Full scale fire experiments in a tunnel

Esko Mikkola, Olavi Keski-Rahkonen, Christer Holmlund, Pentti Loikkanen, Hanne Ludvigsen

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review


    Two pilot fire experiments were carried out in a tunnel 140 m long, 6 m wide and 5 m high. The tunnel had unprotected surfaces of natural calcite rock. The first experiment was designed to simulate fire in a subway car. The second experiment simulated fire in a queue of cars. Forced ventilation of 7 cu m/s was used. Fire load was made of wood cribs. In the first experiment the distributed fire load burned with a constant velocity of 0.7 mm/s without flashover. In the second experiment two piles of 500 kg wood burning with a power of 8 mw did not ignite a third pile 1.6 m apart. The spalling of rock off the ceiling and walls was very strong.
    Original languageEnglish
    Title of host publicationLarge rock caverns
    Subtitle of host publicationproceedings of the International Symposium
    EditorsK.H.O. Saari
    Place of PublicationOxford
    PublisherPergamon Press
    ISBN (Print)0-08-034078-4
    Publication statusPublished - 1987
    MoE publication typeA4 Article in a conference publication
    EventLarge Rock Caverns (LRC) 1986 - Helsinki, Finland
    Duration: 25 Aug 198628 Aug 1986


    ConferenceLarge Rock Caverns (LRC) 1986


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