本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 tvb now,tvbnow,bttvb9 v7 b, e! _5 t% j* L7 F" n
8 ?! k3 `9 ^6 t0 N4 _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!0 R* S; r! f2 y, q
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! tvb now,tvbnow,bttvb& ~7 q6 P* S' D7 `) [ r- ]8 h
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
; x* m6 ]$ g4 v, _ j2 d5.39.217.76It is located in the city of Magdeburg, near Berlin.5.39.217.76. Q5 {9 j5 c3 r3 L0 z8 v6 R/ d
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。/ }+ m) V. |8 ]/ j1 K0 q3 d
The photo was taken on the day of inauguration.; i) ^$ d g5 I) R) I
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Question: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。, g2 N3 n! D# m! s' Y e2 o5 h
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,公仔箱論壇 ^/ ?* O% q" @/ W* k. `+ E2 S: y
Or just the weight of the water? 9 Q& G& |! J/ u( ^# c
- J _$ {5 T9 `tvb now,tvbnow,bttvbAnswer:
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It only needs to be designed to withstand the weight of the water!
3 p* @9 P$ Y' b; |& H- Atvb now,tvbnow,bttvbWhy? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loadedTVBNOW 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。: K0 t2 E2 |! v- F- D
" \, _' v5 @6 X G, y" I5 YTVBNOW 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 K- Q0 u* U. H5.39.217.76The Incredible Magdeburg Water Bridge in Germany
' l; i2 W( K+ N: f3 o* 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.
0 z& S8 _* a; W( C4 V/ k- }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 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. " k2 O% v' V/ }4 |
+ W8 ]" h. _& htvb 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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