| 摘要 |
The present invention relates to a rock bolt. The rock bolt in the present invention, which has a hollow body (100) having an injection hole for mortar injection and a discharge hole and has a fixing force through mortar curing when inserted into a bored groove (H) under the ground, includes: a plurality of drawing support pieces (200) formed along the outer peripheral surface of the body (100) in the lengthwise direction of the body (100), each drawing support piece having a front fixed portion (220) fixed to the body (100) and a drawing portion (240) gradually enlarged from the front fixed portion (220) to the rear side thereof in the inner and outer diameters thereof; and a plurality of mortar guide holes (300) punched along the peripheral surface of the body (100) hidden by the drawing portion (240). According to the present invention, when the rock bolt is inserted into the groove under the ground, it can be rapidly and easily inserted through the drawing portions of the drawing support pieces, and further, when the mortar is poured, it can be rapidly and stably filled a space between the groove and the body through the mortar guide holes and the drawing portions. Furthermore, the drawing force after the mortar curing can be optimized through the wedges of the drawing support piece. |
