Shield construction work has recently been extended from cities to mountainous regions with the expanshion of the sphere of peoples activities,so shield machine capable of handling various complex soil such as alluvium and rock is needed. To meet this demand, KOMATSU has combined shield machine with TBM (tunnel boring machine for rock)technologies to produce a hybrid shield (rock correspondence shield)machine.This permits only one machine to excavate in these complex soils, where shield machines have been used conventionally for alluvial soil.Contact us for more details.