| 摘要 |
PROBLEM TO BE SOLVED: To provide a joint member of a casing segment used in a micro pile method that has an advantage in improving an efficiency of a process to pull out the casing segment.SOLUTION: A joint member 10 has a cylindrical body part 12 with an outer diameter larger than that of a casing segment. The body part 12 has a connection part 14 and a tooth part 16. The connection part 14, into which an end part of the casing segment is inserted and connected, is formed on an inner peripheral part of the body part 12. The connection part 14 has a female screw 1402 formed on the inner peripheral part of the body part 12. The female screw 1402 can screwed together with a male screw on the end part of the casing segment. The tooth part 16 is formed both ends of the joint member 10 in an axial direction and positioned outside in radial direction of the casing segment connected to the joint member 10, and shoves bored earth away during rotation of the casing segment.SELECTED DRAWING: Figure 1 |
