本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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) w5 C& {9 ~* W3 D. O1 n# hIf you are not a Physics person, read on and learn a fact of physics.
# \6 J1 Y2 _8 @* M公仔箱論壇AMAZING!
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8 k; g9 |8 K* Z8 }4 wtvb now,tvbnow,bttvbEven after you see it, it is still hard to believe!7 j! Q7 m9 M7 v& o& x$ Q
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3 \3 o/ G8 A* }, ]3 p公仔箱論壇Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
2 a K' W }7 f5 N8 x6 etvb now,tvbnow,bttvbThis is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. ; @, L" H4 d. [/ p( ~( @( C' a8 C" X
It is located in the city of Magdeburg, near Berlin.公仔箱論壇; N9 X2 m) h) Z0 O: H
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The photo was taken on the day of inauguration.
3 L9 o( x' q1 T, b4 C; z$ B# d( ZTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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0 u: y9 k' N, D- m. e8 gQuestion: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。5 S1 _; @4 G1 M+ C0 C: b& F8 k
G3 u* e+ j! g2 C ?公仔箱論壇Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,/ Y: q/ g) c8 W# q+ [0 u
Or just the weight of the water?
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Answer:* N$ D O+ c; E( b4 n
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It only needs to be designed to withstand the weight of the water!
4 `& D6 z2 U: ?" Ntvb now,tvbnow,bttvbWhy? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded: g! L6 p D+ t/ `, }
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+ I, O6 g, q; y6 \9 {5 @" KThe Incredible Magdeburg Water Bridge in GermanyTVBNOW 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。! d% k& f, a& P
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.公仔箱論壇6 u2 h+ e1 J0 A$ G4 A3 U
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. 公仔箱論壇5 p: x: O, v8 `1 e3 E: Q1 B5 p; J
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公仔箱論壇" \1 w" ~- C e" k- ~
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# o, H1 q. Q2 i& d3 ftvb now,tvbnow,bttvb5.39.217.760 T) S3 f# R7 }* T0 m4 B/ Z
/ X# Q$ c/ s& h( ITVBNOW 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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