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EVER SEEN A RIVER OVER A RIVER?

本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 tvb now,tvbnow,bttvb* O7 `, k- U+ W% m, p5 ^

9 ~% F& {# C: J/ S. I2 c- JTVBNOW 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。If you are not a Physics person, read on and learn a fact of physics.   
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% [1 ~0 q! O, ]公仔箱論壇Even after you see it, it is still hard to believe!

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5 x6 n, j$ n. T1 |+ y) yMagdeburg Water Bridge in Germany  
What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
0 L) ^9 u" |) V/ ~tvb 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. # U3 b8 ~1 H, V2 H5 V
It is located in the city of Magdeburg, near Berlin.

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, g, R* p- D% r+ YThe photo was taken on the day of inauguration.tvb now,tvbnow,bttvb7 z# H# D, G- c  n) z; o1 I
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.9 Y6 {) e9 c' W. k
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Question:

8 e0 c) S) x6 s, F2 h! o公仔箱論壇
6 t; ]+ z( c; p; V# B% ^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。Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,8 i9 f$ r2 Y3 ]1 ^) i- r/ `% D) _
Or just the weight of the water?
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( L1 x" x2 E3 M7 vAnswer:

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5 y5 O- o& Z3 v- q公仔箱論壇It only needs to be designed to withstand the weight of  the water! ' `% H) R; R# \! X5 s; @
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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The Incredible Magdeburg Water Bridge in Germany公仔箱論壇# z0 \4 `" D. b8 ?
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.
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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.
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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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平壤核子能源研究所
這宏偉壯觀、傲視寰宇的工程傑作早在 1919 年工程師們即已提出
, q6 r( O& N0 \公仔箱論壇連通兩條水道的最初構思,而羅騰湖 Rothensee 升船機及大橋錨碇2 Q* Q5 n2 Z$ R& B. A
也於 1938 年安裝就位,但在二次大戰期間,建設工程被推遲。公仔箱論壇1 J7 A& U6 y; A* L6 w  v/ l
隨後的冷戰時期,德國分裂,該專案被東德政府無限期地擱置下來。5.39.217.76: B. E0 o) q% \% i+ Q
德國重新統一後,隨著道路交通重大工程規劃的編制,水橋再次成為一個優先專案。5.39.217.763 P; q5 r6 i$ y# H1 a: f
於1997年開始建造,經過 6 年,耗資 5 億歐元,2.4 萬噸鋼材和 6.8 萬
9 L/ g  F$ t. W2 E公仔箱論壇立方公尺混凝土,完成了巨大的水橋,連接柏林的內陸港與萊茵河沿岸港口。 公仔箱論壇+ L8 z, t5 U4 i6 j6 D, q
2003 年正式通航,水橋全長 918 公尺。 而 2003 年之前,在米德蘭運河和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。' }7 j6 B8 a. C
易北河-哈威爾運河之間運行的船舶不得不繞道 12 公里通過。
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多谢您的分享!
first time heard & saw it, thanks for sharing, thanks tvboxnow!!
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