CCTV News: Flowers bloom in May and are fruitful. In the past few days, Shenzhou has flown into the sky, aircraft carrier sea trials, and Chang'e has explored the moon, from the vast sky to the deep blue ocean, with good news and good news. At the same time, during this "May Day" holiday, there are still a number of major projects that have been steadily advanced, constantly innovating and achieving breakthroughs.
The second phase of the Ningbo-Zhoushan Port Liuheng Highway Bridge is a key control project of the Shuangyumen Navigation Hole Bridge, which is the largest span cross-sea bridge in the mainland. During the "May Day" period, this national key project is preparing to complete the on-site construction of the first "steel skeleton + steel prefabricated components" overall hoisting in China.
The mainland's largest span sea-crossing bridge challenges the first overall hoisting in China
Huang Chong is the main player of this young team. At the scene, he was checking the binding of the cushion block and the welding of the rebar, once the sagging or deviation of the cushion block occurred, it would lead to the subsequent control of the rebar protective layer was not in place.
The thickening of the protective layer multiplies the difficulty of tamping the concrete and controlling the appearance of the whole lifting process. The steel structure frame of the overall hoisting includes 16 H-shaped steels and 840 main reinforcements, with a total weight of 150 tons, which is equivalent to lifting 100 family cars at one time.
After the 150-ton steel frame structure is lifted, more than 800 joints must be accurately docked at an altitude of 40 meters, and the docking error of each joint must be controlled within 5 mm. Therefore, the overall hoisting tests not only the fineness of the frame structure processing, but also the operation proficiency of the on-site construction personnel.
Huang Chong basically has to run four or five times a day to the 20-meter-high tower, and after 10 months of wind and sun, the 24-year-old has extremely dark skin.
Recently, there has been a continuous period of dense fog and heavy rain on the island, and in order to ensure that the construction period is not affected, night shift construction has become commonplace.
At 8:30 p.m., the sound of excavators at the scene was still deafening. At present, the last large-diameter string foundation of the project is in the 24-hour excavation phase. Weng Jianmin, a "post-00" technician, has to go to the bottom of the hole every day to measure data, and the ladder cage more than ten meters high has to climb back and forth at least 4 times a day.
After the completion of the second phase of the Liuheng Highway Bridge of Ningbo Zhoushan Port, it will promote the implementation of the national marine economic development strategy and the construction of a national-level new area, further improve the external traffic conditions of the southern archipelago of Zhoushan, and optimize the spatial layout of the Zhoushan Archipelago New Area, build a modern marine industry base, and realize the linkage development of the port area and industry of Liuheng Island, Fodu Island and Meishan Island.
Source: CCTV