| 摘要 |
<p>PROBLEM TO BE SOLVED: To eliminate a problem of a three-division type liner, to facilitate the adjustment when installing the liner, to remove the liner after laying an aseismatic pipe with a propulsion pipe construction method without generating a peel of the inner surface lining layer, and to enable the quick recycle of the liner after the removal thereof without scattering the liner inside of the pipe. SOLUTION: A block body 2 having a square cross section and to be interposed between a tip of an insertion port 1a and a depth of a receiver port 1b of a propulsion pipe 1 is divided into two in the axial direction of the propulsion pipe. An axial directional cross section of one divided piece 21 is formed into a right angled trapezoidal shape having a long side 21a at the pipe inner surface side and a short side 21b at the tube outer surface side. The other divided piece 22 is brought in contact with an inclined side 21d of the divided piece 21, and formed into an inverted trapezoidal shape having a square cross section over the whole. A support bracket 5 to be expanded toward the other piece 22 is fitted to the long side 21a of the divided piece 21, and a support shaft 6 stood in the other piece 22 at the center of the pipe is inserted into the support bracket 5, and an elastic member 7 is interposed between a tip 6a of the support shaft and the support bracket 5 so as to energize them for opening.</p> |
