Wonders of the modern world Channel Tunnel Date started: December 1, 1987 Date finished: May 6, 1994 Location: Strait of Dover, between the United Kingdom and France The Channel Tunnel is a 50.5-kilometre undersea rail tunnel .At its lowest point, it is 75 metres deep. At 37.9 kilometres the Channel Tunnel possesses the longest undersea portion of any tunnel in the world, although the Seikan Tunnel in Japan is both longer overall at 53.85 kilometres and deeper at 240 metres below sea level. The tunnel carries high-speed Eurostar passenger trains, Eurotunne Shuttle roll-on/roll-off vehicle transport--the largest in the world--and international rail freight trains. The tunnel connects end-to-end with the LGV Nord and High Speed 1 high-speed railway lines. In 1996 the American Society of Civil Engineers identified the tunnel as one of the Seven Wonders of the Modern World
kasvades hoogustus 19 saj ka nende ehitamine FRA 40 ENG 60. Maailma suurim Rove tunnel Prantsusmaal 7118m b 22m h 15,4m 1922a. Raudteetunnelid 1826.a. avati esimene Prantsusmaal 1,5km b-3m h-5m. Terassildade buumiga samaaegselt 19 saj keskel hoogustus ka tunnelite ehitus. Arenes ka pinnaseuurimine, sest sellest sõltus trassivalik ja tehnoloogia ja valmimise kiirus. Kujunesid erinevad läbistusmeetodid vastavalt millist geoloogilist pinnast ja piirkonnda läbiti. Pikim raudteetunnel Seikan JAP 53,8km Alpi tunnel 1854.a Ida Alpides 1430m pikkune raudteetunnel. Esimene hiigeltunnel Mont Cenis 1857.a. 13,6km(alustati mõlemast otsast). Sveitsis Sankt Gotthardi 1880.a. 15km 8x7,5m (kasutati esmakordselt dünamiiti). Sveitsi ja Itaalia vahel Simploni tunnel 1906.a. 19,8km. Veealused tunnelid. Thamesi all 1807-40 (Kasutati emakordselt läbinduskilpi). Eurotunnel UK FRA 50,4km Autotunnelid Mont Blanc FRA-ITA 1958-62.a. 11,5km b7m h4,6m. Autotunnelite probleem on ventilatsioon ja
annaabi.ee 
