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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 / J! w" B( N& q1 O; Z& B

5 v. F# t" o9 s& x. a7 m7 VTVBNOW 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.   
  Q, F3 \% V% x0 Ztvb now,tvbnow,bttvbAMAZING!

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9 A  J5 t6 g; h4 l- k* x. u) _公仔箱論壇Even after you see it, it is still hard to believe!
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。+ ?( d& [2 s/ g& U+ r5 Z5 e3 u0 N+ _
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Magdeburg Water Bridge in Germany  
What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
+ ^! ^# P- a7 j8 O% f, g8 _" c5.39.217.77:8898This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
8 r1 ~. g4 R; @2 d# gtvb now,tvbnow,bttvbIt is located in the city of Magdeburg, near Berlin.

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  W2 f* T6 k( ptvb now,tvbnow,bttvbThe photo was taken on the day of inauguration.
, X1 @" N2 K! L% g- e8 M5 yTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.5.39.217.77:88986 _5 {$ Z% N) ^, F8 _$ t

9 d' g7 P$ C& w( aTVBNOW 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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- v5 g+ A4 N( n7 }; jtvb now,tvbnow,bttvbDid that bridge have to be designed to withstand the additional weight of ship and barge traffic,tvb now,tvbnow,bttvb/ h4 h2 D( U" \, e. I& a
Or just the weight of the water?
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9 [$ ~; Q# N; ~, v9 {( \5.39.217.77:8898Answer:

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It only needs to be designed to withstand the weight of  the water! # h  H" Q; x/ l$ n3 U0 Q6 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

- u" [& W+ ^: N- S% f0 dTVBNOW 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。
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The Incredible Magdeburg Water Bridge in Germany5.39.217.77:8898  S8 g; l3 J1 S/ s' E" s" ]8 a
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.) C# ]5 i3 e0 @; {, v
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.
& y8 u+ V% {; J; mTVBNOW 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。- f& W7 p$ C! ^+ ^! t0 j
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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  ^: _4 ^: ~! O: B# \4 htvb now,tvbnow,bttvb5.39.217.77:8898( W' d# g1 g' {; S8 P
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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
* x- H7 f: b$ ~4 G7 @* z2 K+ j) Atvb now,tvbnow,bttvb連通兩條水道的最初構思,而羅騰湖 Rothensee 升船機及大橋錨碇
/ e- Q/ o5 U* ?- i" htvb now,tvbnow,bttvb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! K2 `7 a; j) m! \
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。
# D  B' q' d% _- v! G4 M  _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。3 W4 {. s  `. }7 G, S- \# ?3 C- z( K
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
0 R6 n/ u/ m6 d3 k% \0 t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 K, t2 V. t6 V  Y7 ~4 d2003 年正式通航,水橋全長 918 公尺。 而 2003 年之前,在米德蘭運河和公仔箱論壇3 l8 z3 {( Y8 h! s
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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