Cross Passage Construction with CREG TBMs — TBM: Tunnel Business Magazine

Schematic diagram of a cross passage TBM

Capable of launch, excavation, muck discharge, support, erection and receiving, CREG cross passage TBMs, including shield machine type and pipe jacking machine type, can excavate cross passages with different lengths and curve radiuses in main tunnels with different diameters. They are mainly used for soft ground, such as clay, mud, silty clay and silt.

Technical features

CREG cross passage TBMs are featured with four technological innovations.

Typical cases

Compared with the conventional mining method, the cross passage TBMs have been improved in construction safety and quality, and its efficiency is more than four times of the conventional mining method. At present, they have been successfully applied in more than 10 projects, including Ningbo Rail Transit Line 3, Wuxi Metro Line 3, and Australia West Gate Tunnel, and have excavated more than 100 cross passages.

On Dec. 29, 2017, it was the first time to use a cross passage TBM (shield machine type) to excavate the metro cross passage in China. It took 18 days to break through the 17m long cross passage. After completion, the cross passage had a good quality with no water leakage phenomenon.

On Dec. 10, 2018, it was the first time to use a cross passage TBM (pipe jacking machine type) to excavate the metro cross passage in China. It took 16 days to break through the 14m long cross passage.

On Oct. 19, 2019, with 10.8m clear spacing, the cross passage TBM was launched and it took 17 days to break through. This project is the first submarine cross passage constructed by mechanized method in China.

On Feb. 11, 2022, the cross passage TBM was launched and it took 12 days to break through. This project is the first cross passages excavated by the first dual mode cross passage TBM (pipe jacking machine type) in China, which overcame the construction difficulties of tunneling in large overburden and high water pressure stratum.

RELATED: CREG Φ14.29m Dual Mode TBM Ready for Guifeng Mountain Tunnel

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