Browsing NTNU Open by Author "Strømsvik, Helene"
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Analyse av injeksjonstestdata, Lyshorntunnelen, E39 Svegatjørn-Rådal
Ida Skjæraasen (Master thesis, 2019)Forskningsprosjektet «TIGHT –True Improvement in Grouting High Pressure Technology» ble opprettet med et mål om å øke forståelsen for hvordan berget påvirkes av ulike injeksjonsparametere, med særlig fokus på bergets respons ... -
Assessment of High Pressure Pre-Excavation Rock Mass Grouting in Norwegian Tunneling
Strømsvik, Helene (Doctoral theses at NTNU;2019:262, Doctoral thesis, 2019)Due to growth of the population in cities and limited space there is an increasing trend to move transportation systems, such as roads and railroads underground. Furthermore, Norway is a rugged country with deep fjords, ... -
Case study of crosshole GPR tomography for grouting distribution in rock fractures
Bazin, Sara; Kvistedal, Yme Asgeir; Anschütz, Helgard; Tunbridge, Lloyd; Jankowski, Pawel; Fannian, K.; Strømsvik, Helene; Grøv, Eivind (Chapter, 2018)The Nordic method for tunnelling consists of drill and blast, pre-grouting and rock support adapted to the geologic conditions. Extensive use of pre-grouting is normally applied to limit water leakage. The injection is ... -
Development of an algorithm to detect hydraulic jacking in high pressure rock mass grouting and introduction of the PF index
Strømsvik, Helene; Morud, John; Grøv, Eivind (Journal article; Peer reviewed, 2018)Pre-excavation rock mass grouting is a common procedure for reducing water ingress into tunnels during construction in Norwegian tunnelling. The level of grouting pressure is a disputed subject and the knowledge of how the ... -
Rørskjerm - Midlertidig sikring av stuff ved driving av tunnel gjennom soner med dårlig geologi
Strømsvik, Helene (Master thesis, 2015)Rørskjerm er en sikringsmetode som kan brukes ved tunneldriving under geologiske forhold som gir flommende og rennende masser, som kan skape utglidning på stuff. Disse forholdene kan oppstå ved driving i løsmasse, soner ... -
Testing the use of acoustic emission sensors to detect in-situ hydraulic jacking
Surdal, Christoffer Kolbeinsen (Master thesis, 2021)I denne oppgaven ble akustiske emisjonsensorer brukt til å overvåke et hydraulisk splitting forsøk for å se om AE kunne brukes til å oppdage hydraulisk jekking (HJ) in-situ. Deretter ble det forsøkt å se hvilken forskjeller ... -
Two New Methods for Defining Shut-In Pressure in Hydraulic Fracturing Tests
Trinh, Quoc Nghia; Hagen, Simon Alexander; Strømsvik, Helene; Larsen, Trond Erik; Grøv, Eivind (Peer reviewed; Journal article, 2023)Hydraulic fracturing is one of the most common methods to determine in-situ rock stress. The interpretation of the shut-in pressure to determine the minor principal stress is an important element of this method, and many ... -
Waterproof sprayed concrete with improved sustainability performance
Sjøbakk-Moe, Eivind; Holter, Karl Gunnar; Strømsvik, Helene (Chapter, 2023)Sprayed concrete in combination with rock bolts has successfully been used for permanent rock support in tunnels for decades. The main shortcoming is that sprayed concrete alone is unable to function as permanent waterproofing ...