本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 0 `4 d2 `3 e' X! h
' w4 n; N. ^3 N% d8 q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!
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, ?, R0 j1 s0 l+ Y Utvb now,tvbnow,bttvbMagdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! tvb now,tvbnow,bttvb- c4 K \/ ]! r8 W' b
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,bttvb5 a* I" L, q4 l4 D# j3 ], V& A6 ?
It is located in the city of Magdeburg, near Berlin.
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The photo was taken on the day of inauguration.tvb now,tvbnow,bttvb/ h* w! p$ d) v% j+ g
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.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 Y3 ~3 m/ `9 N ]
, Y/ J* ^; f+ l. e! I3 y" ?Question:tvb now,tvbnow,bttvb% O! G1 x4 k7 ]) |- J
T( k$ Q# m! E- d公仔箱論壇Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,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。( F% |' ~' s7 |
Or just the weight of the water? tvb now,tvbnow,bttvb; k- J* X$ ^9 l* N1 @
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Answer:
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It only needs to be designed to withstand the weight of the water! " O. z9 y u+ w# h1 m
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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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。: ?; O3 J [. D7 w, f' c4 H
The Incredible Magdeburg Water Bridge in Germany
# I% p, X7 d$ |+ x5.39.217.76The 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.- O- h9 H& o* A, _
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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0 m/ m8 o7 E$ J! i8 T ~5.39.217.76Construction 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. ) g' G; o: b- Z/ m v: W9 U: n! [
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/ A% U0 ^ t: X2 ?2 R: t9 J& BTVBNOW 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。tvb now,tvbnow,bttvb. G2 q1 \* [5 M" _( o
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