Recently, the comprehensive transportation hub project within the Changsha Airport Expansion and Renovation Project—the elevated bridge in front of the terminal and the comprehensive transportation hub—was successfully joined, marking another phased achievement in the comprehensive transportation hub project of the Changsha Airport Expansion and Renovation Project. The overall project is continuing construction while racing against time.
　　On August 8, the construction site of Concourse C of Terminal 3 at the Changsha Airport Expansion and Renovation Project was bustling: workers were methodically carrying out steel structure welding and civil construction of the boarding bridge truss floor deck, while metal roofing construction personnel were working on the top surface.
　　"At present, the main structure and secondary structure of Concourse C have been completed, the boarding bridge masonry has entered the site, and mechanical and electrical engineering as well as general decoration construction are being interspersed within the structure. More than 450 people on average work on the construction of the four concourses A, B, C, and D every day," introduced Liu Xiangqiong, production manager of the Terminal 3 project of Hunan Construction Investment and Construction Group. Hunan Construction Engineering Group is responsible for the construction of the four concourses A, B, C, and D. Concourse C covers an area of more than 20,000 square meters and is the longest concourse, with a total length of 386 meters. Among the works, the steel structure engineering is the most difficult, with an overall construction time of about 8 months.
　　During the construction of the steel structure engineering, large-span cantilevered steel beams were extensively used for the roof, with a length of 9 meters and an installation height of 13.1 meters. For the hoisting of large-span cantilevered steel beams, the traditional method is to add supporting jigs for the cantilevered steel beams, which takes a relatively long time. To solve this problem, a construction method of temporarily connecting large-span cantilevered steel beams with splints without supports was adopted. At the same time, new techniques were used to increase the one-time pass rate of welds in the steel structure of the civil construction boarding bridge and improve construction efficiency.
　　It is understood that at present, the main structure of the comprehensive transportation hub of the Changsha Airport Expansion and Renovation Project, the hall of the Terminal 3 project, and the main structures of Concourses B, C, and D have been fully completed; the Maglev T3 Station has completed pre-acceptance work; the main structure of the passenger overnight accommodation building has been partially topped out, reaching 70%, and has successfully entered a new stage of masonry engineering construction.