Construction method null of shaft drilling rig and

摘要

PURPOSE: To embody excavation work with high efficiency and convenience and position easily a spot to be excavated while minimizing wasteful consumption of energy when excavating a shaft. ;CONSTITUTION: There is provided a scaffold winch 11 which can wind up and send out freely wire 11a where a scaffold 13 is suspendingly connected to the tip of the wire 11a. Jumbo devices 16A and 16B are vertically installed to the lower end of the scaffold 13.;COPYRIGHT: (C)1995,JPO