Modern Wonders of the World
Architectural Wonders of
Wall of China
House of Pharos in Alexandria
of Angkor Wat
Warriors of Xian
world’s longest undersea
tunnel runs under the English Channel, between England and France. It
amazing engineering achievement. The tunnel sometimes called the
just over 50 kilometers long and runs for 38 kilometers under the sea
Seikan Tunnel in Japan is slightly longer, but runs under more land and
sea. The Channel Tunnel was opened in 1994 as part of an up-to
system linking Britain with the Continent.
For the last 200 years,
engineers have made many suggestions for a cross-Channel link. A tunnel
first proposed in 1802, and a Channel Tunnel Committee was formed as
as 1872. Some engineers have even considered building a bridge across
Channel. But it was not until 1985 that the British and French
asked companies to draw up serious plans for a tunnel. A year later
the best of the nine schemes they received.
The Channel is, in fact, three
tunnels - two rail tunnels and a smaller service tunnel. Digging began
English side in December 1987, and from the French side three months
Huge machines with revolving cutting heads took a month to dig each
Altogether the tunneling took three years.
The tunnels were bored at an
average depth of 45 meters beneath the sea bed. When the two halves of
service tunnel were just 100 meters apart, a small tunnel was dug by
connect them. Workers broke through art the end of 1990. The
the two rail tunnels took place on 22nd May and 28th
Seven months later all three
tunnels were connected, ready to be cleaned up and have railway tracks
the same time, engineers were working on the rail terminals at
England, and near Calais in France. The Channel Tunnel was opened by
Elizabeth II and President Mitterrand on 6th May 1994.
Cars, coaches and Lorries use the tunnel's
shuttle service like a moving motorway. They drive on to a carriage at
and off at the other after a 35 minute trip. Electric locomotives drive
shuttles at up to 160 kilometers an hour. Special high-speed trains
passenger’s non-stop between London, Paris and Brussels.