| 摘要 |
PROBLEM TO BE SOLVED: To shorten the construction period and reduce the costs. SOLUTION: A buried object searching device 16 equipped with a plurality of searching rods is installed on a boring machine 14, and excavation is performed in such a condition that a high pressure water is spouted from the searching rods, and the position of a sewer main pipe 10 is checked while existence of any buried object is being sought-1-. Eventual dislocation from the sewer main pipe is determined from difference between the rod inserting depths-2-, an outer pipe 54 is mounted on the boring machine 14 and the boring operation is executed. When the outer pipe 54 reaches the sewer main pipe 10, a rubber and leaf spring 56 held by the outer pipe 54 is pushed out so as to make the water stop between the outer pipe 54 and sewer main pipe 10-3-. Then the earth is exhausted from the outer pipe 54, and a boring device 80 for buries pipe is mounted on the boring machine 14-4-, followed by boring of a connection hole for a mounting pipe to be connected to the sewer main pipe 10, and then the mounting pipe is connected. |
