Using the duplex sheath tube for the sewage main pipe embedding, you install, junction the tube the application manner

摘要

PROBLEM TO BE SOLVED: To provide a reliable cutoff construction method being safe against an obstacle in a ground by a method wherein a high pressure pipe is penetrated down to a sewage main pipe in a ground and by using an outer sheath pipe and an inner sheath pipe having a tip being curved, erection and penetration are effected. SOLUTION: A high pressure pipe is penetrated from a road 3 in a ground 2 toward a sewage main pipe 1. By using a pneumatic impact pusher, the tip of an outer sheath pipe 4 is vertically penetrated to a sewage main pipe 1 and soil in the pipe is brought into agitated mud soil by injection water through the high pressure pipe and discharges it to a ground. An inner sheath pipe 10 processed in the same curve as that of the sewage main pipe 1 is vertically erected in the outer sheath pipe 4 and a cutoff agent 12 is injected in a gap 14. A mounting pipe inserted in the inner sheath pipe 10 is joined with a hole drilled in the sewage main pipe 1 by a concrete pipe drilling machine and a gap between the inner sheath pipe 10 and the mounting pipe is filled with cement paste, Thereafter, the inner sheath pipe 10 and the outer sheath pipe 4 are pulled off. This constitution effects safe and reliable cutoff and performs accurate joining between the mounting pipe and a drilled hole.