Two CREG Gripper TBMs are now in boring on Greater Beirut Water Supply Tunnel job site, which has been planned to complete the works at end of 2018.
Since beginning two TBMs have showed a good performance. The recorded best daily and weekly boring rate are respectively 72.65m and 235.57m.
It is estimated that the TBMs will be available for re-sale around May 2018.
|Boring diameter||3500 m|
|Total length||240 m|
|Total drive power||1200 kw|
|Max. advance speed||80 mm/min|
|Thrust force||8972 kN|
|Breakout torque||1800 kN∙m|
|Rotation speed||0-8.5-14.5 rpm|
|Min. horizontal radius||300 m|