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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
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If you are not a Physics person, read on and learn a fact of physics.   
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5.39.217.76* y; u4 W0 V  Q( P4 G1 {: y

2 l% D9 c5 C5 r& j. U; ^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。Even after you see it, it is still hard to believe!
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4 K) L% z* z- p4 Q7 C# o" b+ e5.39.217.76Magdeburg Water Bridge in Germany  
What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 公仔箱論壇0 E1 e) j6 F8 f, ?6 a/ s
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,bttvb' S& R4 R+ A' {% e: j
It is located in the city of Magdeburg, near Berlin.

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* b/ T. K' T! o3 g# s; K公仔箱論壇The photo was taken on the day of inauguration.
6 R5 |" T; c5 E& m! D; F: |$ ?) L5 A5.39.217.76To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Question:

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: Q. @8 F1 M8 t, k! SDid that bridge have to be designed to withstand the additional weight of ship and barge traffic,
( ^8 D2 F! I" W4 h' H9 F5 @  `: c公仔箱論壇Or just the weight of the water? % }* b2 V; Q8 Y6 z/ P8 v; \+ n

) c6 `5 ]; V" t5 |  G* M" S* cAnswer:
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It only needs to be designed to withstand the weight of  the water!
( ^0 P6 v% i9 T: l1 A* Ctvb now,tvbnow,bttvbWhy? 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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5.39.217.76$ t; m: S* K9 U# g% J7 L
The Incredible Magdeburg Water Bridge in Germany公仔箱論壇5 Y: H- [8 H- t/ b/ U, N
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.公仔箱論壇( ^9 P, |3 b6 Y5 y6 Q/ S8 \
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 ], J8 ?, B5 S# U; C  R' s! |  `tvb now,tvbnow,bttvbConstruction 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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) T9 ?  r, N! S0 O& a4 etvb now,tvbnow,bttvb公仔箱論壇3 s! s# ]: k; ]% B- Q( _

" I1 \4 }4 q! ^/ V  q公仔箱論壇公仔箱論壇! ^, W$ h9 n5 y, V7 i/ {6 i

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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公仔箱論壇8 }. m7 t) |8 K7 l/ S
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# Y2 p9 t$ r. A  [/ H+ 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。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,bttvb% e' |/ Q& V1 f$ E- S) S4 x
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。tvb now,tvbnow,bttvb1 [% b+ x' r" M* D2 P/ 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。
. f8 @2 S9 E" l: _$ ~. F! Utvb now,tvbnow,bttvb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tvb now,tvbnow,bttvb. k  t" t8 v3 K" w2 P: ^  c
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。
' {) d; h: b0 v" m6 ?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
; s. A6 }# ~3 X' H) k1 O- ytvb 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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