Blar i NTNU Open på forfatter "Høien, Are Håvard"
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A STUDY OF FAILURE IN FRICTIONAL AND LOW-COHESIVE MATERIALS UNDER THE LOAD OF GROUND ANCHORS THROUGH SMALL-SCALE PHYSICAL MODEL TESTS AND NUMERICAL SIMULATIONS
Høgset, Hanna Margrete (Master thesis, 2021)Forankringsstag, eller ankere, er strukturelle legemer som overfører påførte strekkspenninger til grunnen ved et bestemt dyp. Per dags dato er det begrenset kunnskap på hvordan brudd initieres og propagerer gjennom ... -
Analyse av sammenhenger mellom MWD-data og bergmekaniske parametre
Rødseth, Marianne K (Master thesis, 2013)Measurement While Drilling (MWD) benyttes i dag i de fleste tunnelprosjektene som er under driving i Norge. Det er et system som benytter responsen fra boreprosessen for å tolke hardhet, oppsprekking og vann i bergmassen ... -
Analysis of the stabilising effect of ribs of reinforced sprayed concrete(RRS) in the Løren road tunnel
Høien, Are Håvard; Nilsen, Bjørn (Journal article; Peer reviewed, 2018)The Løren tunnel is a road tunnel at Ring road 3 in Oslo, Norway. The tunnel has a length of 915 m in rock, has two tubes with three lanes and breakdown fields, and was first opened in 2013. For rock support in the case ... -
Applicability of Reinforced Ribs om Sprayed Concrete in Sections of Poor Quality and Swelling Rock Mass
Høien, Are Håvard (Doctoral theses at NTNU;2018:314, Doctoral thesis, 2018)When excavating tunnels, reinforcement and support is required depending on the quality of the rock mass. In good quality rock mass, simple reinforcement such as sprayed concrete and rock bolts is usually adequate as ... -
Development of an automation method to conduct sensitivity analysis on weakness zones using Finite Element Modelling - with focus on total deformations
Kaasbøll Andresen, Eirik (Master thesis, 2022)I områder med harde bergarter, tilsvarende det Norske geologiske landskapet, er svakhetssoner en av de viktigste årsakene til stabilitetsrelaterte problemstillinger møtt i tunnelindustrien. Det er derfor nødvendig å få ... -
Experimental triaxial testing of swelling gouge materials
Høien, Are Håvard; Nilsen, Bjørn; Vistnes, Gunnar; Olsson, Roger (Journal article; Peer reviewed, 2019)Adequate rock support in weakness zones that may contain swelling minerals poses one of the main challenges of excavating tunnels in hard rock conditions. Deformations under such conditions are influenced by several factors, ... -
Full-scale pullout tests of rock anchors in a limestone quarry focusing on bond failure at the anchor-grout and grout-rock interfaces
Grindheim, Bjarte; Li, Charlie Chunlin; Høien, Are Håvard (Peer reviewed; Journal article, 2023)Rock anchors are a common safety measure for stabilising large-scale infrastructure, such as bridge towers, retaining walls, rock slopes and windmills. There are four principal failure modes for rock anchors: (a) tensile ... -
A Hybrid Methodology of Rock Support Design for Poor Ground Conditions in Hard Rock Tunnelling
Terron-Almenara, Jorge; Holter, Karl Gunnar; Høien, Are Håvard (Peer reviewed; Journal article, 2023)The design of rock support in hard rock tunnelling is often assisted by the use of empirical engineering rock mass classification systems. This has involved support design in a wide variety of geological- and rock ... -
Investigating Load Arches and the Uplift Capacity of Rock Anchors: A Numerical Approach
Grindheim, Bjarte; Trinh, Nghia Quoc; Li, Charlie Chunlin; Høien, Are Håvard (Journal article; Peer reviewed, 2024)Rock anchors, which can withstand substantial forces and are essential for securing the foundations of the built environment, can fail due to steel tensile failure, bond detachment, or rock mass fracturing through uplift. ... -
Main aspects of deformation and rock support in Norwegian road tunnels
Høien, Are Håvard; Nilsen, Bjørn; Olsson, Roger (Journal article; Peer reviewed, 2019)The general geology of Norway makes most of its tunnels to be constructed mainly in strong rock intersected by weakness zones of different sizes and characteristics. The Norwegian support tradition is, to the largest degree ... -
Pull-out and critical embedment length of grouted rebar rock bolts - mechanisms when approaching and reaching the ultimate load
Høien, Are Håvard; Li, Charlie Chunlin; Zhang, Ning (Peer reviewed; Journal article, 2021)Rock bolts are one of the main measures used to reinforce unstable blocks in a rock mass. The embedment length of fully grouted bolts in the stable and competent rock stratum behind the unstable rock blocks is an important ... -
Small Block Model Tests for the Behaviour of a Blocky Rock Mass Under a Concentrated Rock Anchor Load
Grindheim, Bjarte; Aasbø, Karsten Sannes; Høien, Are Håvard; Li, Charlie Chunlin (Peer reviewed; Journal article, 2022)Rock anchors are used to stabilise large-scale infrastructure such as the foundations of high buildings or road cuts, and their failure could lead to severe economic and social consequences. A rock anchor can fail in one ... -
Stabilitetsanalyse av bergskjæringer med vurdering av passiv og aktiv bergsikring
Austad, Johanne (Master thesis, 2022)Ved etablering av bergskjæringer vil analyse og vurdering av stabilitet være nødvendig for å opprettholde sikkerheten langs veien. For at resultatene fra stabilitetsberegningene skal være pålitelige er det avgjørende med ...