fixing method of hollow rockrock for tunnel construction

摘要

The present invention relates to a method of constructing a hollow rock bolt for tunnel construction, and the injection socket 112 is coupled to the tip of a computer bolt 110 made of a hollow bar having an injection passage 111 formed therein, and the computer bolt 110 A rock bolt assembly step of screwing at least one support tool 123 formed with the support protrusions 125 on the outer periphery of the; When the rock bolt assembly step is completed, the support protrusion piece 125 of the support tool 123 coupled to the computerized bolt 110 by inserting the rock bolt 100 into the drilling hole 1 formed on the tunnel excavation surface is A rock bolt fixing step of blocking the entrance of the perforated hole 1 by engaging the anti-spill 131 on the rear side of the computer bolt 110 to maintain the coupled state by being caught in the inner periphery of the perforated hole 1; When the rock bolt fixing step is completed, the grout material is discharged to the front end of the rock bolt 100 through the injection passage 111 of the computational bolt 110 to fill the grout material from the inside to fill the grout hole grouting. Step and; When the perforated hole grouting step is completed, the grout material filled in the perforated hole 1 is hardened, and the position of the rock bolt 100 can be easily identified by combining the check rod 135 to the main fixing nut 133. Since the construction includes the completion of rock bolt installation, which forms a layer of shotcrete on the excavation surface of the tunnel, the grout material can be easily and sufficiently injected into the fixing end of the rock bolt installed in a vertical state. In addition to allowing the rock bolt to be firmly installed, it has the effect of securing the best support by allowing the initial fixture position to be variable in consideration of the ground characteristics.