R-thread Self Drilling Soil Nails

R51 Self Drilling Soil Nail

It is a kind of hollow anchor bolt, it can be used as dust ejector tube before grouting. It can eliminate dust in the drilling hole. Grout slurry can be erupted out from drill bit, then it can fill surrounding drill hole and stratum fracture. It makes anchor bolt combine with surrounding soil texture, forms concrete column with steel pipe,and then has the effect of reinforcement.