Eight TERRATEC Earth Pressure Balance TBMs have
successfully completed 20 drives, totalling approximately 18km of running
tunnels, on four major contracts.
Two TERRATEC Earth Pressure Balance (EPB) Tunnel Boring
Machines made a historic double breakthrough on 14th November,
marking the end of tunnelling works on the 58.6km Pink Line (Line 7) on Phase
III of the Delhi Metro project, in India.
Indian contractor J. Kumar Infraprojects Ltd. working with
China Railway Third Group (CRTG) achieved the breakthroughs with TERRATEC’s S25
and S28 Tunnel Boring Machines on Contract CC-24 having completed the final
970m-long running tunnel drives between Vinobapuri and Ashram Stations.
The 6.61m diameter EPB shields feature state-of-the-art
900kw VFD electric driven cutterheads with a versatile configuration of cutting
tools and 17” disc cutters that facilitated excavation through mixed face
conditions of soil and hard rock. Both TBMs also feature active articulation
and two-component grout backfilling systems.
In addition to marking the end of tunnelling works on the
Pink Line (Line 7), the final S25 and S28 breakthroughs also signify the
successful completion of 20 TERRATEC tunnel drives on Phase III of the Delhi
Metro project.
Among its competitors, TERRATEC received the largest number
of new machine orders for Phase III, with eight EPB machines working across
four separate contracts on the project. In addition to supplying the machines,
TERRATEC also provided comprehensive services on site to support the operation
and maintenance of the equipment, assisting the contractors in their
achievements. For further information please visit their website http://terratec.co/ .49/16.
