本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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If you are not a Physics person, read on and learn a fact of physics.
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3 {' [- \8 C, G n6 J* H公仔箱論壇Even after you see it, it is still hard to believe!0 t$ t6 ^3 J4 C
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! " C7 W b, f a6 X7 h' T
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. 公仔箱論壇* ~) p/ Y3 {! I w' b$ @. ]
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# u0 V% ~+ H6 s4 w( i/ Q0 |$ j
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Question:tvb now,tvbnow,bttvb9 L( F ?7 ]4 X8 }
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,公仔箱論壇6 l0 D6 H8 m( ?* P: n5 M0 w! p4 U
Or just the weight of the water? 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。& D5 i9 s9 K k* A4 Y
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Answer:5.39.217.76/ \" a7 c. D2 J: f
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It only needs to be designed to withstand the weight of the water! 5.39.217.76( H6 Q( g8 B& b
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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The Incredible Magdeburg Water Bridge in Germany
5 p7 ]/ _6 C; ]& P0 P9 N& LThe 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.# J1 v1 {2 J4 d% l. N, i. u( X
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. 公仔箱論壇( Y. w$ M A6 N: F
9 q. O9 |1 f9 E: f& d( p- bConstruction 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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# s( f9 b* k0 E5.39.217.76TVBNOW 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 z0 F4 ?* \) N' j
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