EVER SEEN A RIVER OVER A RIVER?
本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 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。6 P& K/ S$ G1 {+ I1 u
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If you are not a Physics person, read on and learn a fact of physics.
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* N9 k" ^8 }: W6 Mtvb now,tvbnow,bttvbEven 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 n! i( c6 k. M! `8 z4 _7 _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. 5.39.217.775 U) V ]9 _( Y2 @% X2 ^( m
It is located in the city of Magdeburg, near Berlin.5.39.217.77! A) }* ?6 ~ H$ b) j; c
6 u* T) t% [ q* r K [2 \5.39.217.77The photo was taken on the day of inauguration.. Q) c2 Z+ g, K/ o% o& {
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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8 I4 m* }, @% X3 e) H公仔箱論壇Question:
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,5.39.217.77 Z) p4 E J0 q2 e
Or just the weight of the water? - n' t9 F% B: o8 [5 T& e* j9 Q& {
# ?: M" S* B- D& _" u7 SAnswer:
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It only needs to be designed to withstand the weight of the water! 5.39.217.772 j0 A. b7 ?3 G/ k# H# Z) k0 F
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。+ Q4 P t& z6 ?9 k
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The Incredible Magdeburg Water Bridge in GermanyTVBNOW 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。& j4 P8 E& f0 j+ Y/ w% h8 L! _3 N
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.公仔箱論壇4 z/ P& A- K7 Z! G- {4 K9 D7 Q
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. 公仔箱論壇# Q8 s6 i" }, w% W6 e% @5 T
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