Since the tower crane involved in aerial work, but also a large number of steel structure, combined function is lifting heavy objects, it is most important to prevent accidents construction crane.

 

First, the foundation accident - the foundation is "the foundation of the" tower crane, ground soft, overall collapse of the tower crane collapse accident is the culprit, so if it is found the tower crane foundation subsidence, tilt: should be stopped immediately, and the rotation lock mechanism live, limiting its rotation. Then set the anchor according to the situation, controlling the pitch crane.

 

Second, the crane folding arm - crane into balance arm, lifting arm in two parts, the former is the main part of the crane work, which is the main body to maintain balance of the crane, if we find the phenomenon of folding arm, you should first stop the crane of any action . Then follow the emergency plan, according to the case by welding and other means, the crane structural reinforcement, or connection method to the crane structure coupled with other objects, tipping the crane and accident prevention during the removal process. Followed by 2-3 sets an appropriate amount of tonnage crane, a boom lock, a lock balance arm. A moment in which a balancing role in the demolition of the arm, to prevent sudden changes in forces caused by tipping. Followed by emergency order under the program, the connection of the boom or the balance arm connection member deformed removed, cut by welding, using a crane to remove the arm; and finally the normal demolition of the tower crane dismantling program, the case Welding deformation structure open steam.

 

Third, the crane tipping --① take welding, the connection method, increased torque balance without damaging instability in the forces, control dangerous development. ② selection of an appropriate amount of tonnage cranes crane in accordance with the emergency plan will dismantle, cut deformable member by welding or adjustment.

Fourth, the anchoring system dangerous --① will correspond to the balance arm tower building boom process should be smooth and locked. ② The crane anchoring system reinforcement. ③ To replace the anchoring system components, the first tower to the required height, the re-replacement parts.

 

Fifth, the tower structural deformation, fracture, open solder --① the tower arm balance corresponds to the deformed part, to smooth the process of boom and lock. ② According to the case by welding and other means, the crane structural deformation or fracture, open bond portion reinforcement. ③ drop tower to replace the damaged structures.