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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 + d5 m# L8 X! C2 |- F/ j8 I, |* d
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If you are not a Physics person, read on and learn a fact of physics.   tvb now,tvbnow,bttvb& p& a6 y' t9 g& G
AMAZING!
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7 y" d( V- z4 j* n* Y) Z  T5.39.217.76Even after you see it, it is still hard to believe!

" u8 j- }! o: d. g/ k, q& r+ hTVBNOW 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。$ B. c: ^* Y9 a

! W* V0 H8 q8 {: b& b1 O# EMagdeburg Water Bridge in Germany  
What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
5 S# O% w  y/ H* Q$ o2 d0 z# Z# h) R公仔箱論壇This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
5 l4 B# k0 x# m& G  @- Q5.39.217.76It is located in the city of Magdeburg, near Berlin.
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& \: O+ K% {$ s公仔箱論壇The photo was taken on the day of inauguration.
+ s- t% J2 y8 X+ N6 G( |tvb now,tvbnow,bttvbTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
8 e  h) L, A$ h+ g. a/ i2 NTVBNOW 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。
2 X  P/ J1 A( k& D: J. N' @" c公仔箱論壇Question:
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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。) V$ G& h  ~0 N3 W- y+ t
Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,1 c& M$ e$ R. t3 q6 }8 E0 `1 E) L
Or just the weight of the water?
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) G- e5 C! \6 P& i" ctvb now,tvbnow,bttvbAnswer:
公仔箱論壇5 Q0 u% q- P, G' u& p0 C! `+ c

/ }7 r& @  O# I% G  T1 u% k4 rtvb now,tvbnow,bttvbIt only needs to be designed to withstand the weight of  the water! tvb now,tvbnow,bttvb% r6 k: o6 m. k7 e; \, u6 Z
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 Germany8 r$ A  U' S% e$ e3 _
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.8 r0 {: Z/ r8 X# y. g% x5 {
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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3 k) k1 l8 G8 h2 }$ m公仔箱論壇tvb now,tvbnow,bttvb" K1 W3 I' r) v8 a: c# F

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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
" q7 @6 @/ ?9 ^' I2 u2 N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
% W; G% f' h" Z; @, wTVBNOW 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。也於 1938 年安裝就位,但在二次大戰期間,建設工程被推遲。
6 p" d. |5 b. o  H0 a& O公仔箱論壇隨後的冷戰時期,德國分裂,該專案被東德政府無限期地擱置下來。
$ |5 L! h" }) E: c* E3 I: y5 D+ n# ]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。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。
/ F; k  m: V) P  l公仔箱論壇於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
! s6 Y) C& l% T* p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。
; n/ a7 `& p" ?: r! L2 {; W% r5 |公仔箱論壇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
# k$ j3 Y% A- _- W# M& K( 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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多谢您的分享!
first time heard & saw it, thanks for sharing, thanks tvboxnow!!
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