Browsing NTNU Open by Author "Nordal, Steinar"
Now showing items 41-60 of 133
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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 Small-strain stiffness of Tiller-Flotten Quick Clay and its Anisotropy using Bender Elements
Shahmirzadi, Mohammad sadegh (Master thesis, 2020)Jordegenskaper ved lav tøyning er veldig viktig i mange praktiske geotekniske problemer og seismologi aspekter. Redegjørelse av disse parameterne, inkludert skjærbølgehastighet, tilsvarende lav-tøyning skjærmodulus (Gmaks) ... -
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 ... -
Forhold knyttet til graden av metning under udrenerte treaksialforsøk på leire
Kjønnås, Petter Boge (Master thesis, 2020)Ansamlinger av luft i ulike deler av poretrykksystemet under et udrenert treaksialforsøk er en kjent problemstilling i den geotekniske bransjen. Luft vil dempe det målte poretrykket. Som et resultat vil de kalkulerte ... -
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 ... -
Geotechnical characterization of Halsen-Stjørdal silt, Norway
Bihs, Annika; Long, Mike; Nordal, Steinar (Peer reviewed; Journal article, 2020)The evaluation of geotechnical parameters for design problems in silty soils is complicated due to partially drained conditions and irregular soil structure, including small layers and pockets of both coarser and finer ... -
Globally vs. Locally Trained Machine Learning Models for Landslide Detection: A Case Study of a Glacial Landscape
Ganerød, Alexandra Jarna; Lindsay, Erin Rose Pilaar; Fredin, Ola; Myrvoll, Tor Andre; Nordal, Steinar; Rød, Jan Ketil (Peer reviewed; Journal article, 2023)Landslide risk mitigation is limited by data scarcity; however, this could be improved using continuous landslide detection systems. To investigate which image types and machine learning models are most useful for landslide ... -
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 ... -
Interplay of mass detrainment and the braking effect of forests on small to medium avalanches - An experimental study
Wear, Christopher (Master thesis, 2018)Small-scale testing was conducted on a laboratory avalanche model built to quantify the deceleration of avalanches flowing through alpine forests. The inclination of the chute is given as 35◦, the inclination of the runout ... -
Interpretation methods of CPTU and RCPTU with special focus on soft soils - Assessment between classical approach and data mining techniques
Puakowski, Stanislaw (Master thesis, 2015)The purpose of the following work is to explain numerous methods of interpretation of CPT (Cone Penetration Test) and to find the most practical one for soft soils. Due to the complex nature of the problem and the ... -
Investigation of a Coarse Silt Deposit by Varied Rate CPTU Testing
Bihs, Annika (Doctoral theses at NTNU;2021:320, Doctoral thesis, 2021)Well-explored methods for the interpretation of CPTU and laboratory tests for clay and sand materials exist, assuming undrained and drained conditions, respectively. The determination of design parameters in silt is not ... -
Investigation of debris flow entrainment and mitigation using flexible barriers. Physical and numerical modelling
Vicari, Herve (Doctoral theses at NTNU;2022:351, Doctoral thesis, 2022)Debris flows typically increase in scale by entraining soil, fluid, and boulders along the flow channel. Entrainment is typically modelled according to semi-empirical formulations which do not allow to capture the physical ...