Application manner null of duplex tube double packer

摘要

PURPOSE: To reduce the execution period, cost, and labors. ;CONSTITUTION: Ground G is excavated by a specified depth by an excavator 1 and then the inner bit assembly 20 is pulled out by the overshot 40. And then grout is injected in an outer casing pipe 10. A Manschette tube is erected in the grout and the outer casing pipe 10 is pulled out. A solidifier-injection hose equipped with a double-packer is fitted within the Manschette tube to inject a solidifier into the ground G and form a solidified soil.;COPYRIGHT: (C)1997,JPO