本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 tvb now,tvbnow,bttvb v: [8 E8 H2 _6 b9 n _0 w, _
5 \' M, x; W- M: @3 K( C W) V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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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
: Z6 y7 w# `, z1 y5.39.217.76This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
1 u) y+ H G% r+ c, u0 T( Y& h0 C公仔箱論壇It is located in the city of Magdeburg, near Berlin.
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3 b! x' l5 j5 u" y2 C. T/ p: ]5.39.217.76The photo was taken on the day of inauguration.+ F7 u# ?/ E& Z( I+ P
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.公仔箱論壇0 [5 n2 L- M2 x+ G: d
+ r/ _' ?# a* t6 y2 u5.39.217.76Question:
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
7 t2 g$ R( b' Y$ E% s. {% ^tvb now,tvbnow,bttvbOr just the weight of the water?
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Answer:tvb now,tvbnow,bttvb* z/ Q" k0 H6 r5 V& M5 U
+ Q. {; |6 ^5 M$ H3 w- y) M& I4 JIt only needs to be designed to withstand the weight of the water! tvb now,tvbnow,bttvb- `- z6 m, ]* n- X$ @* L3 O3 ~
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# C- d5 H1 z0 X2 g4 o
6 m5 I4 y" X, ~# a) s) q: J# gTVBNOW 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。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 w( [1 w) h! a3 e _3 r* b$ h# ?6 {
The Incredible Magdeburg Water Bridge in Germany
, {2 x: @/ m% a5.39.217.76The 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.
' {2 `$ k4 `: dThe 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. 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。# G N4 T# c: `* ?. u/ K
/ u, V$ C4 w1 h! k6 `7 `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.
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