On the morning of April 4, the construction of ballastless track for the first sea crossing cable-stayed bridge of high-speed railway in China, the newly-built Anhai Bay Bridge of Fuzhou Xiamen railway, was completed. The builders of China Railway Construction Bridge Bureau successfully solved the problem of ballastless track construction of high-speed railway sea crossing cable-stayed bridge and made a major breakthrough in ballastless track construction of high-speed railway. Anwan Bay super large bridge is one of the control projects of the new Fuzhou Xiamen railway, with a total length of 9.46 kilometers, of which the sea crossing section is 1.56 kilometers long. The main bridge is a steel-concrete composite beam cable-stayed bridge with double towers and double cable planes, with a main span of 300 meters and a main tower height of 126.9 meters. It crosses the 2000 ton main channel of anwan Bay. In the construction of high-speed railway in China, ballastless track is laid in the cable-stayed bridge across the sea for the first time. The high-speed railway train with a speed of 350 km / h does not slow down when crossing the bridge across the sea, and it takes less than 7 seconds to pass the 650 m main bridge. Fuzhou Xiamen high speed railway is the first cross sea high speed railway in China, with a design speed of 350 kilometers per hour and a total length of 277.42 kilometers. After the opening to traffic, the journey from Fuzhou to Xiamen was reduced to less than one hour, providing a strong impetus for building Fujian coastal "one hour economic circle". (news agency)