Commencement of steel shell test section of immers

The steel shell test section of the deep and medium channel immersed tube tunnel was started on the 27th, which will provide process parameters for the subsequent large-scale manufacturing of steel shells of 32 pipe sections, and ensure that the manufacturing quality, accuracy and efficiency of steel shell immersed tubes meet the design requirements. The manufacturing period of the steel shell is expected to be 30 months. It is planned to complete the manufacturing of the first steel shell immersed tube at the end of this year and the beginning of next year

Shenzhen China channel is a bridge connecting Shenzhen and Zhongshan in Guangdong Province. It is a world-class cross sea cluster project integrating "bridge, island, tunnel and underwater interconnection". Among them, the two-way eight Lane super wide steel shell concrete immersed tunnel, which is about 6.8 kilometers long and used for the first time in the world, has a certain engineering scale and technical difficulty

as the core construction content of deep and medium channel immersed tube tunnel construction, steel shell manufacturing with Honeywell's unique shield patented technology is not only the first process of immersed tube tunnel construction, but also the basis for all subsequent immersed tube construction projects. It is the key to create immersed tube tunnel quality engineering

the steel shell immersed tunnel of deep and medium channels uses a large amount of steel, and its volume is equivalent to the hull of a medium-sized aircraft carrier; The project has 32 pipe joints, with a total steel consumption of 320000 tons. It is understood that the amount of steel used for the construction of immersed tube tunnels in the Shenzhen China channel is equivalent to the construction of about three North Beijing "bird's nest" that requires frequent replacement of samples

song Shenyou, chief engineer and deputy director of Shenzhen China Channel Management Center, who participated in the whole process of project design, said that at present, the mainland of China still lacks a complete set of technical standards and specifications for recording the number of twists and turns of steel shell concrete immersed tunnels, construction experience, construction period, accuracy and other factors pose a great challenge to the manufacturing capacity of steel shells. In addition, due to the water depth conditions of the channel and the constraints of the dry dock Prefabrication Yard, floating transportation and installation risks are high, The construction of immersed tunnel is very difficult

Shenzhen China channel will be the traffic link and Gateway project of Guangdong Hong Kong Macao Greater Bay area. It will effectively release the heavy pressure of the current traffic road with a distance of 24 kilometers and a high-speed of 20 minutes. It will also support the "backbone" of Guangdong Hong Kong Macao Greater Bay area with the completed Humen Bridge, the Pearl River Huangpu Bridge, the Humen second bridge, Hong Kong Zhuhai Macao Bridge and the Lianhua Mountain River Crossing channel under construction in the future