本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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6 [4 V1 O' x% C! `- J0 ^/ dIf you are not a Physics person, read on and learn a fact of physics. & k; t# T! u3 U1 D( |0 u; U" @
AMAZING!
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Even after you see it, it is still hard to believe!tvb now,tvbnow,bttvb5 [0 z X$ i* f: V: r" y. Y
% Y$ Q8 i# A: ]& M4 {7 f7 j, ^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。
9 V, {, n) D5 z: AMagdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! tvb now,tvbnow,bttvb1 i- d8 q- F: k/ f
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: ]+ o# H- A0 b& B
It is located in the city of Magdeburg, near Berlin.! `! z, L1 S8 S7 O& c4 C
3 h6 G6 r5 O. E4 kTVBNOW 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.
7 k8 C9 R6 a+ p7 Gtvb now,tvbnow,bttvbTo 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,tvb now,tvbnow,bttvb" q) ` Q9 C( e
Or just the weight of the water? 公仔箱論壇) o6 N9 ]% j+ N% i9 j+ P( ]; {
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。9 M ^# [$ u4 A/ o n, R- b& ^# {/ [
Answer:
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4 K% j& i, d9 b8 a; U2 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。It only needs to be designed to withstand the weight of the water! 公仔箱論壇2 ^5 T; R0 ]& I" L
Why? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loadedtvb now,tvbnow,bttvb: }9 |/ r: `7 i9 r* T5 h/ ^ ?, w
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The Incredible Magdeburg Water Bridge in Germany
0 q& \% d3 s: J$ s; c$ r' l5.39.217.76The 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.5.39.217.76; m: z6 W1 D3 w5 o: [ 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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4 _4 [. e7 \- zConstruction 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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