| 摘要 |
PURPOSE:To shorten a term of works, by a method wherein the one end of a cut-off sheet is securely attached to a large pipe, the other end is securely located to a small pipe to insert the small pipe into the large pipe, the sheet is driven as the sheet is inserted into a longitudinal split groove in the large pipe end, and mortar is grouted into the small pipe. CONSTITUTION:The one side end part of a cut-off sheet 2 is securly attached to a large pipe 5, and the other side end part of the sheet 2 is securely attached to a small pipe 7. After the large pipe 5 and the sheet 2 having the small pipe 7 are driven into a ground, the small pipe 7 of the following sheet 2 is driven as the small pipe is inserted into the large pipe 5 of the sheet 2 already driven, and is sunk along a longitudinal split groove 4, and a next sheet 2 is driven. After the sheets 2 are repeatedly driven, mortar M is grouted into each small pipe 7 by means of a grout pipe 10. Further, the mortar M is poured between the small pipe 7 and the large pipe 5 through a number of holes 6, and the large pipe and the small pipe 7 are jointed together by means of the mortar M. |
