Inhaltsverzeichnis 16 11.4.3 Elektrotechnik .......................................................................................................513 11.4.4 Oberbau ...............................................................................................................514 11.5 Tunnelbauverfahren ............................................................................................514 11.5.1 Geschlossene Bauweise .......................................................................................514 11.5.2 Tunnel in offener Bauweise....................................................................................519 11.6 Brandschutz in Tunneln......................................................................................520 11.7 Abdichtung von Tunneln.....................................................................................527 12 Oberbau ...................................................................................... 529 12.1 Eisenbahnspezifisches Regelwerk ....................................................................529 12.2 Allgemeines.........................................................................................................538 12.3 Schienen .............................................................................................................540 12.3.1 Schienenformen....................................................................................................540 12.3.2 Schienenlängen ....................................................................................................541 12.3.3 Übergangsschienen ..............................................................................................543 12.4 Schwellen............................................................................................................543 12.4.1 Schwellenteilung ...................................................................................................543 12.4.2 Holzschwellen.......................................................................................................543 12.4.3 Spannbetonschwellen...........................................................................................544 12.4.4 Stahlschwellen......................................................................................................546 12.4.5 Brückenschwellen.................................................................................................548 12.5 Befestigungsmittel..............................................................................................548 12.6 Bettung................................................................................................................549 12.7 Weichen ..............................................................................................................551 12.7.1 Weichenschwellen ................................................................................................551 12.7.2 Weichenfahrbahn..................................................................................................552 12.8 Spurweite ............................................................................................................553 12.9 Schienenneigung ................................................................................................554 12.10 Feste Fahrbahn...................................................................................................554 12.10.1 Arten der Festen Fahrbahn ...................................................................................555 12.10.2 Oberbautechnische Anforderungen.......................................................................560
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