本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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/ d& k9 J6 k7 r$ Q2 ]公仔箱論壇If you are not a Physics person, read on and learn a fact of physics.
8 z' p5 s/ L" i' b公仔箱論壇AMAZING! ; O/ a2 [5 p, @( h' g
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Even after you see it, it is still hard to believe!
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, I3 x- e/ b/ K# `* GMagdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
/ s6 Z2 F( g6 Q2 i! ]8 Q5.39.217.76This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
# u3 g7 R& O/ Y- v: F/ ^; XIt is located in the city of Magdeburg, near Berlin.
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The photo was taken on the day of inauguration.
/ J y( D/ G4 w7 |8 ~6 a' mtvb now,tvbnow,bttvbTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Question:0 Q9 T. K1 W. T' v
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
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Answer:
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It only needs to be designed to withstand the weight of the water! ( K2 P9 k, `# z( s' O7 r/ R9 j
Why? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded5.39.217.769 _! A0 n- t1 B. R
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! f* M ]; b( K3 A; m% `, t/ }$ Ltvb now,tvbnow,bttvbThe Incredible Magdeburg Water Bridge in Germany公仔箱論壇& P7 b! Z3 l7 N! y
The Magdeburg Water Bridge is a navigable aqueduct in Germany that connects the Elbe-Havel Canal to the Mittelland Canal and allows ships to cross over the Elbe River. At 918 meters, it is the longest navigable aqueduct in the world.tvb now,tvbnow,bttvb) @- `- g' W. C+ j' J5 O8 ]
The Elbe-Havel and Mittelland canals had previously met near Magdeburg but on opposite sides of the Elbe Ships moving between the two had to make a 12-kilometer detour, descending from the Mittelland Canal through the Rothensee boat lift into the Elbe, then sailing downstream on the river, before entering the Elbe-Havel Canal through Niegripp lock. Low water levels in the Elbe often prevented fully laden canal barges from making this crossing, requiring time-consuming off-loading of cargo.
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Construction of the water link was started as early as in the 1930s but due to the World War 2 and subsequent division of Germany the work remained suspended till 1997. The aqueduct was finally completed and opened to the public in 2003. tvb now,tvbnow,bttvb: Z+ R' @# @! n; O( f `3 v9 o8 R
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發表於 2011-10-2 10:09 PM
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