本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 tvb now,tvbnow,bttvb1 j* X" |- U5 J5 _
3 J3 n3 d1 y/ o" m! V7 w$ n5.39.217.77:8898If you are not a Physics person, read on and learn a fact of physics.
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' l3 t" ^7 G6 V* ]2 stvb now,tvbnow,bttvbEven after you see it, it is still hard to believe!9 P! u2 F( }. m% t0 f6 I" a
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; r) D- m# [& o# A9 Rtvb now,tvbnow,bttvbMagdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 公仔箱論壇; Q. F- h P) ^! _2 {0 V% T
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. % m; @2 X: l& ~# \+ |, K6 f$ {
It is located in the city of Magdeburg, near Berlin.
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The photo was taken on the day of inauguration.
" N/ o% `) |( c3 J8 n8 n1 q公仔箱論壇To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Question:
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; E& h ?3 c8 [5.39.217.77:8898Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
/ d* m* u3 W" s% ?9 qTVBNOW 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。Or just the weight of the water?
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Answer:
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: ^* A i9 G0 r/ |! a: X% fTVBNOW 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。It only needs to be designed to withstand the weight of the water!
* U5 @9 @3 T) }$ Y" G8 E$ O; F- v3 zWhy? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded5.39.217.77:88983 |7 L+ g; ?' H$ }0 r
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8 Q* Y$ b& m( J1 z) A+ _7 W" HThe Incredible Magdeburg Water Bridge in Germany
5 S8 O: J) Q9 @, J- A" N# kTVBNOW 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。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.
- |3 D ^5 x `" u5.39.217.77:8898The 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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