DEVICE FOR LAYING SYNTHETIC RESIN PIPE UNDERGROUND ALONG A CURVE

摘要

Provided is a device for laying synthetic resin pipe underground along a curve that can stably lay pipes along a curve and propel pipes over long distances by using a pipe-jacking method that directly lays synthetic resin pipe underground, and which comprises: polyvinyl chloride pipes (6a, 6b) of a predetermined length that are buried by a tunneling machine that applies a propulsion force using a bottom thrust jack and are connected in a propelling direction; and inner pipes (10) of a predetermined length positioned inside these polyvinyl chloride pipes (6a, 6b) and which transmit the propulsion force to the tunneling machine by being connected in the propelling direction of the tunneling machine. The inner pipes (10) are formed by a pipe body with a space that penetrates in a shaft direction; a coupling section for the inner pipes (10) is provided with a bent coupling section (13) coupled so as to enable bending of the inner pipes (10), a bent section (11) with a rear-end curved surface and a front-end curved surface which transmit the propulsion force, and a propulsion support section (70) that supports the propulsion force of the polyvinyl chloride pipes (6a, 6b) with the inner pipes (10) at intervals within the permitted propulsion force range for the polyvinyl chloride pipes.