本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 tvb now,tvbnow,bttvb: H/ f z% i. Y) U0 [
" |) Q8 H H; {7 `: M: AIf you are not a Physics person, read on and learn a fact of physics.
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Even after you see it, it is still hard to believe!8 |3 K) o1 U+ P" V
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 公仔箱論壇3 ]6 U, L6 i3 u, Q! O) Z- I$ h
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. - c! Y5 _, a1 D
It is located in the city of Magdeburg, near Berlin.tvb now,tvbnow,bttvb! I) a# m: j( m7 o, M) R5 K
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The photo was taken on the day of inauguration.
# ]9 x- J) O/ t. ^# P- z0 J+ X5 g公仔箱論壇To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。2 t* Q' x! ^# G# M+ C6 ~3 F
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Question:
! [( M# r5 o- g5 I: h+ |" H: wTVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。0 a E5 H Z& m$ ]# } l% M8 ~
Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,tvb now,tvbnow,bttvb, q0 g9 |+ [& Z# b/ `
Or just the weight of the water?
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Answer:
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It only needs to be designed to withstand the weight of the water!
/ v" J% Z5 d j4 Y# J+ a, i$ ]1 q: i5.39.217.77:8898Why? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded
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3 |) k2 M a- F, iThe Incredible Magdeburg Water Bridge in Germany) Q4 b8 @+ a2 m7 M: x+ L
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.5.39.217.77:8898# W( x& \* c) e+ }- h# W
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.
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5 Y" ~$ X% r: {) jTVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。
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