本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 tvb now,tvbnow,bttvb# V( s4 E h5 v$ n" E
% D1 Y" w% ^8 n" ?" g9 u" ?tvb now,tvbnow,bttvbIf you are not a Physics person, read on and learn a fact of physics.
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Even after you see it, it is still hard to believe!公仔箱論壇& c1 Y" F. C# a5 f1 D3 P- K
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 5.39.217.77:8898 Y, y$ k) z- A5 B; ~
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
1 _! ~1 {) P0 T6 Q2 n. n: T7 y9 m9 aIt is located in the city of Magdeburg, near Berlin.tvb now,tvbnow,bttvb Z$ Z7 o9 k' y- c
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The photo was taken on the day of inauguration.
; l( ~1 d t9 {4 x$ h2 z: G$ ]5.39.217.77:8898To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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2 G" b/ H4 K3 c公仔箱論壇Question:
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5 Y4 K. U3 w VDid that bridge have to be designed to withstand the additional weight of ship and barge traffic,
7 N$ U8 ]2 j; ^- _* O$ `! hTVBNOW 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:公仔箱論壇5 a. y, w1 [1 p& t; V" G
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。) ^, h6 J/ R4 k0 `+ Z* T
It only needs to be designed to withstand the weight of the water! tvb now,tvbnow,bttvb3 m+ t: P& C+ z; o1 p3 D
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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. I! y t& }: x% btvb now,tvbnow,bttvbThe Incredible Magdeburg Water Bridge in Germany& [7 n) M9 K: W/ I& k2 N/ o
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.5 O" W2 L* B7 s- k! @$ c& D
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. 7 {0 f3 B* ]9 v3 |' k3 y/ S
2 r( ^ S+ X9 itvb 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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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。+ i; i* Q" l2 @6 S9 i# q; S4 F
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