Browsing Norwegian Geotechnical Institute (NGI) Digital Archive by Author "Olsson, Roger"

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    • Cements for tunnel grouting – Rheology and flow properties tested at different temperatures 

      Bohloli, Bahman; Skjølsvold, Ola; Justnes, Harald; Olsson, Roger; Grøv, Eivind; Aarset, Arnstein (Peer reviewed; Journal article, 2019)
      This paper presents work being carried out in Work Package 3 of TIGHT (True Improvement in Grouting High pressure Technology for tunnelling) project. The objective is to investigate flow and mechanical properties of three ...

    • Experimental triaxial testing of swelling gouge materials 

      Høien, Are Håvard; Nilsen, Bjørn; Vistnes, Gunnar; Olsson, Roger (Peer reviewed; Journal article, 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, ...

    • 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 ...