Before the installation of steel structure engineering construction, there are often some problems in the foundation parts. It is not common for the foundation bolts to be damaged. However, recently, some customers have asked about how to repair the damaged foundation bolts. Today, the 3D steel structure editor will analyze the causes and preventive measures of the anchor bolts,

 We all know that the thread damage of the foundation bolt of steel structure, and the failure to rotate the nut and fasten the column in the steel structure engineering construction will directly affect the transmission and stability of the structural force, and there will be unstable factors for the overall quality of the steel structure engineering construction. 

1、 The main reasons for the damage of anchor bolt thread of steel structure are as follows: 　　

 　　1.The anchor bolts are seriously rusted due to impact or improper storage during transportation, loading and unpacking.　　

 　　2.Or the bolt is not protected after embedding, and the outer step is damaged. 　　

 　　3.The bolt was used as the conductive zero line of electric welding on site, and the thread was damaged by electric arc. 　　

 　　4.The bolt is used as the binding point of traction rope tension.　　

 The upper part introduces the causes of the damage of the anchor bolts of the steel structure. At the bottom, how to prevent this kind of situation from happening?

 2、 Methods and measures to prevent thread damage of anchor bolt in steel structure　　

 (1) When the anchor bolts are transported, packed and unpacked, the thread protection shall be strengthened. After being smeared with industrial vaseline oil, it shall be wrapped and bound with plastic film to prevent thread damage and corrosion.They should be stored separately and should not be mixed with other parts or components to avoid damaging the thread due to mutual impact. 　　

 (2) After the anchor bolt is embedded, it shall not be used as the fulcrum for bending processing, as the neutral line of electric welding machine, or the binding point of traction force.When hoisting components, proper operation shall be carried out to prevent the thread from being damaged by horizontal lateral impact force. 

(3) The bolt thread has been damaged, the following treatment methods can be taken: when the damaged length of the thread does not exceed its effective length, the steel file can be used to trim the thread until the nut is smoothly screwed in.When the damaged length of the local foot bolt thread exceeds the effective length specified, the length of the original thread can be cut by gas cutting; one end of the thread is processed into a thread with the same material and specification as the original bolt, and a 30 ° – 45 ° groove is made at the end section of the butt joint. After butt welding with the lower end, the steel sleeve with the corresponding diameter, specification and length is sheathed into the jointWelding reinforcement is carried out.After casing reinforcement, the diameter of bolt will be larger than the hole diameter of base plate, so the diameter of column base plate can be enlarged appropriately. 　　

 Conclusion: the foundation bolt of steel structure is the foundation part of steel structure. We all know that if the foundation parts have problems, it means failure for the whole steel structure project!Therefore, no matter in the process of production, processing and transportation, the basic parts of these steel structures must be well protected!