Difference between revisions of "Yachi Bridge"

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These unique circular anchors will be placed inside the thick concrete back span beams whose weight will be strong enough to counteract the weight of the all steel main span stretching 800 meters across the river channel. This unusual engineering solution was necessary to maintain the equal weight of a balanced cantilever since since the back spans are only half the length of the main span. Image by Eric Sakowski / HighestBridges.com  
 
These unique circular anchors will be placed inside the thick concrete back span beams whose weight will be strong enough to counteract the weight of the all steel main span stretching 800 meters across the river channel. This unusual engineering solution was necessary to maintain the equal weight of a balanced cantilever since since the back spans are only half the length of the main span. Image by Eric Sakowski / HighestBridges.com  
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Revision as of 03:18, 19 May 2016

Yachi Bridge
鸭池河特大桥
Daguanzhen, Guizhou, China
1,444 feet high / 440 meters high
2,625 foot span / 800 meter span
2016

Yachihe2016Closure.jpg


With a height of over 400 meters, the Yachi Bridge is not only the world's second highest cable stayed bridge but also one of the longest with a main span of 800 meters. Wedged between two long tunnels, the 1,461 meter long structure is supported by towers as tall as 258 meters. There is no other cable stayed bridge in the world in a mountain setting as colossal as Yachi Bridge. The 800 meter span is also a record for any truss-deck cable stayed crossing.

Despite an official height of over 400 meters, Yachi Bridge is actually only 306 meters above the surface of a huge reservoir more then 130 meters deep formed by the Yachi Dam that is located just 2 kilometers downstream. The road deck is at elevation 1,276 with the surface of the reservoir at 970 meters.

With steep slopes on both sides of the canyon, Yachi Bridge has unusually short but heavy concrete back spans of only 220 meters that counteract the pull of each of the 400 meter halfs of the 800 meter main span. The span configuration is 71+72+77+800+77+72+71 +8x30 meters. Yachi is the largest bridge on the 77 kilometer Guiyang to Qianxi 贵阳至黔西高速公路 expressway.

Yachi is one of several dozen bridges over the Wu River that are over 100 meters high. No other river on earth has as many high spans across its waters then the Wujiang. The Province of Guizhou has more high bridges within its borders then any other region on earth. All of the high bridges in Europe combined would not equal the number of Guizhou spans that exceed 100 meters in height.

Yachi Bridge might also hold the record for the fastest construction ever for a large size cable stayed span with a total construction time of 3 years. Crews were reportedly working 7 days a week on multiple shifts including holidays.


YachiheClosure.jpg

Yachihe2016Truss.jpg


Yachihe2016Truss.jpg


YachiheHighView.jpg


Yachihe expressway bridge 20160414.JPG


YachiBridgeView.jpg


241YachiTowerByJohnHart.jpg

Image by John Hart.


244YachiheElevator&Sky copy.jpg

Image by Eric Sakowski / HighestBridges.com


YachiheMidDeck.jpg

Image by Eric Sakowski / HighestBridges.com


YachiheMiddleDeck.jpg

Image by Eric Sakowski / HighestBridges.com


YachihePulleys.jpg

Image by Eric Sakowski / HighestBridges.com


YachiStagingDebris.jpg

Image by Eric Sakowski / HighestBridges.com


242YachiBeamsByRichard.jpg

Image by Richard Scott.


YachiWorksiteByRichard.jpg

Image by Richard Scott.


YachihePierDownView.jpg

Image by Eric Sakowski / HighestBridges.com


245YachiheWestTower&River copy.jpg

Image by Eric Sakowski / HighestBridges.com


246Yachihe Panorama copy.jpg

Image by Eric Sakowski / HighestBridges.com


247YachiCircleAnchors copy.jpg

These unique circular anchors will be placed inside the thick concrete back span beams whose weight will be strong enough to counteract the weight of the all steel main span stretching 800 meters across the river channel. This unusual engineering solution was necessary to maintain the equal weight of a balanced cantilever since since the back spans are only half the length of the main span. Image by Eric Sakowski / HighestBridges.com


YachiheApproachClose.jpg

Image by Eric Sakowski / HighestBridges.com


YachiheBackSpan.jpg

Image by Eric Sakowski / HighestBridges.com


248Yachi2015Side copy.jpg

Image by Eric Sakowski / HighestBridges.com


YachiWide2015View.jpg


Yachi2014View.jpg

Image by Eric Sakowski / HighestBridges.com


Yachi2014EastTowerLonglens.jpg

Image by Eric Sakowski / HighestBridges.com


YachiWestTower&Dam.jpg

Image by Eric Sakowski / HighestBridges.com


Yachibackspanconstruction.jpg

Image by Eric Sakowski / HighestBridges.com


Yachi&Ian.jpg

Image by Eric Sakowski / HighestBridges.com


YachiheWestQuadcopter.jpg


YachiWestTower&Crane.jpg

Image by Eric Sakowski / HighestBridges.com


YachiLakeAerial.jpg

Aerial view of the giant reservoir and the east tower.


YachiheEastTowerQuadcopter.jpg

Aerial view of the west tower that will eventually rise to 258 meters.


Yachi2014AccessRoad.jpg

Image by Eric Sakowski / HighestBridges.com


Yachi2014LookingEast.jpg

Image by Eric Sakowski / HighestBridges.com


YachiBridgeFacts.jpg

Image by Eric Sakowski / HighestBridges.com


YachiCraneLift.jpg

Image by Eric Sakowski / HighestBridges.com


Yachi2014Construction.jpg

Image by Eric Sakowski / HighestBridges.com


YachiEastTowerLonglens2014.jpg

Yachi east tower construction in 2014. Image by Eric Sakowski / HighestBridges.com


YachiEastTower&Cranes.jpg

Image by Eric Sakowski / HighestBridges.com


YachiEastTowerLonglens.jpg

Yachi Bridge east tower. Image by Eric Sakowski / HighestBridges.com


YachiEastTowerTopLonglens.jpg

Image by Eric Sakowski / HighestBridges.com


YachiLakeLonglens.jpg

Image by Eric Sakowski / HighestBridges.com


YachiTowerOpening.jpg

Image by Eric Sakowski / HighestBridges.com


YachiWestTower&Cliffs.jpg

A view of the taller west tower from the east side. Image by Eric Sakowski / HighestBridges.com


YachiWestTowerBase.jpg

Base of the west tower. Image by Eric Sakowski / HighestBridges.com


YachiWestTowerLonglens2014.jpg

West tower construction. Image by Eric Sakowski / HighestBridges.com


YachiSanchaheDam.jpg

Completed in 1995, the Yachi Dam is located 2 kilometers downstream of the bridge. Image by Eric Sakowski / HighestBridges.com


YachiSanchaDamWide.jpg

Image by Eric Sakowski / HighestBridges.com


DamNearYachiCrossing.JPG


YachiSanchaheDamBehind.jpg

Image by Eric Sakowski / HighestBridges.com


YachiDam.jpg


YachiSanchaheWide Panorama.jpg

Old and new crossing of the Wujiang River 1 kilometer north of the dam. Image by Eric Sakowski / HighestBridges.com


YachiSanchaheBridgesClose.jpg

Image by Eric Sakowski / HighestBridges.com


YachiSanchaheCables&Deck.jpg

Image by Eric Sakowski / HighestBridges.com


Dam&YachiBridge.jpg


Tianzhu peak.jpg

Tianzhu Peak overlooks the junction of 3 of Western China's greatest waterways - the Wujiang, Sancha and Liuchong Rivers.


TriareaLakePeak.jpg


YachiWorkers.jpg

Foundation work on one of the Yachi Bridge towers.


YachiExpresswaySatellite&Bridge.jpg

Yachi Bridge satellite image.


YachiExpresswayLocationMap.jpg

Yachi Bridge location map.


GuiyangToQianxiMap.jpg

Guiyang to Qianxi expressway map.