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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) Q0 o8 `: _" d/ h5.39.217.76Even after you see it, it is still hard to believe!5.39.217.76# i, d# T7 D* e# E( a
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
v, V" _2 ^0 _3 ?3 z9 P, btvb now,tvbnow,bttvbThis is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. tvb now,tvbnow,bttvb; Y) F8 }' r& Y' ]9 Y5 ]/ r* s9 \" d
It is located in the city of Magdeburg, near Berlin.公仔箱論壇 P$ H1 i0 O- d' p' i$ w
! |7 q3 z5 ? _8 P) \& zThe photo was taken on the day of inauguration.7 W7 J" n& O) r# C8 @1 Z8 D' b0 q
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,
5 E3 j3 t, p5 Z5 {! m/ l# U! t5.39.217.76Or just the weight of the water? 5.39.217.76' _+ |8 E0 p/ r6 t) ]: [0 p
4 Q/ ]! o9 V8 l/ ]* g1 ]7 L5.39.217.76Answer:
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It only needs to be designed to withstand the weight of the water! 5.39.217.76' f' V E4 D( ^: h
Why? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded5.39.217.769 u5 Y5 x: |' A7 I2 W, A
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& q [0 A* 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。The Incredible Magdeburg Water Bridge in Germany
1 ?3 p! W$ \: b4 c8 I2 m& AThe 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 m/ a; Y% C7 c
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& H# |% c1 @' r2 Y7 L
& M0 r' v4 r1 U& s3 Utvb 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.
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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。( g a2 f* z2 j
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. } m, V: C. W1 |/ h+ e8 s( ZTVBNOW 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 F: }# R9 W" r" L) s8 f7 D
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發表於 2011-10-2 10:09 PM
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發表於 2011-10-4 11:33 AM
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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。5 l8 V# a: M a5 [' N* Q
發表於 2011-10-15 09:35 PM
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