本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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- O. Y+ I3 k7 w1 f2 t" ^5.39.217.76If you are not a Physics person, read on and learn a fact of physics. tvb now,tvbnow,bttvb8 I, r' J+ \7 g" @
AMAZING!
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Even after you see it, it is still hard to believe!公仔箱論壇* L% ]1 |9 @1 d0 C; W
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
1 H- h5 t* W. R2 [+ ^4 T0 j4 v) [公仔箱論壇This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. ! R: R8 O; M+ q. ^ T
It is located in the city of Magdeburg, near Berlin.
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- j$ Z# P E+ ?7 T; q2 |The photo was taken on the day of inauguration.1 n* F- k t/ G1 h1 l
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.tvb now,tvbnow,bttvb/ N4 D7 Q9 `* ]5 O: B! d, \
( Y+ _5 d9 K1 Q' w+ j/ `: [Question:( V% C1 p* V3 g+ D
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。8 Z) {8 z- `, x6 v
Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
! G3 a3 R5 o. |, M7 ^Or just the weight of the water?
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It only needs to be designed to withstand the weight of the water!
9 u$ K3 x- l0 H* b4 x9 p u; v% ytvb 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 loaded2 ?% ^8 P+ v* r% c
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3 C* G) @7 V4 b& q% B5.39.217.76The Incredible Magdeburg Water Bridge in Germany
7 O0 u+ R3 q$ x$ |7 xThe 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.
3 [0 @' S. X. w% B. \) Y. r" f iThe 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. 5.39.217.76+ i8 {8 S! ^# {, ~
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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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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。$ c- a, |+ g$ G' E
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