本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 * P O, O- E6 s9 H( `, x5 W5 p/ q& b
* c7 D1 |+ r2 e; j公仔箱論壇If you are not a Physics person, read on and learn a fact of physics. 公仔箱論壇& _: L" q% o- }& m
AMAZING!
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Even after you see it, it is still hard to believe!7 ]; b& Z) h# q& u
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
: K1 r& i& a3 I- a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. tvb now,tvbnow,bttvb: h, E6 {% ~8 V/ q t
It is located in the city of Magdeburg, near Berlin.) |5 |& q$ z8 Q% H; B0 S. w# Z! ^
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The photo was taken on the day of inauguration.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 `1 O3 P1 S; ~
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Question:5.39.217.76- b* A1 b9 v. {& N9 c3 F# m
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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。3 C6 a! R+ z8 I) z3 C
Or just the weight of the water?
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* V: H9 Q) W+ ]% @) Y# m2 QAnswer:8 b, \1 k/ ]4 ]5 k$ u% F0 i2 g9 ~
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It only needs to be designed to withstand the weight of the water!
, C" s: u; w' G2 k8 c6 ]; @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
' g# q+ q: f4 r4 ?* xTVBNOW 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。
6 k9 A1 H% h& m4 J/ jTVBNOW 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。- j( g9 H% k+ U3 E; w( D0 w
The Incredible Magdeburg Water Bridge in Germany公仔箱論壇( O% Z; @ j3 T( i
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.tvb now,tvbnow,bttvb5 l7 {- T. ]5 W' m. O; R' }: n' C& t( T1 Y
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.
5 F9 V" Y" C% k7 B$ w) j- b; h2 pTVBNOW 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* |4 m7 Z5 H) ^
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