Recently, Shawei-Zuojiang Grand Bridge, the x-arch bridge with the world's largest span and concrete-filled steel tube highway has successfully realized precise closure of the arch ribs, laying a solid foundation for the completion and opening of Nanning Wuxu Airport - Long'an Expressway in 2021.
Shawei-Zuojiang Grand Bridge is 968.5 meters long, with a half-through, concrete-filled steel, tubular x-arch main span of 360 meters. There are 32 arch ribs in the whole bridge, and the maximum segment weight is 144 tons. According to Ma Wenhui, executive deputy chief engineer of Wulong No.2 Branch Project of Guangxi Road and Bridge Engineering Group Co., Ltd., by adjusting the hoisting process, changing the position of large hoisting point, increasing the side wave wind of upper chord and other measures, the project successfully applied the technology of "positive hoisting and positive buckling" to hoist the arch rib of x-arch bridge for the first time. Next, Shawei-Zuojiang Grand Bridge will step into the main arch pipe concrete pouring stage.