The first double track long tunnel in Guangdong section of Jiangxi Shenzhen high speed railway runs through

China Youth Daily, Beijing, Jan. 7 (Zhu Guocai, Zhou Jiahua, China Youth Daily, Zhou Wei, China Youth Network reporter) Yihe tunnel, the first double track long tunnel in the Guangdong section of Jiangxi Shenzhen high speed railway, was fully opened yesterday, laying a solid foundation for the opening of Jiangxi Shenzhen high speed Railway in 2021. Li Ming, director of No.1 section of Jiangxi Shenzhen high speed railway of China Railway 16th Bureau Group, the contractor of

Yihe tunnel, said that the tunnel is located in the mountains of Dongyuan County, Heyuan City, Guangdong Province, with a total length of 6043m, and is the "throat" project of Jiangxi Shenzhen high speed railway. "The stability of the surrounding rock of the whole tunnel is extremely poor, from completely weathered to weakly weathered granite, with complex geology, and the tunnel body passes through 8 major fault zones Construction is very difficult. We have successively adopted the self-propelled hydraulic inverted arch trestle, semi-automatic cloth hanging trolley, wet spraying manipulator and other advanced equipment, as well as the secondary lining window entry molding technology, hydraulic blasting and other advanced technologies. Five technologies, such as anti-interference mobile layered concrete formwork, have also obtained the utility model patent issued by the State Intellectual Property Office, and have been popularized and applied in the same industry nationwide. "

it is understood that the Jiangxi Shenzhen high speed railway is the main link of the south section of Beijing Jiulong high speed railway and an important part of China's "eight vertical and eight horizontal" high speed railway network.