Muddy water pressurized small diameter pipe propulsion unit and muddy water pressurized small diameter pipe jacking method

摘要

PROBLEM TO BE SOLVED: To provide a slurry pressure type small aperture pipe propelling device applicable to a small aperture starting shaft and effective in an aquifer sand layer. ;SOLUTION: In a slurry pressure type small aperture pipe propelling device 1 performing propulsion through two processes, a slurry feeding pipe 3 and a slurry discharging pipe can be mutually connected in the axial direction freely removably, a cutter is rotationally driven by means of a hydraulic motor inside an excavator body, and a propelling force from a base pressing device is transmitted to the excavator body via propelling force transmission shafts 5, 6 axially joined to each other. Both end parts of the slurry feeding pipe 3, a slurry discharging pipe 1, and the propelling force transmitting shafts 5, 6 are connected to front and rear connection members integrally, and consequently, a connected body 1 is constructed.;COPYRIGHT: (C)2000,JPO