Difference between revisions of "Beipanjiang Railway Bridge Qinglong"
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Revision as of 20:18, 19 May 2016
Beipanjiang Railway Bridge Qinglong
晴隆北盘江大桥
Qinglong, Guizhou, China
968 feet high / 295 meters high
1,460 foot span / 445 meter span
2016
The Beipanjiang River is a barrier that seems to require engineers to create world record bridge spans. This tradition began in 2001 when the first record breaking high railway arch crossing took place near Fa’er Bouyei with a rail to river drop of 275 meters. Things have changed a lot in China between 2001 and 2015 and most of the newer railway lines are being designed and built for high speed trains reaching speeds of 250 kilometers an hour.
The massive Beipanjiang River railway arch is not only the world's highest railway bridge at 283 meters if you exclude Najiehe which is over a reservoir, but is also the world's longest concrete arch ever built with a span of 445 meters. The crossing is the crown jewel of bridges on the high speed railway line connecting Guiyang and Kunming. Located north of Qinglong city, the Beipanjiang has always been Guizhou's second greatest river after the Wujiang.
Designed to carry trains that will reach speeds of 250 kilometers an hour, the 721 meter long crossing has a main arch with a rise of 100 meters and a rise to span ratio of 4.45. The arch ring cross section has three cells within a single-box with equal depth of 9 meters and a variable width of 18 to 28 meters. The width of the arch at the springing is 28 meters while the width of the arch at the crown is 18 meters. Double-column framed piers are used for supporting the deck. The piers rise 102 meters at the abutments with the tallest spandrel column on the arch rising 59 meters. Steel tubular trusses filled with concrete were used as a skeleton during construction before it was encased in concrete. The stay cables placed at the abutment pier were post-tensioned step by step during the concrete-pouring to assist the skeleton in load carrying.
The approach bridges are 5.6 +32 +2x65 +4x42 +4x42 +2x65 +2x37 +6.6 meters prestressed concrete continuous beams. The dual line width of unballasted track is 4.6 meters wide and crosses the Beipanjiang River just below the Guangzhao Dam.
The deformation of the arch ring increased gradually as the volume of arch ring concrete increased during the construction process. The maximum deflection was designed to be 294mm after pouring of the arch ring concrete was completed and 383mm after the additional dead load was placed. Because live load accounts for a small proportion of dead load, precamber of the arch ring is designed based on the deformation caused by dead load. At the arch crown, the precamber of 350mm is set, while the cambers of other parts of the arch ring are distributed by quadratic parabola. Under the standard railway live load, the maximum upward vertical deflection is 40.2mm which occurs at the quarter-span section and the maximum downward vertical deflection is 48.8mm which also occurs at the quarter-span section. Under the lateral wind load, the maximum lateral displacement is 52.8mm which occurs at the mid-span section.
The bridge is located at kilometer 882 and cost 430 million Yuan or 66 million dollars. The Beipanjiang Railway Bridge is a sister bridge to the slightly smaller Nanpanjiang Railway Bridge near Qiubei, Yunnan as they were both designed by the same engineering teams with similar designs and construction methods. The major difference between the two spans is the Beipanjiang Bridge arch rib has a depth of 9 meters while the Nanpanjiang arch rib has a depth of 8.5 meters.
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
Image from Tadashi Ashimi.
Image from Tadashi Ashimi.
Image by Han Ruoyu.
The east slope of the Beipanjiang Qinglong Railway arch was covered with an assortment of anchors that will assure the long term stability of the earth. Image by John Hart.
Image by Richard Scott.
Image by Richard Scott.
Image from Tadashi Ashimi.
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
The large Guangzhao concrete gravity dam is located just a kilometer upstream of the Beipanjiang Qinglong Railway Bridge. Image by Richard Scott.
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
This style of cantenary suspension bridge is popular downstream of dams in Western China. Image by John Hart.
Image by Eric Sakowski / HighestBridges.com
Image by Damian Kulash Sr.
Image by www.zgqxn.com.
Image by Eric Sakowski / HighestBridges.com
Bridge construction supervisor Derek Fu and lead bridge designer Xie Hai Qing. Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
Image by John Filmer.
Image by John Filmer.
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
Image by Peter Wu.
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
Image by John Filmer.
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
Image by www.qbnews.cn.
Image by gz.xinhuanet.
Image by gz.xinhuanet.
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
Beipanjiang Railway Bridge Qinglong pier diagram.
Beipanjiang Railway Bridge Qinglong abutment diagrams.
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
The span of steel tubular truss is 445m. It is longitudinally divided into 40 segments for lifting and the length of each segment is 12m. The truss is made of the upper and lower chords of 8 steel tubes with a diameter of 750mm and a thickness of 24mm.Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
Image by Eric Sakowski / HighestBridges.com
Map of Shanghai-Kunming High Speed Railway line.
Image by ldqxn.com.
The canyon before construction began.
Beipanjiang Railway Bridge Qinglong Proposals
A number of bridge designs were studied for the Beipanjiang High Speed Railway Bridge. Three locations were considered for the crossing including the middle route that was eventually chosen. All 7 proposals shown below are for the middle route but the heights vary between 230 meters for a smaller concrete arch to a giant suspension bridge 405 meters high.
Beipanjiang Railway Bridge Qinglong Strut Proposal - 230 meters high
Beipanjiang Railway Bridge Qinglong Suspension Proposal - 405 meters high
Beipanjiang Railway Bridge Qinglong Truss Arch Proposal - 290 meters high
Beipanjiang Railway Bridge Qinglong Cable Stayed Proposal - 290 meters high
Beipanjiang Railway Bridge Qinglong Concrete Filled Steel Tubular Proposal - 290 meters high
Beipanjiang Railway Bridge Qinglong Through Arch Proposal - 290 meters high
Beipanjiang Railway Bridge Qinglong Low Concrete Arch Proposal - 230 meters high
Map showing the 3 crossings studied.
Beipanjiang Railway Bridge Qinglong satellite image.
Beipanjiang Railway Bridge Qinglong location map.