Continuing the continual tunnelling machine and its continual digging Shank mannered null shaft

摘要

PROBLEM TO BE SOLVED: To provide a shield boring machine capable of making adits in multiple opposite directions when boring vertical shafts and adits continuously. ;SOLUTION: In a shield boring machine driving continuously from a vertical shaft to an adit, a spherical body 3 housing a child shield machine 2 inside a parent shield boring machine 1 is installed in a freely rotatable manner, a plurality of starting openings 4 through which a child boring machine 2 can pass through the installed at the side surface of the parent shield boring machine 1, one side surface of the spherical body 3 is made by cut and cover method, a lid 6, is installed, which is made of a high strength cutting material and can be cut, having a pressure withstanding strength with the shape as same as that the cut and cover portion, and carry-in entrance 7, with which other side surface of the spherical body 3 can be made by cut and cover method, is provided.;COPYRIGHT: (C)2000,JPO