本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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If you are not a Physics person, read on and learn a fact of physics.
- d' x( e, F2 }8 mAMAZING! . K' j8 q H% ^" D) C, E; p& I1 a
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Even after you see it, it is still hard to believe!
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 5.39.217.76, L' O% |! ?$ b
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
' n$ q0 O; D& I+ H2 @1 @" c5.39.217.76It is located in the city of Magdeburg, near Berlin.
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( {/ d) R" D1 ?5 O: ^1 L7 z* tThe 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。- x1 w' L4 ?( _* v! z' p
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Question:公仔箱論壇2 R2 N6 J6 F* F$ F) \
" q1 N* I4 |# Z) M% H2 atvb now,tvbnow,bttvbDid that bridge have to be designed to withstand the additional weight of ship and barge traffic,
( [0 J, n' G1 [% l; `8 }Or just the weight of the water? 4 ]5 t& B" v$ p3 h' t4 {* F' U& C9 i
. r9 i) E( A5 z8 o% h+ KAnswer:
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It only needs to be designed to withstand the weight of the water!
8 {8 V$ `( T: F6 Y* h* R+ ~5 TWhy? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded4 U y* @1 _- Z- K$ p1 n% ~, S& g
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' `+ ]- b! t% U: ^. B公仔箱論壇The Incredible Magdeburg Water Bridge in Germany公仔箱論壇# f1 L* k8 i* f3 }
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.4 a9 ]& `2 x" m
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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7 @ R/ S% P, s0 X: R; j* X) X' gConstruction 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. - k6 ^3 R# a0 e& m
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