Because the special inverted cone chemical anchor bolt is fixed with chemical adhesive, it needs a period of time to set, especially in the low temperature environment in winter, the setting time will be longer, thus prolonging the construction period. However, the enlarged mechanical anchor bolt at the bottom can be installed without waiting. Moreover, the construction time has nothing to do with the temperature environment, so the construction period will be much faster.

Other special inverted cone chemical anchor bolts are fixed by chemical bonding. The mechanical locking key principle is used to anchor lock the mechanical anchor bolt with reamed bottom. Generally, chemical adhesive is used in the market for special inverted cone chemical anchor bolt. The melting point is relatively low cannot be welded. The special inverted cone chemical anchor bolt can withstand high low temperature can be welded; The mechanical anchor bolt at the rear enlarged bottom is made of metal material, which has strong high temperature resistance weldability, so it is more flexible.

The special inverted cone chemical bolt has lower seismic performance than the mechanical bolt with enlarged bottom. When encountering earthquake irregular load similar to earthquake, the anchoring force of post expanding mechanical anchor bolt with mechanical locking effect will suddenly fail; when it exceeds the seismic fortification strength, it will provide people with the opportunity to escape avoid secondary disasters. After a big earthquake, it can be repaired continued to be used. Therefore, the point of view of seismic force, the mechanical anchor bolt with rear bottom expansion is also preferred