本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 5.39.217.77:8898% s' J* y7 P( b$ G9 M! Z" f, [! x
+ i5 z( }+ g8 j& s9 K3 I# s9 d# H- k8 M! W公仔箱論壇If you are not a Physics person, read on and learn a fact of physics. tvb now,tvbnow,bttvb1 Z( X4 ^! f. Q8 @
AMAZING!
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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!
9 \4 l7 [: F$ o6 D) p! q" ^This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. tvb now,tvbnow,bttvb0 w0 o. ~4 s, n: U! B
It is located in the city of Magdeburg, near Berlin.5.39.217.77:8898. v( m% c9 v. ^/ ^: V8 g
) X/ T4 @/ A$ W7 H: ?8 s/ etvb now,tvbnow,bttvbThe photo was taken on the day of inauguration.) B' L* f8 l: W; \9 ?, G6 U7 F
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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8 r; L0 C! B6 _! t" yQuestion:公仔箱論壇, ?8 M1 V* {0 r& _1 H) q3 u1 m+ I
9 g# p6 U5 I8 ^/ }; q& N1 k8 O2 ?Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,5.39.217.77:8898* D0 t% d# ^4 D7 o3 K2 l
Or just the weight of the water? 公仔箱論壇+ \" V3 Q+ n+ M; d1 D
' k3 I1 s6 O7 P公仔箱論壇Answer:( I( h9 {1 l( h5 l' m$ a
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It only needs to be designed to withstand the weight of the water! 公仔箱論壇8 j8 V- u4 E5 I5 C0 p" L. r
Why? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded5.39.217.77:8898& }0 u0 G6 m. l) S" i& N
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4 D' Q5 _0 ]' j" I) ^# X, ]: o' SThe Incredible Magdeburg Water Bridge in Germany5.39.217.77:8898, y4 B4 ?: _4 Y
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5 R3 a B8 P% j, |: D
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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* }9 l3 Q2 s* B; A5 m& t4 ^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.
' I+ [1 b5 Y a6 V' [7 q7 A! 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。/ A! h- m* X, q9 u
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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。1 E' T8 n% w2 Q3 D
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