TERRATEC TBM TO TACKLE TOUGH TAIWAN TERRAIN

摘要

Australia-based TBM-maker Terratec has supplied a 6.24m-diameter EPB TBM (EPBM) to BES-Daiho-Okumara JV to excavate its underground works contract on Taoyuan City's MRT Green Line Contract GC02. One of Taoyuan Metro's six rapid transit lines, the Green Line will have 21 stations (10 underground) and a total length of 27.8km. Contract GC02 includes four underground stations with two tunnel drives of 5.4km. The EPBM's initial drive will be for around 80m from Mayuan station to Da'nan station. The machine is equipped with a spoke-type cutterhead with outer rings designed to work effectively in the expected sandy gravel, sandstone and mudstone geology at pressures of up to 2.5bar. It is able to smoothly discharge large boulders through the ribbon-type screw conveyor. As it progresses, the EPBM will install 1,200mm-wide reinforced concrete lining rings comprising five segments plus key. Muck cars will be used.