| 摘要 |
PURPOSE:To improve the strength for the elongation and compression loads applied onto an anchor by setting the depth of the bottom part of the unevenness in the part where the anchor is embedded into a structure body, larger than the crack width generated on the structure body. CONSTITUTION:An anchor 2 is fixed onto a prepared hole 5 formed on a concrete structure body 1 by an adhesive resin 3. A ring-shaped edge cut part 6 having a depth in about 1.5 times of the diameter of the prepared hole 5 is formed, and a ring 7 is fixed at the edge cut part 6. The angle of the screw top 4 of the bolt 2 is within a range of 15-50 deg., and the pitch is set within a range from the equal value to an ordinary screw to the diameter of the bolt. Since, when the pitch is set larger, the effective diameter of the bolt is reduced, and the resistance force reduces, and the number of top parts reduces, and the compression force reduces as a whole, the pitch is desirably set so that unevenness is formed continuously. |
