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標題: EVER SEEN A RIVER OVER A RIVER? [打印本頁]

作者: lilitan008    時間: 2011-10-2 10:09 PM     標題: EVER SEEN A RIVER OVER A RIVER?

本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 tvb now,tvbnow,bttvb7 O7 M0 h' ~( `7 i7 h9 J
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If you are not a Physics person, read on and learn a fact of physics.   
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& b# g$ ^8 l: QEven after you see it, it is still hard to believe!
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[attach]1486499[/attach]
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Magdeburg Water Bridge in Germany  
What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
7 B& g3 Q. u2 n6 V  \9 f& D# u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.
% p: ~( L) ?1 p- M9 @公仔箱論壇It is located in the city of Magdeburg, near Berlin.

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/ E" N3 |# t4 H# W. s9 Xtvb now,tvbnow,bttvbThe photo was taken on the day of inauguration.4 c- ~5 k0 X0 U% y9 ?0 Z+ X4 E
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。* v! U$ @; d- k8 A/ t) q" l

' D/ u' E" @* S1 R2 ?' t( ]tvb now,tvbnow,bttvbQuestion:
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; a( b! j# b! q& |  N+ W  |# E( E6 ]Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,公仔箱論壇  H7 a5 T. \( {# B# t+ g
Or just the weight of the water?
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Answer:
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+ m3 H+ }1 Z7 z+ U1 ?+ Rtvb now,tvbnow,bttvbIt only needs to be designed to withstand the weight of  the water! 5.39.217.77:8898" R7 s4 n, T! f
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
' ]/ s, R4 l- w  }) r. w( Y公仔箱論壇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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9 K# E: g( J4 s$ A1 B# s6 V6 V2 KTVBNOW 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。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.

4 c+ Y0 _* n5 o% l# CTVBNOW 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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作者: busyfun    時間: 2011-10-4 11:33 AM

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
5 z! V* V2 F1 _$ Y; `  A; ?( k8 Z連通兩條水道的最初構思,而羅騰湖 Rothensee 升船機及大橋錨碇
# K. _, q( s% j' U, T2 L$ A; U公仔箱論壇也於 1938 年安裝就位,但在二次大戰期間,建設工程被推遲。tvb now,tvbnow,bttvb4 B. B0 j4 Y6 L- A) ?
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,bttvb6 X$ Q6 K, @# v7 B9 A
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。1 v" j4 w+ J1 U6 P( ?2 i
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
. M: r. E$ |( rtvb now,tvbnow,bttvb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。
& r. P; O5 L2 p, u( Y7 g: ftvb now,tvbnow,bttvb2003 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 ^# _$ d2 d9 d
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。
作者: swyip21    時間: 2011-10-7 10:19 AM

多谢您的分享!
作者: Mimisan    時間: 2011-10-12 11:01 AM

first time heard & saw it, thanks for sharing, thanks tvboxnow!!
作者: pepperjellabies    時間: 2011-10-15 09:35 PM

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