本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 公仔箱論壇: H* w6 r( T1 o9 T6 |0 R4 X
: V8 s9 P: P" OTVBNOW 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。If you are not a Physics person, read on and learn a fact of physics. # I( j) p5 C% ?% \; A* v
AMAZING!
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$ G. Z. K& Y7 X) I1 ?% O5.39.217.76Even after you see it, it is still hard to believe!tvb now,tvbnow,bttvb+ ]( X" J% P. g y0 O+ |! M
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$ }# S: e5 J9 ^1 {公仔箱論壇Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 5.39.217.76$ u c8 n& m9 C' `
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
7 H3 ?0 t8 `0 {* u2 \1 A' B' q5.39.217.76It is located in the city of Magdeburg, near Berlin.
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) E' y! f% Q `) P4 ATVBNOW 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 photo was taken on the day of inauguration.
5 H9 _) l! ?! G. C# \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。To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.5.39.217.763 d% G9 g Y W* ]4 N8 {# h8 T
8 V: U1 N, ]% s7 E2 jtvb now,tvbnow,bttvbQuestion:
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( S d I5 O6 w+ {# |: B0 W9 vDid that bridge have to be designed to withstand the additional weight of ship and barge traffic,) P; }3 O6 C# o+ A. e4 H, f, p: }& x
Or just the weight of the water? ! F' S% X, B6 f3 ^
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Answer:
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. J% ?% x g/ ?公仔箱論壇It only needs to be designed to withstand the weight of the water!
, ?. J$ C% _4 D6 J6 k* q6 i$ `9 }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 loaded5.39.217.76# x9 C6 ^6 `) B
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The Incredible Magdeburg Water Bridge in Germany
; B q% q0 R0 O公仔箱論壇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." d' B( d* Z3 e8 _( O% S
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. % l% o0 s! f' P7 o' c6 V
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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.
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