本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 ( \. m1 i- s8 T: ~) [
4 G$ _% c$ r6 F z3 b公仔箱論壇If you are not a Physics person, read on and learn a fact of physics.
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Even after you see it, it is still hard to believe!公仔箱論壇0 h! `5 I5 k- {+ D# O
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3 D% T+ k K6 C* o: ?( iTVBNOW 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。Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 公仔箱論壇9 o6 G9 ?3 E& `1 p- {/ p
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. * J* N+ l& u5 t
It is located in the city of Magdeburg, near Berlin.
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1 m; u# d+ D% L" q: B7 h公仔箱論壇The photo was taken on the day of inauguration.
5 @/ M# B. I3 o* LTVBNOW 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。To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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2 U$ p3 l9 H. @0 @. }2 c3 i4 H! G5.39.217.77:8898Question:
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,$ g2 u( E8 T; e' R
Or just the weight of the water?
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It only needs to be designed to withstand the weight of the water!
, s( i0 z+ A( |! p3 R公仔箱論壇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
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% C$ p' M! m4 b l( y- i; e/ XThe Incredible Magdeburg Water Bridge in Germany
" e9 B% {0 \8 N' W! W, H' N5.39.217.77:8898The 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.
2 `0 E6 D1 u6 M6 X( TTVBNOW 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。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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4 F8 Q0 k' `/ N T* c5 U( j3 Z公仔箱論壇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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; S9 p: M8 F' s/ c( d- Y5.39.217.77:8898TVBNOW 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。( V/ |) D' u! T8 D/ X
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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。" \: {5 r0 ?: K" A" L+ _- \$ H0 Y j; l
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