Changchun Metro Project of China State Construction Engineering Co.'s "Changchun No. 1" tunnel boring machine is earth pressure balanced TBM/ Excavation diameter cutterhead is 6440mm. Maximum speed cutterhead is 3.7rpm. Maximum thrust is 4255t. Rated torque is 6000KNm.

Tunnels length of the left tube is 1776.788m. Right tube 1764.25m. Tunnel pass middle weathered sandstone and middle weathered mudstone strata.

http://jl.people.com.cn/BIG5/n2/2021/0626/c349771-34795810.html