| 摘要 |
<p>PURPOSE:To perform easy and safe laying of a plurality of new pipes in a state that existing lines are commonly used by a method wherein after the downstream side of each existing line is partially dammed up to fully fill the line, a plurality of the new pipes are orderly inserted in a floated state from the upper stream side of the existing line and the new pipes are fitted in each other for fastening. CONSTITUTION:In laying of lines 10 for renewal in an existing line 1, a manhole 3 is first utilized and a weir 4 to fully fill the line 1 is arranged. In this case, an outflow port 5 is formed in the bottom of the weir 4. An opening part 6 extending from a ground to a line 1 is formed on the upper stream side of the weir 4. An opening part 6 extending from a ground to the line 1 is formed on the upper stream side of the weir 4. A plurality of new pipes 10 are orderly lowered to the line 1 through the opening part 6 and brought into a state to float on sewage 2 by means of floating bodies 7 and simultaneously orderly pulled in by means of a fastening wire 11. In which case, the floating body 7 is formed such that a plurality of floating bags 8 are intercoupled through respective tubes 9. Consecutively, the new pipes 10 are joined with each other and fastened by means of a fastening wire 11. Thereafter, after a piping running from the opening part 6 to the manhole 3 is completed, the weir 4 is removed and the floating bodies 7, simultaneously, are removed.</p> |
