The Largest Diameter Shield Machine of Domestic High-speed Railway Tunnel Begins Excavation

Xinhua News Agency, Beijing, 5 November（Reporter Fan Xi）The reporter learned from China Railway Construction Corporation Limited.，5 days，It is located at the starting wellhead of Tianxiang Avenue Tunnel of Changjiu High-speed Railway in Nanchang High-tech Zone.，With the largest diameter Shield Machine of high-speed railway tunnel in China,——“Hero”The cutter head of Shield Machine rotates slowly， It is constructed and managed by Changjiu Intercity Railway Company.、The Tianxiang Avenue Tunnel constructed by China Railway 14th Bureau Group began to be excavated.。

Changjiu High-speed Railway connects Nanchang City and Jiujiang City in Jiangxi Province.，The line is drawn from Lushan Station of Anjiu High-speed Railway.，South to Nanchang East Station of Chang-Gan High-speed Railway，Total length of main line 137.Seven kilometers，The design speed is 350 kilometers per hour。

According to Xia Xiaoren, commander of Changjiu Command of Changjiu Intercity Railway Company.，Tianxiang Avenue Tunnel is about 6..Four kilometers，It is one of the high-speed railway shield tunnels with the most complex construction environment and geological conditions in China.，It is also the control project of Changjiu High-speed Railway.。The tunnel is a single-hole double-track tunnel.，Wherein the length of the shield section is 4.Four kilometers，Up to 14 dia..8-meter slurry balance shield tunneling machine。

Wang Xing, project shield manager of China Railway 14th Bureau, said.，In view of the key and difficult points of construction，The project team is in the cutter structure.、Tool type、Drive seal、Pressure resistance, corrosion resistance and other aspects of targeted research and design.，Tailor-made“Hero”Shield Machine。The total length of the shield machine is 134 meters.，It weighs about 3700 tons.，It adopts many innovative technologies such as hydraulic wear detection device of cutter head.。

Changjiu High-speed Railway is China's“Eight vertical and eight horizontal”Beijing-Hong Kong, one of the main channels of high-speed railway（Taiwan）An important part of the channel，It is also the key section to open the high-speed railway corridor with a speed of 350 kilometers per hour from north to south in Jiangxi Province.，To strengthen regional economic ties,、Build an integrated transportation system in Changjiu，It is of great significance to promote the high-quality leapfrog development of Jiangxi.。

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