JACKING METHOD OF BURIED PIPE, AND ATTACHMENT OF JACKING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a jacking method of a buried pipe and an attachment of a jacking device which enable jacking of the buried pipe having less strength like a water collecting pipe in a geological formation having a large water content like a river bed, while enabling easy water-cutoff and assured prevention of face disruption.;SOLUTION: The attachment comprises; a screw 13; a casing 15 housing the screw 13 and transmitting a jacking force from a jacking machine 10 in the axial direction; an auger head 14 arranged at a front end of the screw 13 and provided with a face plate 16 in which discharging ports 20a, 20b leading earth and sand to the screw are formed; and a water stop plate 18. The water stop plate 18 includes a connecting part detachable from the front end of the screw, and opening parts 23a, 23b overlapping the earth and sand discharging ports of the face plate 16. The water stop plate 18 is connected so that it coaxially overlaps the face plate 16 to be rotatable together and is allowed to rotate relatively. By switching over the phase of the face plate 16 and the water stop plate 18, the state of opening/closing of the discharging ports is switched over according to the normal/reverse rotation of the screw 13.;COPYRIGHT: (C)2007,JPO&INPIT