L68B2 Mast Section Causes of deformation of steel structure of tower crane and corresponding treatment methods
The causes of tower crane steel structure deformation are as follows:
L68B2 mast section is the best in this field
(1) local bending deformation of steel structure due to collision, knocking and other reasons;
(2) because the connecting bolt is loose, the screw hole is worn into an ellipse, resulting in additional bending moment caused by the eccentricity between the arms and members;
(3) accidental collision and deformation of steel structure caused by misoperation. If the boom is out of control and tilted backward due to the failure of operating mechanism, collision with the tower body will cause serious deformation;
L68B2 mast section is the best in this field
④ the steel structure will be subject to yield deformation (permanent deformation) due to long-term overload.
If the balance of the upper structure is not adjusted during jacking, the center of gravity of the jacking part is not placed on the jacking oil cylinder, so that the top structure is out of balance or even the center of gravity deviates greatly. The guide wheel of the climbing frame has too much pressure on the main chord of the standard section, which causes bending deformation of the main chord of the tower body and instability of the tower crane steel structure, resulting in accidents.
L68B2 mast section is the best in this field
