In the entire process of project construction and reinforcement, there are usually various problems. For this different problem, there are various standard parts with different types and specifications. Among them, mechanical anchors and expansion anchors are widely used. To make full use of these two anchor bolts, you must first learn how to distinguish them. Therefore, how to distinguish the difference between the two anchor bolts from the following aspects.
The first is the design difference. The rear expanded bottom mechanical anchor is a mechanical anchor consisting of a waterproof shell, extruder screw, gasket, spring gasket and lock key. The expansion anchor is wrapped in a cylinder, and there is a gap in the cylinder for drilling holes in the wall. When the expansion anchor is inserted into the hole and the anchor is tightened, the annular cylinder is squeezed and expanded. In this way, the anchor bolt is stuck in the hole and has a fixing effect.
The second is the difference in the deep anchoring of steel bars. The reinforcement anchoring depth of the mechanical anchor bolts enlarged on the back should be less than 10d; the depth of the expansion bolts mainly depends on the strength of the concrete and the specifications and models of the expansion bolts.
The third is that their basic principles of force are different. The rear expanded bottom mechanical anchor bolt makes the extruder screw with bright surface bear the stress through the mechanical key locking force. The key of the expansion bolt generates friction and maintains stress according to the extrusion molding effect. It can be seen that due to the difference between the two, they are also applicable to different situations.