本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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* k( _- B0 @5 m* Gtvb now,tvbnow,bttvbIf you are not a Physics person, read on and learn a fact of physics.
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5.39.217.76* F8 i- S1 @3 g( |+ f5 |
Even after you see it, it is still hard to believe!- `4 u4 U9 C/ [, g" R
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
: D) c' U' o5 B. X8 z6 n: L) [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。This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. $ @, u" }4 v2 y* {: F- [+ ~
It is located in the city of Magdeburg, near Berlin.
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# }+ f2 h1 F) g. Z; c! }公仔箱論壇The photo was taken on the day of inauguration.
5 Q% ^" F9 Q1 i# N0 N3 P& ETo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Question:5.39.217.764 m7 A3 A7 ?/ b6 p" F
9 I; t+ x* D( w b8 j! H; z7 \5.39.217.76Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
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It only needs to be designed to withstand the weight of the water!
D/ N( K9 ?7 z7 H( NWhy? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded公仔箱論壇9 R& d& g, ^# o& x8 h
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The Incredible Magdeburg Water Bridge in Germany& f" o: Z7 o- G- q* ^5 f8 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,bttvb/ ^$ u* Y, z4 j& t# G2 r% U
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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& ]5 _# |9 L4 N9 x4 Rtvb 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.
9 s% X% _/ E h4 Z5 }. \. s5.39.217.76TVBNOW 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。) |$ [5 A, A/ I
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