Chongtai (Chongming-Taicang) Yangtze River Tunnel of Shanghai-Chongqing-Chengdu high-speed Railway

11.325km-Long Single-heading Excavation

The total length of the Chongtai Yangtze River Tunnel is 13,201 m. It mainly passes through silt, silty clay, muddy soil and sand layers. The horizontal alignment includes three curve sections, and the vertical alignment includes five curve sections, with radii of 4,000m, 8,000m and 10,000m. A "V-shaped" longitudinal profile is adopted, with a maximum gradient of 25%. At its lowest point,the tunnel overburden is approximately 74.5m. The max. water and earth pressure reaches 9.6 bar.

This TBM is recognized within the industry as a "four-aside TBM" and achieves an intelligent tunneling mode of "manned supervision with unmanned operation."

Project Background

The commencement of construction on the Shanghai-Nanjing section is of great significance for supporting the national strategy of the Yangtze River Economic Belt, optimizing the spatial layout of the Yangtze River Delta, and accelerating the integration of Shanghai, Jiangsu and Anhui.

right side

Chongtai Yangtze River Tunnel Route

TBM Factory Acceptance Test