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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 ) T* v2 M% k) E, T& |. m
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If you are not a Physics person, read on and learn a fact of physics.   公仔箱論壇& F' T2 o3 U# l) V# k$ ~8 [
AMAZING!
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Even after you see it, it is still hard to believe!

5 P6 d) z, ?8 J9 Q) C! H  R- b5.39.217.76: @' v/ C5 F# W6 B( }* ~; m2 D5 F

" C2 l' d5 ~+ g+ XTVBNOW 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。Magdeburg Water Bridge in Germany  
What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! $ b6 n& w1 j, D# C% i
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$ t" C$ h7 D% j8 T
It is located in the city of Magdeburg, near Berlin.
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The photo was taken on the day of inauguration.
3 N/ f2 J7 R. K3 I5.39.217.76To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists./ {) e7 N- }" [* B6 J4 _# \' j

( t2 p: \$ r8 m( p  Y" r  m9 k1 X* qTVBNOW 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。Question:
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,tvb now,tvbnow,bttvb1 X1 c( X  @! {& X1 ]4 [% X
Or just the weight of the water?
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Answer:

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% c6 f! H9 R" }7 I) o: ?: CIt only needs to be designed to withstand the weight of  the water! 公仔箱論壇" U6 j3 C' \, A: ?  v
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( N) h4 J5 s2 G4 u2 }) X
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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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。  I  h$ y3 |$ p
tvb now,tvbnow,bttvb; x# w# d# V* P4 S2 E" Y* k* q

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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tvb now,tvbnow,bttvb# e' q/ R/ G$ g& \
連通兩條水道的最初構思,而羅騰湖 Rothensee 升船機及大橋錨碇
- f" S' D8 x  X* B. z$ k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" B; m+ M0 E/ t" {/ e/ D5 I& C
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。2 g5 K2 {- D. _* y& g* C' D
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。
2 D. A  R9 S/ z: b5.39.217.76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 F0 z9 Z. G, L5 [5.39.217.76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。 5.39.217.76$ n# u2 M  \) V- R5 G) M1 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
% ^, i+ O2 R4 Q3 I8 U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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  • k23bb

多谢您的分享!
first time heard & saw it, thanks for sharing, thanks tvboxnow!!
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