Sökning: "crystalline rock"

Visar resultat 1 - 5 av 38 avhandlingar innehållade orden crystalline rock.

  1. 1. Studies of ionic diffusion in crystalline rock

    Detta är en avhandling från Stockholm : Kemiteknik

    Författare :Yvonne Ohlsson; KTH.; [2001]
    Nyckelord :matrix diffusion; surface diffusion; surface conductivity; nuclear waste; rock; mineral; electrical conductivity;

    Sammanfattning : .... LÄS MER

  2. 2. Drip Sealing Grouting of Tunnels in Crystalline Rock: Conceptualisation and Technical Strategies

    Detta är en avhandling från Stockholm : Kemiteknik

    Författare :Christian Butron; [2012]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; icicle formation; drip sealing; unsaturated flow; rock fracture; dripping.; channels; crystalline rock; design; Grouting; ice growth; evaluation;

    Sammanfattning : A conceptual model of the groundwater hydraulic conditions around the tunnel contour in ancient brittle crystalline rocks has been developed and verified. The general aim has been to reach an understanding of the groundwater conditions in and close to the tunnel roof where dripping takes place and to propose technical and practical strategies for waterproofing. LÄS MER

  3. 3. Numerical modeling of groundwater and air flow between compacted bentonite and fractured crystalline rock

    Detta är en avhandling från Stockholm : Department of Physical Geography, Stockholm Univeristy

    Författare :Benoît Dessirier; Stockholms universitet.; [2016]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; naturgeografi; Physical Geography; Two-phase flow; porous media; fractured media; compacted bentonite; crystalline rock; numerical modeling; geological disposal;

    Sammanfattning : The geological repository for final storage of spent nuclear fuel, envisioned by the Swedish Nuclear Fuel and Management Company (SKB), relies on several barriers: copper canisters deposited in holes in the floor of underground tunnels in deep bedrock, embedded in a buffer of compacted bentonite. The initially unsaturated buffer would take up water from the surrounding rock mass and swell to seal any potential gap. LÄS MER

  4. 4. Groundwater resources in hard rock coastal terrains Insights into heterogeneity and spatial variability

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Robert Earon; KTH.; [2019]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Crystalline Rock; Groundwater Balance; Kinematic porosity; Groundwater Recharge; Water Security; Coastal Aquifer; Mark- och vattenteknik; Land and Water Resources Engineering;

    Sammanfattning : Challenges regarding water security in hard rock coastal regions with limited soil cover are: a seasonal absence of recharge during times of peak residency, heterogeneity and variability of the fracture network, close proximity to saline water sources and spatially inconsistent storage and extraction. In areas where it is not feasible to connect residents to municipal water systems, a better understanding of the resilience of reservoirs is needed. LÄS MER

  5. 5. Hydromechanical Behaviour of Fractures Close to Tunnels in Crystalline Rock

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Johan Thörn; [2013]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Fracture stiffness; Fracture geometry; Laboratory experiments; Äspö HRL; Rock stress; In situ; Deformation measurement; Hallandsås; Hydromechanical coupling; Geological history;

    Sammanfattning : The deformation and stiffness properties of rock fractures are important measurable parameters when describing their hydromechanical behaviour. Deformation refers to aperture change. Stiffness refers to the amount of deformation per stress change to which a fracture is subjected. LÄS MER