PIPE CHANNEL REVISING AND INCREASING METHOD WITHOUT OPENCUT FOR UNDERGROUND BURIED PIPE

摘要

PURPOSE:To make the revision and increase of a buried pipe easy and to improve the reliability of construction, by previously penetrating small diameter rod pipes in an under ground buried pipe before breaking process of the pipe, and breaking the pipe like a slit using the rod pipe as a guide. CONSTITUTION:Rod pipes 20 are inserted in an under ground buried pipe 21 being jointed successively from a starting shaft 17 to a reaching shaft 18 with a base pushing unit 19. Then in the shaft 18, a buried pipe breaking and new construction pipe pulling device 22 is attached to the tip of the rod pipe 20, and thereafter the base pushing unit 19 is operated reversely to the inserting direction of the rod pipe 20 to pull back the device 22 toward the shaft 17, and at the same time the buried pipe 21 is broken like a slit. And according to the progress of pipe breaking, new rod pipes 20a and pilot pipes 23 are successively connected to the rear end of the device 22 to carry out the revision of buried pipe channels or increasing construction of pipe channels in the vicinity of buried pipe channels. Thereby the base pushing unit can be made compact to improve the economical characteristics, and the modification of the angle of torsion can be made easy, and the constructional pollution and the traffic interference or the like can be a avoided.