THE TECHNOLOGY OF BOTTOM AND ANODE GROUNDING REPAIR WITHOUT DISMANTLING THE FLOATNG ROOF OF AST-20000
This article examines the use of technology of repair and bottom anode grounding vertical cylindrical steel tank RVSPK-20000 m3 without dismantling the floating roof during its reconstruction. The main non-trivial task performed this project was to carry out works within the tank in cramped conditions space. To replace the bottom of the tank together with the extended anode bed, at a depth of 0,9 m below the surface, the process is designed corridor free of floating roof racks, as well as technological corridor to move the dismantled materials, soil, new bottom plates in the direction of the installation hole in the wall. Under the proposed wiring floating roof was in the mounting position provided for the construction project of the tank ensuring reinforce with a height of 2,2 m. To meet the challenge of structural strength was built finite element model of the floating roof in the software package ANSYS, allowing it to simulate various embodiments, the mounting loads. The results obtained by the model formed the basis of the design solutions. Using FEM was modeled temporary reinforcing frame proposed construction of which provided a fivefold safety margin – enough for construction and installation works.