本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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5 R+ l, ?& H, v0 xIf you are not a Physics person, read on and learn a fact of physics.
$ R& G( j4 z; k2 U& rAMAZING!
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Even after you see it, it is still hard to believe!9 }+ k1 R# t+ u1 p$ t
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
2 [8 r( p6 {3 [9 F% D- R6 D. MTVBNOW 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。This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. 公仔箱論壇; B) q2 B) ~4 ^# n2 ^, }& C
It is located in the city of Magdeburg, near Berlin.5.39.217.77:8898% M6 r! b5 \% [/ T$ G- J4 J
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The photo was taken on the day of inauguration.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。+ b8 h B3 Z9 }8 O9 s9 x4 T( a& I
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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* I9 t& X7 V& p: y- `# ?* aQuestion:
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0 U5 Y$ M A/ J" t5.39.217.77:8898Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
( R% z) C/ \ @" {5.39.217.77:8898Or 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!
5 P9 t! c6 A/ g' H- l. L( MWhy? 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
0 C E0 ?' }- h: @7 o& m( ?# Utvb now,tvbnow,bttvbThe 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.
8 f/ c3 f+ U: E P4 u$ s8 Q- e/ ?: b5.39.217.77:8898The 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. 公仔箱論壇0 o6 _) s. b, M3 r- I& D
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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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