Natural ground pressing in construction method and curing agent pressing in device null of

摘要

PURPOSE: To improve safety of work by forcing hardener effectively into the ground surrounding an excavated section of a tunnel and the like to reinforce a soft ground. ;CONSTITUTION: By boring an injection bore 3, while high pressure water is being blown from a nozzle 23 at the forward end of a rod 18, the ground 1 surrounding the bore 3 is made looser. And thereafter an injection pipe 30 covered with a hose 39 is inserted into the bore 3 and a hardener is filled into the bore 3, following which pressure fluid is supplied into between the pipe 30 and the hose 39 to expand the hose 39, so that the hardener is forced into the ground 1 to form a reinforced pile P.;COPYRIGHT: (C)1993,JPO&Japio