Multi-anticorrosion hollow top water grouting anchor rod and construction method thereof

The invention relates to the technical field of anchor rods, in particular to a multi-anti-corrosion hollow top water grouting anchor rod and a construction method thereof.The multi-anti-corrosion hollow top water grouting anchor rod comprises a hollow anchor rod body used for top water grouting and a grouting bag used for filling grouting; the hollow anchor rod body is sequentially sleeved with a grouting bag, a grout stopping plug with the exhausting and pressure stabilizing functions and a sleeve in the direction from the grout inlet end to the grout outlet end, and the two ends of the grout stopping plug with the exhausting and pressure stabilizing functions are connected with the grouting bag and the sleeve respectively. A grouting hole is formed in the grouting bag, and a grouting stop valve capable of closing the grouting hole during top water grouting and opening the grouting hole during filling grouting is arranged at the grouting hole. The anchor rod has the double functions of water jacking groutin