The provided air expenses in tunnel are determined with the aerodynamic calculation of train motion pistol effect and after movement effect. It is ascertained, that for the tunnel conditions air expenses that are processed with pistol effect are approximately 2/3 removed towards train motion and 1/3 ﬂows орposite to the free space between train and tunnel strengthening. The last one provokes air turbulence and represents common aerodynamic resistance stand face. Despite this, all galleries of Marabda-Akhalqalaqi train main lines can be aerated on expense of train pistol effect with aroused natural pressure. The use of his pressure could be more effective if every chamber and niche will be equipped with ventilation cavity on the both sides of tunnel. The every cavity section area should be 5.6 m2. The noted measures will shorten aerodynamic resistance a rouse by air ﬂowing in distances and would be more outhunted by calculation of railroad tunnels line of Marabda—Akhalqalaqi.
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O. Lanchava, N. Ilias, I. Andras, R. Moraru, I. Neag. On the Ventilation of Transport Tunnels in the Presence of a Strong (Heavy) Fire. ANNALS OF THE UNIVERSITY OF PETROSANI, Romania, 2007, 12p. http://upet.ro/anale/ing%20mec/2007%20rezum.html.
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