ROCK ANCHOR CONSTRUCTION METHOD AND ROCK ANCHOR

摘要

PURPOSE: To form an anchor head in specified size simply by a grout material press-fitted to a rock anchor such as a rock bolt while reinforcing the ground and a bedrock in the periphery of the anchor head, and increase pull-out resistance by improving adhesion with the periphery of the anchor head. ;CONSTITUTION: The impregnating hole 8 of a grout material is penetrated longitudinally into an inserting hole 2 bored to the ground and a bedrock, a rock anchor body 1, to which a bag body 3 for forming an anchor head communicated with the impregnating hole is annexed, is inserted, and the grout material is press-fitted from the impregnating hole, thus expanding the bag body. The grout material is flowed out to a periphery through the pores of the bag body, thus forming a diameter-expanding grout lump for the anchor head to a rock anchor body while reinforcing the periphery of the diameter-expanding grout lump.;COPYRIGHT: (C)1994,JPO&Japio