EVER SEEN A RIVER OVER A RIVER?
本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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( e$ X6 ]! T: w1 d( z2 }9 F: |tvb now,tvbnow,bttvbIf you are not a Physics person, read on and learn a fact of physics.
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! tvb now,tvbnow,bttvb# z1 j' v' Y% A* B0 U1 ^9 t
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. 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。( d, G' K6 d U$ w! z- A" W
It is located in the city of Magdeburg, near Berlin.
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To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Question:
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
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5 X9 v/ |/ M; ]8 r: XAnswer:; E- k1 T2 x/ I m- C2 j
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It only needs to be designed to withstand 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。* j" k* |9 b+ q- Q$ l/ y" F2 }
Why? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loadedwww2.tvboxnow.com+ M2 J( j( d' G( j4 y, U1 p- s% m
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: j3 G) M8 ^% @" D9 YThe Incredible Magdeburg Water Bridge in Germany
5 P4 x4 h8 H6 h) x; k) v; l/ IThe 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.tvb now,tvbnow,bttvb5 ^9 t. ]: }& Q9 O
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 }9 \9 p: U) j8 R6 b& X3 [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. www2.tvboxnow.com9 |% w$ C- K' p, Y$ e0 A0 B# |+ @
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