Chengdu Metro Lines
CREG have supplied 30 TBM’s for excavation and extension work in five different metro lines in Chengdu over the last 2 – 3 years.
These machines have achieved up to 18 rings per day, tunnelling through sand and gravel conditions.
Basic information on these machines is….
|Location||Chengdu Metro Lines 1, 2, 3, 4 & 7|
|Geology||Cobbles, sand and gravel|
|No. of TBM||30|
|Outer TBM Diameter||6.28 m|
|Length, incl. Backup||84 m|
|Cutterhead Power||945 kW Hydraulic Drive|
|Typical Progress Rate||12 rings/day|
|Max. Progress Rate||18 rings/day|
|Max. Drive Length||1.49 km|
|Comments||Max settlement = 3.7mm|
|Best monthly rate - m||345|