| 摘要 |
PROBLEM TO BE SOLVED: To provide a renovation method of an existing pipe, which prevents jeopardy to a worker when water rises.SOLUTION: A drain pipe 45 is arranged in an existing pipe 30 to be renovated such that sewage water flowing in the existing pipe is drained. While the sewage water is drained through the drain pipe, a pipe unit 10a is assembled from segments so as to be pulled in the existing pipe. The pulled-in pipe unit is connected to a next pipe unit 10b, and the pipe unit 10b is pulled in the existing pipe. While the sewage water is drained through the drain pipe, the pulling-in of the assembled pipe unit and the subsequent connection of the pipe unit to the rear end of the pulled-in pipe unit are repeated to install a renovated pipe in the existing pipe. |
