Difference between revisions of "Aizhai Bridge"

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矮寨大桥两端接线的隧道,给桥梁工程师们提供了足够的场地条件,使他们能够在山顶上建设主塔,这样就能将其中一侧的主塔的高度减少到仅仅只有50米-这对一座跨径几乎与1176m跨的金门大桥相当的悬索桥而言,主塔高度可谓是相当之矮。除了建设成本上的节约之外,粗壮的支承体系允许桥梁结构能够有更多的挠曲空间。较高一侧的主塔也依然独特,边跨的钢主缆索远远的飞跃到隧道口后方的锚固到高山侧崖上,这些都令甫至胜境的游客不禁的好奇坐落前方的究竟为何。结构大部分都在崇山峻岭之间隐藏着,不论你从峡谷哪一侧的隧道驶出,大桥的出现绝对足以让人惊讶的下巴掉下来。由于在大桥最后的桁架节段吊杆与主塔塔顶间约有100米的间隔,工程师们便增加了一定数量的地锚拉杆,以稳定两根庞大的悬索钢缆并可以尽量降低会造成大桥其他构件破坏的振动。建设一个瞭望观光平台和旅游中心更将能提供欣赏大峡谷的宽广视角
 
矮寨大桥两端接线的隧道,给桥梁工程师们提供了足够的场地条件,使他们能够在山顶上建设主塔,这样就能将其中一侧的主塔的高度减少到仅仅只有50米-这对一座跨径几乎与1176m跨的金门大桥相当的悬索桥而言,主塔高度可谓是相当之矮。除了建设成本上的节约之外,粗壮的支承体系允许桥梁结构能够有更多的挠曲空间。较高一侧的主塔也依然独特,边跨的钢主缆索远远的飞跃到隧道口后方的锚固到高山侧崖上,这些都令甫至胜境的游客不禁的好奇坐落前方的究竟为何。结构大部分都在崇山峻岭之间隐藏着,不论你从峡谷哪一侧的隧道驶出,大桥的出现绝对足以让人惊讶的下巴掉下来。由于在大桥最后的桁架节段吊杆与主塔塔顶间约有100米的间隔,工程师们便增加了一定数量的地锚拉杆,以稳定两根庞大的悬索钢缆并可以尽量降低会造成大桥其他构件破坏的振动。建设一个瞭望观光平台和旅游中心更将能提供欣赏大峡谷的宽广视角
  
 
[[File:AizhaiCanyonView.jpg|750px|center]]
 
A view of how the Aizhai Bridge will look when the deck is completed in late 2011.
 
 
 
[[File:AizhaiAvatarCanyon.jpg|750px|center]]
 
Looking like a scene from the movie Avatar, the deep canyon dwarfs one of the towers in the upper left.
 
 
 
[[File:AizhaiAnchorage.jpg|750px|center]]
 
One of the cable anchorages located on the back side of the mountain range.
 
 
 
[[File:AizhaiAnchorage2.jpg|750px|center]]
 
Note how close the foliage is to the back span cables.
 
 
 
[[File:AizhaiAwesome.jpg|500px|center]]
 
 
 
[[File:AizhaiCables.jpg|750px|center]]
 
The catwalks were in place by mid-2010.
 
 
 
[[File:AizhaiCables4.jpg|750px|center]]
 
Image by Rednet.cn
 
 
 
[[File:AizhaiCables5.jpg|750px|center]]
 
 
 
[[File:AizhaiCableSpinning.jpg|750px|center]]
 
 
 
[[File:AizhaiCableSpinning2.jpg|750px|center]]
 
 
 
[[File:AizhaiCableSpinning3.jpg|750px|center]]
 
 
 
[[File:AizhaiCablesComplete.jpg|450px|center]]
 
The main cables were completed in the fall of 2010.
 
 
 
[[File:AizhaiCablesComplete2.jpg|750px|center]]
 
 
 
[[File:AizhaiCablesComplete3.jpg|750px|center]]
 
 
 
[[File:AizhaiCablesComplete4.jpg|750px|center]]
 
 
 
[[File:AizhaiCablesComplete5.jpg|750px|center]]
 
 
 
[[File:AizhaiRenderinfg.jpg|750px|center]]
 
Aizhai computer rendering.  In the final design, the taller tower was built with a horizontal cross brace.
 
 
 
[[File:AizhaiRoad.jpg|750px|center]]
 
 
 
[[File:AizhaiWindTests.jpg|750px|center]]
 
Aizhai valley wind test model.
 
 
 
[[File:AizhaiConstProcess.jpg|750px|center]]
 
A large model was created to show the unique process where the truss sections will be pulled and rolled along hanging cables with wheel bogies attached to them.
 
 
 
[[File:AizhaiModelTruss.jpg|750px|center]]
 
 
 
[[File:AizhaiConstProcess2.jpg|750px|center]]
 
One of the massive bogies especially designed to pull the suspended truss sections out over the gorge.
 
 
 
[[File:AizhaiBogie图为矮寨特大悬索桥试验现场.jpg|750px|center]]
 
A test section was set up for the traveling bogies.  The temporary supports simulate the stringer intervals where the bogies will travel on cables that are connected to the ends of the stringers.
 
 
 
[[File:AizhaiBogie.jpg|750px|center]]
 
 
 
[[File:AizhaiBogie2.jpg|550px|center]]
 
 
 
[[File:AizhaiTunnels.jpg|750px|center]]
 
The tunnel entrances beneath the tall tower.
 
 
 
[[File:AizhaiCableView2.JPG|750px|center]]
 
One of the cables sagged down into the gorge during the early process of setting up the catwalks.  The Chinese workers quickly freed up the cable and hoisted it out of the valley.
 
 
You can view a video here of the preparation to use a small blimp to take the first pilot line across.
 
http://bbs.rednet.cn/thread-22618784-1-1.html
 
 
 
[[File:AizhaiCableView.JPG|750px|center]]
 
 
 
[[File:AizhaiCableView4.JPG|750px|center]]
 
 
 
[[File:AizhaiCableView6.JPG|450px|center]]
 
The hanging cable reveals just how high up the scaffolding is below one of the towers.
 
 
 
[[File:AizhaiCableView7.JPG|750px|center]]
 
 
 
[[File:AizhaiCableView8.JPG|750px|center]]
 
 
 
[[File:AizhaiCable8.jpg|750px|center]]
 
 
 
[[File:AizhaiConstView3.JPG|750px|center]]
 
 
 
[[File:AizhaiNight.jpg|750px|center]]
 
 
 
[[File:AizhaiNight2.jpg|750px|center]]
 
 
 
[[File:AizhaiNight3.jpg|450px|center]]
 
 
 
[[File:AizhaiRendering.jpg|750px|center]]
 
The most recent rendering showing the final design with pointed ornamentation on the tower tops.
 
 
 
[[File:AizhaiBridgeDrawing.jpg|750px|center]]
 
 
 
[[File:AizhaiBridgeImage3.jpg|750px|center]]
 
 
 
[[File:AizhaiBridgeImage2.jpg|750px|center]]
 
 
 
[[File:AizhaiBridgeImage.jpg|750px|center]]
 
 
 
[[File:AizhaiDrawing.jpg|750px|center]]
 
An earlier drawing showing a blue pin stripe paint scheme.
 
 
 
[[File:AizhaiBridgeView.jpg|750px|center]]
 
The view from the side with the short tower shows the taller tower halfway complete on the far side of the canyon.  Image by www.smxxsy.com
 
 
 
[[File:AizhaiShortTower2.jpg|750px|center]]
 
 
 
[[File:AizhaiShortTower.jpg|750px|center]]
 
 
 
[[File:AizhaiFoundations.jpg|750px|center]]
 
 
 
[[File:AizhaiTowerDesigns.jpg|750px|center]]
 
Several Aizhai bridge tower designs.
 
 
 
[[File:AizhaiAreaMap.jpg|750px|center]]
 
Map of the new highway northwest of Jishou.
 
 
 
[[File:AizhaiPropMap.jpg|750px|center]]
 
A map showing the various Aizhai bridge routes and proposals that were studied. 
 
 
 
[[File:AizhaiProp1.jpg|750px|center]]
 
Aizhai bridge proposal 1 would have required an unusually long main span of 1,300 meters and a lengthy side span but both towers would have been short.
 
 
 
[[File:AizhaiPropC.jpg|750px|center]]
 
Proposal C would have had a main span of just 1,100 meters and is similar to the final design.
 
 
 
[[File:AizhaiPropM.jpg|750px|center]]
 
Proposal M would have had a main span of 1,228 meters but required a tower almost 200 meters high as well as an anchorage resting on a steep mountain slope. 
 
 
 
[[File:AizhaiPropQ.jpg|750px|center]]
 
Proposal Q is very similar to the final design but with a slightly shorter main span of 1,128 meters.
 
 
 
<div style="text-align: center; font-size: 25px;">
 
[[File:AizhaiRoyalGorge.jpg|750px|center]]<br />
 
Aizhai and Royal Gorge bridge size comparison<br />
 
</div>
 
  
  

Revision as of 19:06, 16 October 2011

Aizhai Bridge
矮寨特大桥
Jishou, Hunan, China
1,083 feet high / 330 meters high
3,858 foot span / 1,176 meter span
2012

AizhaiCropped.jpg


When it opens in 2012, Aizhai will be the world’s highest tunnel to tunnel bridge and the fourth suspension bridge in China to cross a valley so wide it seems to be connecting two mountain ranges. The first three were the Siduhe, Balinghe and Beipanjiang 2009 bridges. Of the world's 400 or so highest bridges, none will have a main span as long as Aizhai with a tower to tower distance of 3,858 feet (1,176 mtrs). Located deep in the heart of China’s Hunan Province near the city of Jishou, the suspension bridge is the largest structure on the Jishou to Chadong expressway with a deck 1,083 feet (330 mtrs) above the DeHang Canyon.

The two tunnels on either side of the Aizhai bridge allowed the engineers to use the mountain top for the location of one of the towers, reducing its height to just 165 feet (50 mtrs) - unusually short for a bridge with a span nearly as long as the Golden Gate bridge at 3,858 feet (1176 mtrs). In addition to cost savings, the stubby support also allows the bridge to blend more naturally into its surroundings. The taller bridge tower is no less unique with side span cables that soar down the backside of a mountain, making first time visitors quizzical as to what exactly lies ahead. With most of the structure hidden from view, the bridge will come as a jaw-dropping surprise whether you enter the canyon from either tunnel. Due to a gap of approximately 328 feet (100 mtrs) between the last truss suspenders and the tops of the bridge towers, the engineers added some additional ground anchored suspenders to stabilize the two massive suspension cables and reduce any oscillations that could damage other components of the bridge. An overlook and visitors center will offer additional views of the broad valley.


Aizhai1176FinalElev.jpg

Aizhai Bridge Elevation


2012年即将通车的矮寨大桥,将会是世界上最高的两端均与隧道相接的悬索桥,同时,也将是中国的第四座跨越大峡谷的悬索桥,它将跨越的峡谷如此之宽,令其远观就像与两侧山峦相连一样。另三座跨越峡谷的大桥分别是四渡河大桥、坝陵河大桥和北盘江大桥(2009年建成,镇胜高速上)。位于中国湖南省腹地并毗邻湖南吉首市,矮寨大桥是吉首至茶洞高速公路上最大的桥梁,其桥面将距德夯大峡谷谷底330米。

矮寨大桥两端接线的隧道,给桥梁工程师们提供了足够的场地条件,使他们能够在山顶上建设主塔,这样就能将其中一侧的主塔的高度减少到仅仅只有50米-这对一座跨径几乎与1176m跨的金门大桥相当的悬索桥而言,主塔高度可谓是相当之矮。除了建设成本上的节约之外,粗壮的支承体系允许桥梁结构能够有更多的挠曲空间。较高一侧的主塔也依然独特,边跨的钢主缆索远远的飞跃到隧道口后方的锚固到高山侧崖上,这些都令甫至胜境的游客不禁的好奇坐落前方的究竟为何。结构大部分都在崇山峻岭之间隐藏着,不论你从峡谷哪一侧的隧道驶出,大桥的出现绝对足以让人惊讶的下巴掉下来。由于在大桥最后的桁架节段吊杆与主塔塔顶间约有100米的间隔,工程师们便增加了一定数量的地锚拉杆,以稳定两根庞大的悬索钢缆并可以尽量降低会造成大桥其他构件破坏的振动。建设一个瞭望观光平台和旅游中心更将能提供欣赏大峡谷的宽广视角


Click on Page 2 for the Aizhai Truss Launch, Construction Views and More!

This entry has 2 pages: 1 | 2