The picture shows the bridge
China's infrastructure is a hot topic of global discussion. In recent years, the development of domestic infrastructure has been witnessed by all the world. Various complex projects have been built and have been recognized around the world. For example, the Hong Kong-Zhuhai-Macao Bridge project has set many world records. It is known as the eighth wonder of the new century. However, there is another bridge in China that has also set multiple world records. It is the Pingtan Strait Road and Railway Bridge in Fujian, which is the longest sea-crossing bridge in the world. The road-rail dual-purpose bridge took 7 years and cost tens of billions to construct, and its construction was difficult to achieve beyond imagination.
The picture shows the bridge
Pingtan High-speed Railway Dual-purpose Bridge is a milestone project in China's bridge industry. This bridge uses 2.7 million tons of cement and 853,000 tons of steel. It can build 10 Burj Khalifa in Dubai. It is China's first sea-crossing project. The road-rail dual-purpose bridge is also the longest cross-strait dual-purpose bridge in the world. The bridge is 16,340 meters long. The upper level is designed as a highway with a speed of 100 kilometers per hour, and the lower level is designed as a double-track first-class railway with a speed of 200 kilometers per hour. It is located in Fuzhou, Fujian Province. City, connecting Songxia Town, Changle District, and Suao Town, Pingtan County.
The picture shows the bridge
The Pingtan Strait where the bridge is located is one of the three major wind sea areas in the world. It has the characteristics of strong winds, high waves, deep water, and rapid currents. According to statistics, there are more than 300 days of strong winds above level 6 every year, 7 Category 1 or higher winds lasted for more than 200 days, and the maximum wave height was about 9.69 meters. It was once known as the "bridge construction forbidden zone". The construction conditions were far worse than those of the completed Donghai Bridge, Hangzhou Bay Cross-sea Bridge and Hong Kong-Zhuhai-Macao Bridge, especially the wave currents. The impact of the force is more than 10 times that of conventional inland river bridges such as the Yangtze River, making construction more difficult and risky. The "behemoth" standing on the sea requires data accurate to the millimeter level during construction. In the north-dongkou section of the Pingtan Strait Road-rail Dual-Use Bridge, the highway bridge has a total of 58 spans. Among them, the single span length of the main bridge is the longest. 168 meters, there are 25 cantilever segments on one side of a single pier. During construction, the elevation error of the beam body of each segment must be controlled within 5 mm, and the coordinate error must be controlled within 2 mm. In addition, in order to build the bridge smoothly, domestic A lot of bridge-building equipment was also specially developed.
The picture shows the bridge
Due to the harsh environment of the Pingtan Strait bridge construction, the traditional steel box girder component installation method cannot meet the needs of bridge construction. In order to reduce safety risks and improve construction efficiency, China Railway Bridge Bureau spent 3 years , costing 340 million to build the "Bridge Seagull" self-propelled jib luffing crane ship. This suspension bridge artifact can erect 3,600 tons of steel box girders on the bridge piers at one time, making it the country's largest lifting capacity and highest lifting height. The emergence of the crane ship has accelerated the construction progress of the Pingtan Strait Bridge . The Pingtan Strait is picturesque, but everyone here is engaged in projects in harsh typhoon waters. Almost everyone has an indissoluble bond with wind. The project has experienced more than 30 typhoons, including the "" in 2015. The wind force of Sudiro " reached level 14. At that time, the crane and the house were all blown down, and the mobile board house used for office accommodation moved more than 30 meters. However, even if the conditions were difficult, Chinese engineers were still not afraid of hardships and built a global bridge. The Pingtan Strait road-rail dual-purpose bridge plays an important role in the world.
