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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 5.39.217.77:8898# w+ c, |" @$ \4 Y* }
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If you are not a Physics person, read on and learn a fact of physics.   
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: Q6 |0 h# h6 CEven after you see it, it is still hard to believe!
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[attach]1486499[/attach]5.39.217.77:8898; ^0 w/ a. o5 ]$ P# C6 g" y: [8 h
tvb now,tvbnow,bttvb6 L: e7 W1 e8 E: o% o( s
Magdeburg Water Bridge in Germany  
What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! tvb now,tvbnow,bttvb" |6 L8 |" {+ q- P, ^% o& H0 [' ^
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
$ j% b7 t: c9 p/ {) UTVBNOW 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。It is located in the city of Magdeburg, near Berlin.

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, s9 Z0 t. u5 _8 @6 i5.39.217.77:8898The photo was taken on the day of inauguration.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。4 \7 y, m% L# y; D
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。! K2 H3 k& _; o6 k$ N$ Y9 D1 j* M
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Question:

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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,5.39.217.77:8898, z1 B" C9 h+ m! f
Or just the weight of the water? 公仔箱論壇0 y% d  l1 R. L$ [
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。/ h) V: R; ?0 P' l# N
Answer:

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* z1 g; C1 |1 J4 T* |+ P9 H6 eIt only needs to be designed to withstand the weight of  the water! " B- l) Z- I- g( e: 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

' I2 g/ j% H1 u9 ]8 J5 b" LTVBNOW 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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5.39.217.77:8898+ a( f! U9 T9 ~% f  b
The Incredible Magdeburg Water Bridge in Germany5.39.217.77:88983 s# J, [9 `* f# U
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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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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[attach]1486501[/attach]" l7 a9 ?2 p" W* j  }
[attach]1486502[/attach]
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[attach]1486504[/attach]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。, _8 _( c9 S. r& v) O# Q
[attach]1486505[/attach]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。7 q5 Y2 A, Q" ~1 k3 f0 w

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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- n/ K" f) _* i: [
連通兩條水道的最初構思,而羅騰湖 Rothensee 升船機及大橋錨碇tvb now,tvbnow,bttvb. E9 M/ z7 \+ u  A6 M
也於 1938 年安裝就位,但在二次大戰期間,建設工程被推遲。5.39.217.77:8898, `5 u" z8 |% ?" l8 l
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。
3 C; [3 x, `" \) n: h' J5.39.217.77:8898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。
( B' }) A9 ?8 t. v1 _4 Jtvb 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. d! v" R3 P4 l0 A
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。
* N0 l& f$ D' R2003 年正式通航,水橋全長 918 公尺。 而 2003 年之前,在米德蘭運河和: J+ w) f8 L, R2 T1 X7 Q
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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