本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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If you are not a Physics person, read on and learn a fact of physics.
( `7 H* `" ^8 V" e0 m2 l公仔箱論壇AMAZING!
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8 {4 ~, U5 g+ x" ?Even after you see it, it is still hard to believe!9 E2 m6 a# q9 M. D5 B
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
: p$ P; t ~5 _* S1 _% atvb 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.
. Q) p9 Z1 R8 X% xwww2.tvboxnow.comIt is located in the city of Magdeburg, near Berlin.www2.tvboxnow.com; e) m: f/ x/ c) ~ O0 E$ a
! l6 q0 M {) O! I8 ?3 x( s* MThe photo was taken on the day of inauguration.tvb now,tvbnow,bttvb2 O0 W1 c4 e4 g. w, Q" r
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Question:www2.tvboxnow.com& E [- G+ y4 i; v( [5 F
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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 s/ x7 `, ^6 P
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! ; _) ~% X. Z& u! T# l z
Why? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loadedtvb now,tvbnow,bttvb5 J+ R }. T! p# K, i, ~
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/ ^/ ~+ H9 h, Q% W# DThe Incredible Magdeburg Water Bridge in Germany
0 k& {) z7 e. x( Owww2.tvboxnow.comThe 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.www2.tvboxnow.com1 C$ {) Z. I0 P% u' ?! 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.
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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3 ?% S8 E; Y% P) e
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