| 摘要 |
PROBLEM TO BE SOLVED: To provide a rock bolt which is for use as a reinforcing member in the ground such as the natural ground or a rock mass, and contributes to quick and easy anchoring thereof to the natural ground, to thereby exhibit excellent working efficiency and construction efficiency, and to provide a timbering construction method using the rock bolt. SOLUTION: The rock bolt has a diameter-reduced cylinder portion 4, a connection portion 6, and an operating portion 8. The diameter-reduced cylinder portion 4 is formed of a cylinder body having a radially reduced diameter and both blocked ends, and a high-pressure medium injection hole is formed in a rear edge of the cylinder body, for radially inflating the cylinder body. The connection portion 6 is formed of a sleeve portion 12 attached to a front end of the diameter-reduced cylinder portion, and a male screw portion 14 formed at a front portion of the sleeve portion and having a spiral groove formed in a surface thereof. The operating portion 8 is formed of a male screw portion 16 attached to a rear end of the diameter-reduced cylinder portion and having a spiral groove formed in a surface thereof, and an injection cylinder portion 20 formed on a rear side of the male screw portion in one body therewith and having an injection port 18 that communicates with the injection hole. COPYRIGHT: (C)2006,JPO&NCIPI
|
