本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 tvb now,tvbnow,bttvb4 W C: ^% I2 _( d& ]5 p7 q7 t
6 D% I4 {( ?% Q$ lIf you are not a Physics person, read on and learn a fact of physics. 公仔箱論壇8 ~7 e3 _% v! X' y
AMAZING!
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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! 公仔箱論壇: p/ i, u9 U" h) ?
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; ]- Q8 z2 R- U" k# f, a
It is located in the city of Magdeburg, near Berlin.
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2 f' ?! R. c; L8 CTVBNOW 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.
" m" R* O+ H4 E9 K4 P( ^To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.公仔箱論壇2 _3 G5 Z: `: I {- U7 @: ]& O
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Question:9 W+ n. ]7 p0 w, B# T
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
( [% t2 i m7 F5 P* POr 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。2 V# r* [* x7 C1 U
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。* b6 i$ f8 M+ G# l9 A
Answer:
6 o( j" B5 W; i) K3 hTVBNOW 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。
8 _# G3 s5 [5 _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。It only needs to be designed to withstand the weight of the water!
# M# `1 j5 F% I1 r: |8 d3 R% M公仔箱論壇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公仔箱論壇# H% z5 w$ `+ I( C. Y% f9 V
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% d1 t9 Y. K6 y h' k, d0 ~The Incredible Magdeburg Water Bridge in Germanytvb now,tvbnow,bttvb6 `- I/ O1 e7 R1 K
The 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.
8 H! a+ A" v& |( r0 ^1 T1 ~+ n+ n+ r8 n5.39.217.76The 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. + X# C) }$ S' s ?! A, T" {. t
; @$ X" p' l- Y' vtvb now,tvbnow,bttvbConstruction 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. ( {1 g2 \ M7 u* Z4 A
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