本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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4 Q- d2 d! d8 N3 S/ w5.39.217.76If you are not a Physics person, read on and learn a fact of physics.
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) G# t6 Y- z' }7 y- H8 |. ctvb now,tvbnow,bttvbEven after you see it, it is still hard to believe!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。. R' }. O4 V: n+ J
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 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。: s# G4 n ~/ y
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
6 q+ p5 K0 b1 @" CIt is located in the city of Magdeburg, near Berlin.公仔箱論壇1 Q; n7 f* F1 w9 Z, p" W8 j3 y, y
3 \9 u; o, y+ @' r5 vThe photo was taken on the day of inauguration.tvb now,tvbnow,bttvb$ w$ O- s6 k E9 t
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.: O4 S) @& T! x6 z
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Question:
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,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。7 h& d8 Z B+ i9 D
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! 公仔箱論壇4 C( m1 _) Y( ]9 r" P4 ?
Why? 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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The Incredible Magdeburg Water Bridge in Germany公仔箱論壇/ j. p3 J+ X! c% e7 G) { t1 O
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.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。! m5 F0 T: A; }0 v; g) F
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. tvb now,tvbnow,bttvb* {2 x- x# @' }4 X* `) t. |
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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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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。: z9 b- l; T0 B" ~9 h
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