本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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& @# f4 L O$ { \; o) D7 h8 n5.39.217.76If you are not a Physics person, read on and learn a fact of physics. 公仔箱論壇5 L5 P h7 j* A% \* e8 a! A- G
AMAZING!
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Even after you see it, it is still hard to believe!
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: e3 \* P6 r$ Z+ a7 x4 n) n1 bTVBNOW 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。) A5 W! a" N% k% k
Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
6 K& \- ~( Z& G* N$ ^1 ^3 z5.39.217.76This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. & {+ G: W/ j! `1 `7 x! {
It is located in the city of Magdeburg, near Berlin.公仔箱論壇! T" o1 h) d& ^# s- z6 B* o& B' R
+ V2 |6 s) J3 H5 |7 S+ zThe photo was taken on the day of inauguration.公仔箱論壇! N6 i, \6 a! n, h5 z$ E
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.6 i( F X1 ], E3 L+ w, A
/ }" ^$ z1 o) T, O' G) DQuestion:. ~! k( @* X8 F, H
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,5.39.217.76' I2 R1 p% a/ a$ m6 G1 L
Or just the weight of the water? 0 G, d9 z/ Q9 G$ }! q; K" L
# C) u4 ]; U& i' O. d5 C公仔箱論壇Answer:
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It only needs to be designed to withstand the weight of the water!
: d9 C, o" Q, u' f2 x L( E+ A. ^Why? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loadedTVBNOW 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。$ u9 h4 I2 b. Y7 ^
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The Incredible Magdeburg Water Bridge in Germany公仔箱論壇9 H) I8 @4 N- \7 V. f
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.5.39.217.76' l; o- ~4 m6 h' J" B
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. 公仔箱論壇' ~3 ^% N7 L' M& X0 T
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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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