Rehabilitating pipe segment and existing pipe rehabilitation method using same

Abstract

A rehabilitating pipe segment comprises first and second segment halves linked together to provide a variable-width segment. The first segment half has an internal surface plate, a convex plate extending parallel to the internal surface plate, and a side plate extending perpendicular to the internal surface plate. The second segment half has an internal surface plate, an internal plate extending parallel to the internal surface plate and forming a concavity, and a side plate extending perpendicular to the internal surface plate. The convex plate and a braking rubber are fitted into the concavity to link the first and second segment halves together to provide the variable-width segment. When tension of a specified amount or greater acts on the variable-width segment, the first and second segment halves move relative to each other in the pipe length direction against the braking force of the braking rubber.

What is claimed is: 
     
         1 . An existing pipe rehabilitation method for rehabilitating an existing pipe by linking segments in the circumferential and pipe length directions to assemble a rehabilitating pipe inside the existing pipe, the segments each including an internal surface plate, side plates that are erected vertically at both sides extending in the circumferential direction of the internal surface plate, and a plurality of internal plates that are erected on the top surface of the internal surface plate, and the segments being linked in the pipe length direction by the following steps:
 securing a plurality of nuts along the circumferential direction to the internal plate of each segment that lies in a position nearest to the side plate thereof;   preparing a fastening member that can be screwed into the nut;   abutting first and second segments and screwing the fastening member into the nut to fasten the first and second segments for linkage in the pipe length direction thereof; and   sequentially liking the segments to the linked segments by the fastening member.   
     
     
         2 . An existing pipe rehabilitation method according to  claim 1 , wherein the fastening member is screwed from the internal plate of the first segment into the nut secured to the second segment, thereby bringing the other end of the fastening member on the side opposite to the nut into pressing contact with the internal plate so as to fasten the first and second segments in the pipe length direction. 
     
     
         3 . An existing pipe rehabilitation method according to  claim 2 , wherein the internal plate with which the fastening member makes pressing contact is the internal plate furthest from the nut into which the fastening member is screwed. 
     
     
         4 . An existing pipe rehabilitation method according to  claim 1 , wherein the nut extends in the pipe length direction so long as to protrude to the exterior of the side plate of the second segment in a state in which the nut is secured to the internal plate thereof, and the protruding distance is equal to or greater than the thickness of the side plate of the first segment to which the second segment is linked. 
     
     
         5 . An existing pipe rehabilitation method according to  claim 1 , wherein the nut position in the segment is offset as viewed in the circumferential direction from the nut position of the adjacent segments. 
     
     
         6 . An existing pipe rehabilitation method according to  claim 1 , wherein the fastening member is a screw member having at one end a screw part that is screwed into the nut secured to the segment, and at the other end a screw part on which another nut is mounted. 
     
     
         7 . An existing pipe rehabilitation method according to  claim 1 , wherein the fastening member is a bolt.