| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a construction method capable of new tapping without causing the belch of gas by simple work when renewal is completed or even if it is not clear that renewal is completed. SOLUTION: This construction method is used for newly tapping a duct from a renewal pipe P and characterized in that a clamp means 1 for drilling is installed around the tapping position of the renewal pipe P to isolate the periphery of the drilled part at the tapping position from the outside, both the clamp means 1 for drilling and the renewal pipe P are drilled at the tapping position, a joint member 2 having a flexible joint part 2A at an end part is so inserted into the drilled position as to position the joint part 2A in the renewal pipe P, and the joint part 2A is allowed to abut on and jointed to the periphery of the drilled position of the renewal pipe P.</p> |
