To provide a tunnel boring machine capable of digging a plurality of cross sections by one device, separating and combining, and excavating a tunnel having a rectangular cross section without making a digging cross section of the tunnel excavator excessively large.
This separation and combination type tunnel excavator is constituted such that three or more tunnel boring machine 20, 30A, 30B as single units having a rectangular cross section are used, at least two tunnel boring machines 30A, 30B are arranged in the vertical direction and are combined with the remaining tunnel boring machine 20, only the tunnel excavators as single units are used and stored inside an outer shell 10 so as to form a rectangular cross sectional shape, and each tunnel excavator can be freely separated and united and move freely in any direction to dig a predetermined rectangular cross sectional shape singly or by connecting a plurality of them.
| JP2004044306 | PROPELLING MACHINE AND PIPE JACKING METHOD |
| JP3690855 | TUNNEL EXCAVATION METHOD |
| JP4037420 | Roadheader |
TAKAGI OSAMU
TAKAMIZAWA KAZUO
KADOHIRA JIRO
