The purpose of the post expanding bottom anchor bolt the self expanding bottom anchor bolt are very similar, but there are certain differences in the standard usage practical construction.

The application method is quite different: Although the mechanical function of the two is similar, the distance in the equipment method is very large. The equipment method of post reaming anchor bolt is messy. After drilling straight hole, it is required to expand the hole separately, the special reaming bit is required. Taking the M12 rear belled anchor bolt as an example, its reaming size reaches M24, it is relatively simple to touch the reinforcement when the equipment is used. On the one hand, there is no need to expand the hole alone to save a lot of working hours, on the other hand, it can be equipped with electric hammer to equipment, which is very labor-saving.

There are some differences in the specifications on sale: when we talk about the rear belled anchor bolt equipment, we simply encounter the problem of reinforcement, which leads to the fact that the specification of the rear belled anchor bolt has great limitations, which is also the primary reason why it is difficult to find the rear belled anchor bolt in M20 above specifications in the market. As for the self expanding bottom anchor bolt, there is no single reaming, so the probability of it hitting the reinforcement is relatively small. As a result, the specifications for self expanding bottom anchors can even reach M20. However, in the use of large-scale anchor bolts, it is necessary to understand the arrangement of reinforcement in concrete first, so as to make a reasonable drilling plan.

The safety function of the two: first, discuss the different methods of self expanding bottom anchor bolt on the market, which are mainly divided into two kinds, one is the self expanding bottom anchor bolt with diamond cutter head, the other is the anchor bolt reaming hole by adjusting the withdrawal height, slope sleeve blocking method. The first kind has better reaming effect than the second one, but it is expensive, so it is inevitable to waste the one-time use of diamond bit. The second type of anchor bolt with self expanding bottom by mechanical organization can only partially cut the concrete during the equipment, which can achieve the effect of the former one, but the construction is simple.

Although it is more complicated to pull out the anchor bolt directly after the anchor bolt is pulled out, it will be able to pull out the anchor bolt directly after the construction. The tensile force of small specifications such as M12's rear belled anchor bolt self expanding bottom anchor bolt is very close, but when the specification is large, there is some distance between their mechanical functions. However, the actual requirement of anchor bolt of M12 can account for more than 60%.

The difference between expansion anchor bolt expansion anchor bolt: expansion anchor bolt is a kind of mechanical anchor bolt which forms corresponding anchoring effect through special mechanical structure friction force of concrete hole wall after the equipment is in place, which represents anchor bolt including anchor bolt, forced anchor bolt, etc. The force effect of the expansion anchor bolt will be different due to the type of anchor bolt, the distance is large, but it is difficult for the bottom to reach the level of the rear expanding anchor bolt the self expanding bottom anchor bolt. We'd better understand the difference between the expanded bottom anchor bolt the expansion anchor bolt before we can judge which anchor should be used in the construction.

Some project construction personnel do know the bottom expansion anchor bolt, often mistakenly use the expanded bottom anchor bolt as the expansion anchor bolt, which is really dangerous. Before construction, it is hoped that all manufacturers can also provide corresponding skill disclosure when selling products, so that construction personnel can understand the application method of products the importance of curtain wall engineering safety.