THREE-THROW SHIELD EXCAVATOR

摘要

PURPOSE:To use the usual segments alone for even lining work due to stress advantages at low cost by a method in which a three-throw shield excavator whose tunnel forming function can be altered to lateral three throw or vertical three throw type is used. CONSTITUTION:A shield excavator 2 whose front and rear parts are integrated is combined with shield excavators 3 and 4 whose front cylinders 3a and 4a are bendable to the rear cylinders 3b and 4b. Or two shield excavators 2 are combined with two excavators 3 and 4 in parallel.