| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an embedded pipe reconstruction method for enabling efficient reconstruction of an existing concrete pipe 3 with steel joint rings while stabilizing the existing concrete pipe to be reconstructed and a natural ground. <P>SOLUTION: The embedded pipe reconstruction method comprises: a step of excavating a start shaft 1 and an arrival shaft 2 in a starting end position and a terminal end position of the existing concrete pipe 3 embedded in a ground; a step of disposing a boring machine 6 with a cutter head in the start shaft; a steel joint ring removing step of removing steel joint rings 5 from the existing concrete pipe on the start shaft side first; a steel joint ring removing site cavity protecting step and an earth retaining material filling and solidifying step of filling and solidifying a natural ground protecting material 30 in a site where the steel joint rings are removed; an existing concrete pipe crushing and removing step of starting the boring machine for sequentially crushing and removing the existing concrete pipe from which the steel joint rings are removed and in which the natural ground protecting material is filled; and a new pipe driving and embedding step of driving and embedding a new pipe 4 in proportion to the advance of the existing concrete pipe crushing and removing step. <P>COPYRIGHT: (C)2013,JPO&INPIT |
