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How to do rebar planting well?

The construction process of construction engineering is divided into nine parts: Positioning → drilling → hole cleaning → reinforcement treatment → anchorage adhesive preparation → reinforcement planting → curing and protection → inspection Our workers drill holes at the required anchoring depth when drilling, and the hole diameter shall ensure that the reinforcement gap on each side is greater than 2mm. Then the workers clean the hole with air pump, and the hole is clean and free of dust. The amount of adhesive for rebar planting shall ensure that the hole is full and the rebar is screwed in until there is a little colloid overflow at the hole. After the consolidation of the rebar planting adhesive, the workers shall carry out the on-site pull-out test. The next step can only be carried out after passing the test. 1、 Positioning We first marked the drilling position and model according to the design requirements. If there are load-bearing reinforcement on the base material, the drilling position can be adjusted appropriately, but it should be planted inside the distribution reinforcement of the shear wall. The anti-skid hole shall be drilled, and the small hole shall be drilled with a chisel at the mark point of planting reinforcement to prevent the drill bit from sliding and dislocation during drilling. 2、 Drilling The drilling type is percussion drilling. First of all, the drill hole shall be perpendicular to the plane of the concrete member, with a slope of no more than 8 degrees (except for being too close to the floor without operating space or special requirements), and the drilling depth is 15d (d is the diameter of the reinforcement). The drilling progress should not be too fast, so as to prevent the heat of the drilling head from affecting the concrete strength around the drilling. When we drill holes, if the main reinforcement or stirrup in the original structure needs to be displaced and avoided, it can be displaced only after verification. 3、 Hole cleaning When removing the dust in the hole, it is necessary to clean the dust frequently during the drilling process. If there is ash residue in the hole, especially when drilling downward, the ash residue is not easy to run out. Otherwise, the drilling rig and drill bit will be burnt. At this time, workers can use blowers for high-pressure flushing during hole cleaning. After drilling, check the hole depth and hole diameter, blow out the dust in the hole with compressed air, then brush the hole wall with a brush, and blow the hole again with compressed air, which should be repeated for 3-5 times until there is no dust and debris in the hole. Before filling, the hole wall should be free of dust, oil and organic impurities.