The picture shows the Pingtan Strait Bridge
China has invested 1.1 billion yuan to build a super project, which is unimaginably difficult, and some experts even assert that this bridge is more difficult than building the Hong Kong-Zhuhai-Macao Bridge. It is China's construction of the Pingtan Strait Bridge, which connects two important areas of Fujian Province, so how significant is its completion? This not only made the world aware of China's infrastructure strength, but also laid the foundation for the future construction of a bridge across the strait.
The picture shows a panoramic view of the Pingtan Strait Bridge
In order to carry out the construction of the Pingtan Strait Bridge, the Chinese engineering team overcame a series of difficulties, the sea breeze that came to the construction site was the first difficulty, due to the narrow pipe effect, even in the case of non-typhoons, the wind in this area may reach more than 10 levels, such gusts of wind even played a very negative impact on the hoisting of the bridge deck, so the engineering team spent three years to create the largest lifting weight in China, the highest lifting height of the double-arm crane ship bridge Seagull, relying on its strong performance, The lifting of the bridge was successfully completed under the strong winds in the area, which greatly accelerated the construction progress, and facilities such as windproof walls were added to the bridge to ensure that high-speed rail and cars would not be affected by high winds when passing through the bridge. The steel beam of the bridge is increased to 80 meters, and the longest one even reaches 88 meters, which can greatly reduce the number of piers, save costs, and facilitate the navigation of the ships below, and the Seagull also solves the problem of asymmetry of the center of gravity of the truss beam along the bridge, and the problem of hoisting being affected by wind and waves.
In addition to the wind roaring above the water, the bedrock hidden under the water also brings great difficulties to the construction of the bridge, generally speaking, the construction of the bridge on the water needs to first punch the foundation pile into the rock to support the pier, but when the engineering team tried to lay the first foundation pile, but found that the steel pipe was loaded into the rock bed less than one meter, it was deformed and directly scrapped due to extrusion, and finally the test results on the rock showed that its hardness was comparable to steel, how is this good? The creative Thinking Chinese team finally came up with a solution, that is, to use the seabed scanning technology to find out the seabed condition of the location, and then put a number of steel pipe piles of the right length into a predetermined position, and then use beams to weld these steel pipes into one, and then use impact drills to pass through each steel pipe pile, drill a pile hole with a depth of 1 to 2 times the diameter in the seabed rock, and inject concrete rivet piles, thus forming a bench-like structure. At this time, it was expanded outwards as a deep-water bare rock drilling construction platform, and finally the world's most advanced kty5000 hydraulic power head drilling rig specially developed by the China Railway Bridge Bureau was used to drive the rock-embedded pile with a diameter of 4.5 meters into the seabed, completely conquering this hard rock seabed and creating a solid bridge pier foundation.
The picture shows the bridge under construction and the crane ship Seagull
After the completion of the project, the former strait graben changed its route, the railway from Fuzhou to Pingtan was also opened, and the traffic between the two places took only 30 minutes, completely ending the history of the fifth largest island in China without a railway, it can be said that this project can effectively improve the transportation network in northeast Fujian, promote the development of the whole Fujian and the economic and social exchanges between the two sides of the strait.