Wie wird der Druckunterschied ausgeglichen, den U-Bahnen erzeugen, wenn sie in unterirdischen Tunneln fahren?
Die Tunnel, in denen U-Bahnen (und in anderen Tunneln auch normale Züge) fahren, sind oft nur minimal größer als die U-Bahn-Waggons im Querschnitt selbst. Fährt eine U-Bahn im Tunnel zur nächsten Station, so schiebt sie doch eine große Menge an Luft vor sich her (Überdruck), während hinten am Ende des Zuges ein Unterdruck entsteht, oder? Gibt es irgendwelche Techniken oder Systeme, die diesen Druckunterschied ausgleichen?
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If you wait for an incoming subway, watch the air train. He’s increasing. This is sometimes even 30 seconds before you start. The subway therefore pushes the air ahead. However, this resistance is negligible at low speeds because the air has enough time to volatilize.
Of course, the question becomes interesting when a ICE enters a tunnel. Here, however, there is usually a greater distance from the ceiling.
in fact the draws push a certain air owl before themselves. this is also desired to ensure the air exchange in the tunnel.
the stations are already well ventilated by the on-going struts alone. the air inserted by the subway can escape wonderfully…
Lg, Anna
PS: at the berliner airport, the ubahnen are now running empty through the tunnels to ventilate the stations, so that there is no mold.
The Berlin am BER are not metros but S-Bahns
Okay, then it’s on the way… But a train in the tunnel is practically the same
There is practically no difference between subways and S-Bahns. Both in Berlin and Hamburg there are underground S-Bahn trains and above ground metros.
for this purpose, air shafts are upwards at certain intervals and thus
I don’t know any subways sealed with the tunnel. So it is not possible that the whole air is pushed in front of the web, while a vacuum is produced at the back.
Since air can be highly compressed, the air can be simply displaced and guided to the rear at the sides of the web or at the top.