(1) The construction sequence for ordinary cement mortar anchor bolts and hollow grouting anchor bolts differs. The sequence is to first grout after borehole creation before installing the anchor bolts.

(2) For common cement mortar anchor bolts, it is recommended to use threaded steel bars as the anchors. The exposed end of the anchor bolt should be machined to a standard thread of 120 to 150mm and be paired with the corresponding standard nut.

(3) Mortar mix ratio (by weight): cement : sand : water should be 1:1-1.5 : (0.45-0.5), and the sand particle size should not exceed 3mm.

(4) Mortar should be mixed and used immediately. Any mixed mortar should be used before initial setting occurs. Mortar that has already set should not be used.

(5) The single-tube grouting process requires the grouting tube to be inserted 50-100mm from the bottom of the hole. After initiating the grouting, repeatedly push the grouting tube towards the bottom of the hole to expel excess water from the hole with the mortar. Then, slowly and evenly withdraw the tube as the cement mortar is injected. The grouting pressure should not exceed 0.4MPa.

(6) When the grouting process starts or is paused for more than 30 minutes, water should be used to lubricate the grouting tank and its pipelines.

(7) After grout injection, the anchor rod should be promptly inserted. When the rod is inserted to the designed depth, grout should flow out of the hole mouth. If no grout flows out, the rod should be withdrawn and re-grouted. Full-length bonded anchor rods should be fully grouted.