Micro Challenge

摘要

Not to be overshadowed by the large bore tunneling,the East Side CSO project also includes some 7820ft (2.4km) of microtunneling works.With eight specific microtunnel drives in KBB's base contract and also a ninth change order drive,the JV are basically collecting existing outfall flow and bringing it to the main construction shafts,explains KBB's Micro Tunnel Manager,Matt Roberts.At the time of T&TNA's visit the JV had completed four of these drives,including a continuous run of 3055ft (932m)-North America's longest to-date.