Structure of hollow grouting anchor assembly 
 1, the anchor head: the head of the barb anchor bolt can be located in the drilled hole, and to ensure a good center rod. 
 2, the bolt body: the most important component assembly, the anchor and support play a major role. 
 3, only the pulp plug: in the grouting process to maintain the pressure grouting, the grout into the rock to fully fill the gap. 
 4, Pad: heavier rock stress. 
 5, nut: the stress concentration to the plate on the rock. 
 The main technical performance parameters 
 LH series high strength, light hollow grouting anchor technical performance parameters as follows, if you have special requirements, our company can be redesigned to be met: 
 Specifications LH25 LH27 LH28 LH32 LH38 
 OD (mm) ￠ 25 ￠ 27 ￠ 28 ￠ 32 ￠ 38 
 Tensile strength (Kn) F ≥ 180 F ≥ 200 F ≥ 200 F ≥ 220 F ≥ 350 
 Tooth height (mm) 1.5 ± 0.1 
 Pitch (mm) 12.7 ± 0.1 
 Thread direction of L 
 Standard length 2.0 3.0 3.5 4.0 4.5 (can be customized as needed) 
 Note tensile strength and length can be produced according to customer design requirements 
 Construction Technology 
 1, with the drill diameter and depth of the hole according to the design and clean up the air inside the rubble. 
 2, the anchor head and the rod end into the drilled hole is connected, will anchor the barb head hanging in the hole at the bottom. 
 3, install only the pulp plug, plate, nuts. And tighten the nut. 
 4, the quick end of grouting joints and bolt connections, grouting and grouting joints connecting the other end. 
 Start grouting grouting grouting to be full and the pressure to meet the design value off. Grouting pressure grouting according to design parameters and determine the machine performance, than the reference value of :1:0 Fui Sha-1: 1, water-cement ratio reference value 0.45-0.5: