本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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4 e! X& c8 z/ M; w* E5.39.217.77:8898If you are not a Physics person, read on and learn a fact of physics.
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公仔箱論壇" ]8 E! n- T! o" e3 u
Even after you see it, it is still hard to believe!
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! tvb now,tvbnow,bttvb/ O4 J* h5 y# N+ W3 d, I* p
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
4 P/ H% v h4 @5 K q0 [; R, z公仔箱論壇It is located in the city of Magdeburg, near Berlin.tvb now,tvbnow,bttvb9 j. m, Y# p7 \% Z
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。: W- e8 c$ D7 \0 O0 i
The photo was taken on the day of inauguration.
8 a5 m% a$ H8 _5 e0 a1 O2 w5.39.217.77:8898To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
3 o6 H8 }. X, z* c) P1 v, 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。公仔箱論壇* {. x# G( i$ {0 `. T) [6 e
Question:公仔箱論壇' n! O+ u( F# {
% k! @6 k7 J9 `. S/ R2 }/ tTVBNOW 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。Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,tvb now,tvbnow,bttvb1 P1 V5 L0 E9 ^6 l+ o9 f( {
Or just the weight of the water?
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Answer:+ y4 W6 e" p8 t! E9 w7 p" ~0 e
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It only needs to be designed to withstand the weight of the water! 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。; c9 p. H8 N; Q8 ]1 C
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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) c6 \1 i* e5 Y5 D# D9 eThe Incredible Magdeburg Water Bridge in Germany公仔箱論壇) b) t8 W) A, b- i1 v
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.0 G# x$ Z4 Q+ L4 Z* V1 Q
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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( i1 [/ D' h. Z5 E: F, G& c9 b3 ttvb now,tvbnow,bttvbConstruction 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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/ L7 V; M7 I# I1 J2 dTVBNOW 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。! H( D" U" d N9 H: L7 f
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