The caisson of No. 6 main pier of Changtai Yangtze River Bridge designed by China Railway Major Bridge Reconnaissance Design Institute (BRDI, a subsidiary of CREC) and constructed by China Railway Major Bridge Engineering Group (MBEC, a subsidiary of CREC) has been placed into the Yangtze River and sealed at its lower end. Weighing over 220,000 tons and with a height of 72 meters, it is the world's largest underwater foundation under construction.
The Changtai Yangtze River Bridge is the first cross-river channel over the Yangtze River that integrates expressways, intercity railways, and highways. With a main span of 1,176 meters, it will be the world's largest-span cable-stayed bridge after completion. The caisson of the No. 6 main pier is 95 meters long and 57.8 meters wide, the size of 13 standard basketball courts. Submerging such a large caisson stably is incredibly difficult. The team members have developed 13 sets of new equipment, increasing the construction efficiency by 4-6 times and ensuring the completion of this challenging task.
