Up shell the prestressed anchor construction process: bolt hole drilling ventilation checks → → → pretightening rod plunger → install only the pulp plug, plate and nut → → tension grouting.

   (1) forming and thoroughly clean hole drilling.

   (2) is attached to the lever body of the anchor head of the rose shell inserted directly into the bottom of the hole, bolt For lengthened available links sets of links.

   (3) forced preload rod to ensure that the top of the anchor head close to the bottom of the hole and left-handed bolt body until tighten, and then install only the pulp plug, plate and nut.

   (4) connected to a conventional tensioning tools (such as torque wrenches, bolt tension meter), the implementation of the the prestressed tension to the specified #118alue.

   (5) grouting. Grouting machine push the scene, take a good the grouting pipe and power; slurry design with stir well, and pour grouting machine; activate the grouting machine, slurry is injected into the anchor hole until the bolt end of outflow of slurry and the grouting pressure reaches the design #118alue; remove the grout joints, cleaning equipment.

    The purpose of grouting is the prestressed anchor body slurry wrapped to prevent the rod corrosion resulting in bolt failure: at the same time, the slurry filling fissures improve the surrounding rock. The grouting must pay attention to quality, to ensure full grouting, supporting a special grouting machine and grouting joints should be used, in order to ensure the effectiveness of the entire prestressed anchorage system. The main purpose is to prevent the corrosion of the rod, as well as filling fissures improve the surrounding rock, taking into account the prestressed bolting and grouting, it proposes to adopt a pure cement grout with good permeability.