigations to Evaluate the Coefficient of Earth Pressure at Rest - NGTS Flotten Quick Clay Test Site
Ofstad, Christian Strømme; Lindgård, Anders (Master thesis, 2017)The coefficient of earth pressure at rest is a key geotechnical parameter, required in almost any investigation of material behaviour. A review of literature on the in situ and laboratory determination of K0' has been ... -
Finite Element Analysis of Coupled Thermo-Hydro-Mechanical Processes in Fully Saturated, Partially Frozen Soils
Rostami, Hooman (Master thesis, 2017)Interest in permafrost, or seasonally frozen ground, has been increasing over the last decades. Nearly 24% of the northern hemisphere, is covered with permafrost. Humankind's need for energy and raw materials has pushed ... -
Formulation of non-coaxial plastic dissipation and stress–dilatancy relations for geomaterials
Tsegaye, Anteneh Biru; Benz, Thomas; Nordal, Steinar (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 ... -
Geotechnical and Geological Characterization of a Quick Clay Site at Flotten,Trondheim
Gella, Konjit Paulos (Master thesis, 2017)This work presents the geotechnical and geological characterization of a quick clay site at Flotten which is one of NTNU s research sites in Trondheim, Norway. To characterize the material, number of laboratory tests were ... -
Hofstad tunnel excavation
Hassan, Mushfiq (Master thesis, 2019)Hofstadtunnelen is situated under Melhus municipality, Trondheim. Tunnel was constructed back in 2003 to allow free traffic flow of a intercity highway called E6 by allowing two local roads passing over it. Plan is to ... -
Implementation of non-newtonian rheology for debris flow simulation with REEF3D
Fornes, Petter; Bihs, Hans; Thakur, Vikas Kumar Singh; Nordal, Steinar (Journal article, 2017)Landslides triggered by hydro-meteorological processes are a serious natural hazard in many areas of the world. The landslides of the debris flow type are often triggered by extreme precipitation events. These landslides ... -
Implementation of non-newtonian rheology for granular flow simulation
Fornes, Petter; Bihs, Hans; Nordal, Steinar (Chapter, 2017)Landslides of the debris flow type pose a serious natural hazard. These land-slides are often triggered by hydro-meteorological processes during extreme precipitationevents. Debris flows usually form a dense flow composed ... -
Improving the post-failure properties in quick clays by treatment with potassium chloride
Helle, Tonje Eide; Aagaard, Per; Nordal, Steinar (Chapter, 2017)Installation of salt wells filled with potassium chloride may be used as a ground improvement method in quick-clay hazard areas. The migration of potassium chloride is self-driven by molecular diffusion. The effectiveness ... -
In Situ Improvement of Highly Sensitive Clays by Potassium Chloride Migration
Helle, Tonje Eide; Aagaard, Per; Nordal, Steinar (Journal article; Peer reviewed, 2017)Highly sensitive, low-saline clays, termed quick clays, represent a risk for large landslides. An in situ experiment was conducted in which salt wells filled with potassium chloride were installed to study how salt wells ... -
Initial settlements of rock fills on soft clay
Pedersen, Truls Martens (Master thesis, 2012)Rock fills that hit the seabed will remold the underlying material. If this material is a clay with sufficiently low shear strength, it will adopt rheological properties, causing flow through the rock fill, and contributing ...