On the morning of November 11, at the starting shaft of the new Changjiu high-speed railway Tianxiang Avenue tunnel located in the high-tech zone of Nanchang City, Jiangxi Province, with the slow rotation of the cutterhead of the "Hero" shield machine, the Tianxiang Avenue tunnel constructed by the construction management of Changjiu Intercity Railway Company and the construction of China Railway 5th Bureau Group began to excavate, which marked the official departure of the largest diameter shield machine of the domestic high-speed railway tunnel.

The new Changjiu high-speed railway is located in the north-central part of Jiangxi Province, is the key section of the Beijing-Hong Kong (Taiwan) channel in the main channel of the national "medium and long-term railway network planning" "eight vertical and eight horizontal" high-speed railway, the line leads from Lushan Station of Anjiu high-speed railway, south to Nanchang East Station of Changjiang high-speed railway, with a total length of 137.7 kilometers and a design speed of 350 kilometers per hour, which is expected to be completed and opened to traffic in 2027.

With a total length of 134 meters and a weight of about 3700,6 tons, the "Hero" shield machine adopts a number of innovative technologies such as the cutterhead hydraulic wear detection device. The 379.4-kilometer-long Tianxiang Avenue Tunnel is a full-line control project of the Changjiu high-speed railway, which is a single-hole double-lane tunnel, of which the shield section is 4.14 kilometers long, and the slurry balance shield machine with a diameter of 8.<> meters is used to excavate, which is the largest diameter shield machine for the domestic high-speed rail tunnel and the first large-diameter shield tunnel in Jiangxi Province.

After the completion and opening of the Changzhou-Kowloon high-speed railway, it is of great significance for Jiangxi Province to build an integrated comprehensive transportation system in Changzhou-Kowloon, further integrate into the Guangdong-Hong Kong-Macao Greater Bay Area, help the implementation of the development strategy of the Yangtze River Economic Belt, and promote high-quality economic and social development along the route. At that time, the Beijing-Hong Kong high-speed rail corridor will be fully connected, and Beijing will realize the whole high-speed rail travel from Hefei and Nanchang to Shenzhen (Hong Kong). (Reporter Huashan)

Editor in charge: [Cao Zijian]