Causes of wall plate deformation of large storage tank and its repair methods

After the construction of large storage tank, the deformation of tank wall plate is mainly caused by the following reasons except for the deviation caused by the quality of tank wall plate and prefabrication process:
1. Differential settlement of tank foundation.
2. Deformation caused by welding residual stress during construction.

Repair method of tank wall plate deformation:
According to the deformation position and characteristics of tank wall plate, the external reinforcement of tank wall is adopted for correction. The external reinforcement is mainly through the adjustment and reinforcement of the longitudinal back bar. The horizontal back bar is supplemented by adjustment and reinforcement. After the deformed part is corrected and qualified, the back bar and the deformed part of the tank wall plate are welded into one. The deformation repair of the wall plate is completed.