Difference between revisions of "Daduhe Bridge Xingkang"

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Revision as of 00:34, 16 April 2017

Daduhe Bridge Xingkang
大渡河兴康特大桥
Luding, Sichuan, China
935 feet high / 285 meters high
3,609 foot span / 1,100 meter span
2018

DaduheLudingGiantSuspensionRenderClose.jpg


Crossing a wide reservoir from a downstream dam just north of Luding city, the giant Daduhe suspension bridge is the largest structure on the Ya'an to Kangding expressway. Like many of China's Westernmost highways, this extension from the G5 expressway came many years after the more populous cities had already been connected in northern and eastern Sichuan Province. The Kanding route was especially difficult to construct with an amazing 82% of the road on bridges or in tunnels.

Located at kilometer 99, the alignment chosen for the Daduhe Bridge resulted in an unusual design for the east end where the anchorages had to be placed high up inside the steep mountain slope. To avoid compromising the strength of the deep underground anchorage, the engineers split the east-west lanes apart into tunnels separated by more then 100 meters, keeping the alignment off to the sides of the cable anchorage. The deck of the Daduhe Bridge is approximately 235 meters above the full lake level or 285 meters to the original level of the Dadu River. The main cable has a 9.5:1 span to rise ratio.

The construction of the truss will follow an unusual pattern first implemented on the Aizhai Bridge in Hunan Province where each truss piece will be pulled and rolled along with wheel bogies that travel along horizontal wires hanging from the suspender cables. The wheel bogies travel back to the cliff side staging area to carry another truss section out and the process repeats until the truss is completed.

Luding was already one of the most famous cities in Western China for its legendary chain bridge of 100 meters that ranked among the longest suspension bridges in the world since its completion in 1701. Several historic battles have taken place at or near the chain bridge due to its strategic importance, most notably during the Long March in 1935.

The Daduhe Bridge at Luding is one of at least a dozen major suspension bridges that have opened in China since 2009 that have span lengths of approximately a kilometer or longer and deck heights of 200 to 500 meters.


DaduheLudingElevationFinal.jpg

Daduhe Xingkang Bridge Elevation


雅康高速大渡河大桥是这条高速公路上最引人注目的工程,位于泸定县城以北,跨越一个宽阔的水库。就像中国西部边疆其他高速公路一样,这条高速公路是G5京昆高速的支线,在人口稠密的四川盆地内高速公路网建好后才开始修建。雅康高速公路难度极大,桥梁隧道占比达到惊人的82%。

该桥位于99公里处,由于地形的关系,这座桥有一个世界独一无二的设计,东端隧道锚锚固在引桥桥头隧道顶的山崖上。为避免隧道锚穿入桥东端公路隧道,东端的隧道是分离式的,入洞后不久就分开,中间间隔百米以上。隧道锚正好插入往返的高速公路隧道之间。此桥桥面高于泸定水库满水位235米,相当于大渡河原始水位280米高。

该桥钢桁梁使用轨索滑移法吊装,这种方法首次应用于湖南矮寨大桥,参见:


Daduhe Luding draw.jpg


DaduheLudingAerialRender.jpg


DaduheLudingDrawingView.jpg


Daduhe Bridge XingkangCatwalksComplete.jpg


Daduhe Bridge XingkangCatwalkTower.jpg


Daduhe Bridge XingkangTowerDownView.jpg


Daduhe Bridge XingkangWaterCatwalks.jpg


Daduhe Bridge Xingkangcatwalkworkers.jpg


Daduhe Bridge XingkangWireSpinning.jpg


Daduhe Bridge XingkangCatwalkRiver.jpg


Daduhe Bridge XingkangTowerTop.jpg


DaduheXingkang catwalk1.jpg


DaduheXingkang catwalk2.jpg


DaduheXingkang catwalk3.jpg


DaduheXingkang catwalk4.jpg


DaduheXingkang catwalk6.jpg


DaduheXingkang catwalk5.jpg


DaduheLudingTowerTopping.jpg


DaduheLudingTowersView.jpg


DaduheLudingGiantSuspSideWBridge copy.jpg

Image by Eric Sakowski / HighestBridges.com


DaduheLudingTowerTopCranes.jpg


DaduheLudingDrone&GreenSlope.jpg


DaduheLudingTowerTop&River.jpg


DaduheLudingTowerTopCrane.jpg


DaduheLudingTowerTop.jpg


DaduheTowerAerial.jpg


DaduheLudingWire7.jpg

Daduhe Luding Bridge drone carrying the first pilot line between the towers.


DaduheLudingWire3.jpg


DaduheLudingWire6.jpg


DaduheLudingWire5.jpg


DaduheLudingWire4.jpg


DaduheLudingWire.jpg


DaduheLudingGiantSuspensionRiverView.jpg

Image by Eric Sakowski / HighestBridges.com


DaduheOne Panorama.jpg

Image by Eric Sakowski / HighestBridges.com


DaduheLudingGiantSuspensionLonglens.jpg

Image by Eric Sakowski / HighestBridges.com


DaduheLudingGiantSuspensionPanorama.jpg

Image by Eric Sakowski / HighestBridges.com


DaduheLudingGiantSuspensionLakeLonglens.jpg

The Daduhe River reservoir and the upstream dam intake tunnels. Image by Eric Sakowski / HighestBridges.com


DaduheLudingGiantSuspensionWestSlope.jpg

Daduhe Luding Bridge west slope. Image by Eric Sakowski / HighestBridges.com


DaduheLudingGiantSuspensionEastSlope2.jpg

Image by Eric Sakowski / HighestBridges.com


DaduheLudingVideoGrab1.jpg




DaduheLudingVideoGrab2.jpg




DaduheLudingVideoFoundation.jpg




DaduheLudingVideoGrab3.jpg




DaduheLudingVideoGrab4.jpg




DaduheLudingVideoGrab5.jpg




DaduheLudingVideoGrab6.jpg




DaduheLudingVideoGrabTruss.jpg




DaduheLudingVideoGrabTruss2.jpg




DaduheLudingGiantSuspensionTruss.jpg


DaduheLudingVideoGrabWide.jpg


DaduheLudingVideoPierConst.jpg


Daduhe Luding bridge.jpg


DaduheLudingWestSlope.jpg

Daduhe Bridge west slope tower location.


LudingDaduheEastSlope.jpg

Daduhe Bridge east slope tower location.


DaduheLudingGiantSuspEastViaduct.jpg

A large viaduct is located just before the east tunnel entrance leading to the Daduhe Luding Bridge. Image by Eric Sakowski / HighestBridges.com


DaduheLudingWestTower.jpg

Early Daduhe Luding Bridge West Tower design that was scrapped.


DaduheRiver.jpg

Daduhe River area near the bridge crossing.


LudingChainSide.jpg

Luding Chain Bridge.


LudingChainUnder.jpg


LudiingChainBridge.jpg


DaduheLudingChain3.jpg

Image by Eric Sakowski / HighestBridges.com


DaduheLudingChain4.jpg

Image by Eric Sakowski / HighestBridges.com


DaduheLudingChain10.jpg

Image by Eric Sakowski / HighestBridges.com


DaduheLudingChain18.jpg

Image by Eric Sakowski / HighestBridges.com


DaduheLudingChain26.jpg

Image by Eric Sakowski / HighestBridges.com


DaduheLudingChain33.jpg

Image by Eric Sakowski / HighestBridges.com


DaduheLudingSatellite&Bridge.jpg

Daduhe Bridge Xingkang satellite image with the approximate location of the bridge drawn in.


DaduheLudingSatelliteWide&Bridge.jpg


DaduheLudingLocationMap.jpg

Daduhe Bridge Xingkang location map.


DaduheLudingLocationMapWide.jpg