Wuhan Tianxingzhou Yangtze River Bridge is located in Wuhan City, Hubei Province. It starts from Pinganpu in Hankou in the northwest and ends at Wuqing Avenue in Wuchang in the southeast. This bridge is the sixth Yangtze River bridge in Wuhan, the second highway-railway bridge and the key project of the Third Ring Road in Wuhan.
The foundation stone of the bridge was laid on June 5438+February 2003, started on September 28, 2004, closed on September 10, 2008, and was completed and opened to traffic on February 26, 2009. The bridge is the largest railway bridge in the world, and the lower floor is a railway that can run four trains in parallel, with a total investment of about 1 106 billion yuan.
On 20 14, Wuhan Tianxingzhou Bridge "Construction Technology of Cable-Stayed Bridge with Three Cable Planes and Three Main Trusses for Highway and Railway" won the first prize of national scientific and technological progress, which is the only bridge project that won the first prize of national scientific and technological progress in recent three years.
abstract
Wuhan Tianxingzhou Yangtze River Bridge is a highway-railway bridge. This project is jointly built by Wuhan and China Ministry of Railways. The bridge is located at the downstream of Wuhan Yangtze River Bridge 10 km, starting from Pinganpu in Hankou in the northwest and ending at Wuqing Avenue in Wuchang in the southeast. The main bridge is 4657 meters long and the main span is 504 meters. The total length of highway lead is 8043 meters, the total length of railway lead is 60.3 kilometers, and the whole bridge is * * * 9 1 pier.
The Tianxingzhou Yangtze River Bridge in Wuhan is the second cable-stayed bridge with both highway and railway after the Wuhan Yangtze River Bridge, and the first long-span cable-stayed bridge with both passenger and freight in the world, which can bear 20,000 tons of load at the same time, and is the largest cable-stayed bridge with both highway and railway in the world. At the same time, Wuhan Tianxingzhou Bridge is also the first long-span cable-stayed bridge in China that can meet the operation of high-speed railway. Its four-lane railway is Beijing-Guangzhou high-speed railway and Shanghai-Han Rong passenger dedicated line, in which the design speed of Shanghai-Han Rong passenger dedicated line is 250 km/h, and the upper layer is 6-lane expressway, with the design speed of 80 km/h; The lower floor is a railway that can run four trains in parallel, with a design speed of 200 kilometers per hour. The length of highway approach bridge is 5.1km; The newly-built railway line is 22.6 kilometers long.
Wuhan Tianxingzhou Yangtze River Bridge has a total length of 4,657 meters and a main span of 504 meters. Four railway lines are laid on the pavement of the bridge. It is the first four-lane cable-stayed bridge in China, which ranks first in the world in span, load, speed and width.
parameter
Wuhan Tianxingzhou Yangtze River Bridge is the world's first cable-stayed bridge with two towers, three cable planes and three main trusses built according to the four-line railway. Its main bridge is 4,657 meters long, with 9 1 pier, and the total concrete volume is about 850,000 cubic meters, including 2,842 meters of public railways. The upper highway is six lanes with a width of 27 meters. The lower level railway has four lines, including two first-class trunk lines and two passenger dedicated lines. Nancha main bridge is a (98+196+504+196+98) meter cable-stayed bridge with twin towers and three cable planes. The main girder of the cable-stayed bridge is a plate truss combined with a steel truss, with three main trusses, the truss width is 2× 15m, the total length of steel beams is 1092m and the total weight of steel beams is 46,000 tons. The main tower adopts reinforced concrete structure, and the height above the bearing platform is 188.5m: there are 3× 16 stay cables on both sides of each tower; The maximum cross section of the stay cable is 45 1 φ 7mm galvanized parallel steel wire, the maximum cable force is about 1250 tons, the maximum cable length is 27 1.9m, the weight is 4 1.2 tons, and the total weight of the stay cable is 4,550 tons.
This bridge has "span, speed, load and width" among similar bridges in the world today. First, the main span of the cable-stayed bridge is 504 meters, which is the first span of the world highway-railway bridge; It can bear 20,000 tons of load at the same time, and it is the bridge with the largest load in the world at present. It can meet the running speed of 250 kilometers per hour, ranking first in the world; The main truss is 30 meters wide, ranking first among similar bridges in the world. The main bridge adopts a new structural type of three main trusses and three cable planes for the first time; Highway deck adopts the combination system of orthotropic slab and concrete slab, and railway deck adopts the combination system of concrete ballast trough slab. The most difficult part of the bridge, the joint construction of public railways, is undertaken by China Railway Bridge Bureau Group Co., Ltd., the champion of bridge construction in China.
scale
Wuhan Tianxingzhou Yangtze River Bridge is magnificent in momentum and construction scale, and its engineering quantity is equivalent to the sum of Wuhan Yangtze River Bridge and Wuhu Yangtze River Bridge.
The bridge was officially started on September 28th, 2004. It integrates many new bridge technologies, new structures, new technologies and new equipment. It is the fifth milestone of China's highway-railway dual-purpose bridge construction after Wuhan, Nanjing, Jiujiang and Wuhu Yangtze River Bridge, representing the highest level of bridge technology at home and abroad, and is a new leap in the history of China's railway construction.
Sixian
Tianxingzhou Bridge has four items of "span, load, speed and width" among similar bridges in the world today. First, the main span is 504 meters, which is 14 meters longer than the world's second Danish Oresund Bridge; It can carry 20 thousand tons of load at the same time. According to the calculation of four railway lines and six-lane highway of Tianxingzhou Bridge, the bearing capacity is at least six times that of the Second Yangtze River Bridge. The railway bridge is designed as a 250 km/h high-speed railway; The main truss is 30 meters wide and can parallel four trains at the same time.
Tianxingzhou main channel is in the south branch, with a main span of 504 meters, which meets the navigation needs. Tianxingzhou Bridge is also a part of the Third Ring Road. The transportation volume of railways and highways is very large, and the load of 20,000 tons can meet the needs. Tianxingzhou Bridge is an important part of Beijing-Guangzhou high-speed railway. The line is designed at 350 km/h, and the speed of Tianxingzhou Bridge in the urban area is slightly reduced. Tianxingzhou Bridge has many trains and is designed according to 4 lines, so its width ranks first among similar bridges.
Research time-consuming
On September 28th, 2004, the Tianxingzhou Bridge was started. The feasibility study and scheme design of the bridge have been carried out for 12 years.
At first, the bridge only designed a double-track railway according to the needs at that time, not a high-speed rail. With the development of economy and the adjustment of railway network planning, in 2002, the railway was changed to three lines. Since the Beijing-Guangzhou and Shanghai-Chengdu high-speed passenger dedicated lines (Wuhan section) all cross the river by Tianxingzhou Bridge, one year later, the bridge was finally determined as a four-lane railway, including a two-lane high-speed railway.
life
The design service life of Tianxingzhou Bridge is 100 years, and it can resist 7-degree earthquake, 1 1 strong wind and once-in-a-century flood. The pier of the main navigation hole can prevent the collision of 5000 tons of ships, which is firm and reliable. The exposed part of bridge steel structure shall be surface treated according to the highest requirements at present, and then painted with three layers of paint: primer, intermediate paint and fluorocarbon topcoat.
bridge construction
The structure of "one bridge, two systems" of Tianxingzhou Bridge is unique in the world: taking Tianxingzhou Zhoutou as the boundary, the southern section is a cable-stayed bridge with highway and railway; The northern section of the bridge is a prestressed concrete continuous beam bridge, which is divided into two at Zhoutou, with a highway bridge in the upstream and a railway bridge in the downstream. Gao explained that the south branch waterway of Tianxingzhou is deep and has always been the main waterway. The cable-stayed bridge designed in the south can meet the requirements of navigation width and clearance. But in terms of cost, the investment of cable-stayed bridge is much higher than that of ordinary bridge. Tianxingzhou North Branch is shallow and mainly used for flood discharge. Therefore, the beam bridge scheme with a span of 80 meters is adopted to reduce investment and meet the navigation needs of small boats.
technology application
All railway bridges on the Yangtze River adopt open deck, that is, bridge sleepers are directly laid on longitudinal beams or main beams.
Due to the high design speed of Tianxingzhou Bridge, in order to ensure safety and reduce noise, the railway bridge will adopt a ballasted deck composed of ballasted trough slab, ballast, sleeper and rail for the first time.
traffic
There are four supporting interchanges at both ends of the bridge, namely: Han Shi Highway, Heping Avenue, Youyi Avenue and Tsinghua Road Interchange.
Hanshi Interchange is a two-story overpass, Heping Avenue Interchange is a two-story roundabout overpass, and Youyi Avenue Interchange is a two-story roundabout overpass. Tsinghua Road Interchange has a total length of 2442.5 meters and a bridge width of 27 meters.
After the completion of the highway lead of Tianxingzhou Bridge, it will not only open a new river-crossing channel between Qingshan District and Hankou, but also play an important role in traffic relief along Jiefang Avenue, Heping Avenue, Youyi Avenue and Wuhan Railway Station.
Tianxingzhou Bridge Highway connects the second north-south artery of China Railway: Beijing-Guangzhou Passenger Dedicated Line and Shanghai Railway, which is an important east-west passage. It is also the last section of Wuhan Third Ring Expressway.
meaning
Tianxingzhou Bridge has created the fifth milestone of China Railway Bridge. The top four are Wuhan Yangtze River Bridge, Nanjing Yangtze River Bridge, Jiujiang Yangtze River Bridge and Wuhu Yangtze River Bridge. These bridges have witnessed the self-reliance struggle of Chinese bridge builders, and the design, materials and construction methods are constantly improving.
Wuhan Yangtze River Bridge is a steel truss bridge with a main span of only128m. It is designed with a four-lane expressway and a double-track railway. The railway is a first-class railway, with an initial design speed of only 80 km/h. It took more than 20,000 workers to build the Wuhan Yangtze River Bridge. Half a century later, Tianxingzhou Bridge was completed. Modern large-scale equipment has made the construction efficiency unprecedented, with less than 2000 builders at most.
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