Reserved hole method: First clean the hole and put the anchor bolt into the hole. After the positioning and alignment of the equipment, the non-shrinkage fine stone concrete which is one level higher than the original foundation is used for watering and tamping. The distance between the center of the anchor bolt and the edge of the foundation should not be less than 2d (d is the diameter of the anchor bolt), and should not be less than 15mm (d≤20 should not be less than 10mm), and not less than half of the width of the anchor plate plus 50mm. When the above requirements cannot be met, appropriate measures should be taken to strengthen them. The diameter of anchor bolts for structure should not be less than 20mm. When subjected to seismic action, double nuts should be used for fixing, or other effective measures to prevent loosening, but the anchor bolt length should be 5d longer than the anchor length of non-seismic action.
