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 ~* O, n% N( N: d( |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8 ?8 g) c# b4 S. @6 A
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. , V. ^1 D8 o. L+ a
It is located in the city of Magdeburg, near Berlin.tvb now,tvbnow,bttvb& r: }$ ^. m3 d; i2 g
" p- O/ F5 m8 S, @公仔箱論壇The photo was taken on the day of inauguration.5.39.217.763 t* ]" J* O/ v) C2 J5 j& k% ^
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.公仔箱論壇9 t7 T; Y4 S! z: e* e
' ~0 [2 a. t. zQuestion:- z! l) O) S" \: y. w8 R
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,% ?+ I* p& l9 g) l+ |
Or just the weight of the water? 8 C% m, Y# @! m+ A" A$ ]
6 K, P# e! l5 J, }! ]6 eTVBNOW 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。Answer:
3 C; q1 `; C) {/ P3 q; FTVBNOW 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。- k/ n7 y6 R# Z% S8 _
It only needs to be designed to withstand the weight of the water!
! k) t1 D7 v' ~% Y o, c; Y, TTVBNOW 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。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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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。: k2 G3 P& d, ]2 u* ?5 F, Q" l
The Incredible Magdeburg Water Bridge in Germany
5 v% W8 l9 F7 r; S/ o Q z5.39.217.76The 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.
* k! V6 v; G8 E0 R) U公仔箱論壇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. tvb now,tvbnow,bttvb) R; S7 A5 g1 v k) d; O/ S* h
4 @, A4 U- j8 f: U1 E+ E0 ]" 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。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. 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。* x" V# Z6 N, [, e. u" m# r6 U
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5 b7 X9 j# I5 O6 D7 F$ U& Z' `( TTVBNOW 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。+ |$ s2 ?# B& C9 }4 R) {
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