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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 0 `4 d2 `3 e' X! h

' w4 n; N. ^3 N% d8 q公仔箱論壇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!

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, ?, R0 j1 s0 l+ Y  Utvb now,tvbnow,bttvbMagdeburg Water Bridge in Germany  
What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! tvb now,tvbnow,bttvb- c4 K  \/ ]! r8 W' b
This 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,bttvb5 a* I" L, q4 l4 D# j3 ], V& A6 ?
It is located in the city of Magdeburg, near Berlin.

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The photo was taken on the day of inauguration.tvb now,tvbnow,bttvb/ h* w! p$ d) v% j+ g
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.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。. ~& {6 Y3 ~3 m/ `9 N  ]

, Y/ J* ^; f+ l. e! I3 y" ?Question:
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  T( k$ Q# m! E- d公仔箱論壇Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,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。( F% |' ~' s7 |
Or just the weight of the water? tvb now,tvbnow,bttvb; k- J* X$ ^9 l* N1 @
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Answer:

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It only needs to be designed to withstand the weight of  the water! " O. z9 y  u+ w# h1 m
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
# I% p, X7 d$ |+ x5.39.217.76The 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.- O- h9 H& o* A, _
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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0 m/ m8 o7 E$ J! i8 T  ~5.39.217.76Construction 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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/ A% U0 ^  t: X2 ?2 R: t9 J& BTVBNOW 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。tvb now,tvbnow,bttvb. G2 q1 \* [5 M" _( o
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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
' z. U. N  c% J, e* P" {* pTVBNOW 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。連通兩條水道的最初構思,而羅騰湖 Rothensee 升船機及大橋錨碇; g# y/ t7 W$ Z: f9 ]! D6 ^8 F; ]
也於 1938 年安裝就位,但在二次大戰期間,建設工程被推遲。tvb now,tvbnow,bttvb0 D3 u  U0 ?/ ?) E
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。
# ]+ f& w8 e3 I6 U5 g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。tvb now,tvbnow,bttvb; {3 c, J9 N' A! U
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
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4 q$ k: v# t& b1 N2 G; p% n! {$ d  G* K2003 年正式通航,水橋全長 918 公尺。 而 2003 年之前,在米德蘭運河和
$ m' m( _  K( G! j% q( u; u" A! X+ Etvb now,tvbnow,bttvb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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