Sökning: "Tunnels"

Visar resultat 11 - 15 av 104 avhandlingar innehållade ordet Tunnels.

  1. 11. On the Characteristics of Fires in Tunnels

    Författare :Anders Lönnermark; Avdelningen för Brandteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; experiments; tunnel fire; heat release rate; temperature; fire spread; ventilation; backlayering; pulsations; thermoacoustic instability; equivalence ratio; emissions; gas concentrations; toxicity; Technological sciences; Teknik; Building construction; Byggnadsteknik; Road transport technology; Vägtransportteknik; Railway transport technology; Järnvägstransportteknik;

    Sammanfattning : Important phenomena related to tunnel fires are presented including both experimental and theoretical work. The main focus is on the large-scale fire tests performed in 2003, in the Runehamar tunnel in Norway. LÄS MER

  3. 12. Structural behaviour of shotcrete in hard rock tunnels

    Författare :Andreas Sjölander; Anders Ansell; Richard Malm; Fredrik Johansson; Eivind Grøv; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; shotcrete; structural behaviour; material models; rock support; bond strength; fibre-reinforcement; Concrete Structures; Betongbyggnad;

    Sammanfattning : Tunnels in hard and jointed rock are normally excavated in an arch shape to enable the rock mass to support its weight. Since the beginning of the 1980's, fibre reinforced shotcrete (FRS) in combination with rock bolts have been the dominating support method for hard rock tunnels. LÄS MER

  4. 13. The effect of changing stresses on the stability of underground openings : a study of the behavior of underground tunnels

    Författare :Peter Lundman; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mining and Rock Engineering; Gruv- och Berganläggningsteknik;

    Sammanfattning : .... LÄS MER

  5. 14. Studies of Two Aerodynamic Effects on High-Speed Trains : Crosswind Stability and Discomforting Car Body Vibrations Inside Tunnels

    Författare :Ben Diedrichs; Mats Berg; Chris Baker; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; train aerodynamics; external aerodynamics; tunnel aerodynamics; computational fluid dynamics; Vehicle engineering; Farkostteknik;

    Sammanfattning : .... LÄS MER

  7. 15. Flow facility design and experimental studies of wall-bounded turbulent shear-flows

    Författare :Björn Lindgren; KTH; []
    Nyckelord :fluid mechanics; wind.tunnels; asymmetric diffuser; turbulent boundary layer; flow structures;

    Sammanfattning : The presen present thesis spans a range of topics within thearea of turbulent flows, ranging from design of flow facilitiesto evaluation aluation of scaling laws and turbulence modelingdeling aspects through use of experimental data. A newwind-tunnel has been designed, constructed and evaluated at theDept. of Mechanics, KTH. LÄS MER