Fundamental retrofitting construction method null of storage

摘要

PURPOSE: To improve the efficiency and accuracy of a remodeling construction method by eliminating the need for the removal and carrying-in works of a bottom plate and reducing various works such as cutting, welding, welding inspection or the like by cutting, lifting and supporting the bottom plate on the inside of a concrete ring. CONSTITUTION: A section in the vicinity of the inside of a concrete ring 3 of a bottom plate 5 is cut cylindrically, the cut bottom plates 15 are lifted by a crane 13, vedette scaffolds 17 are constructed on the top face of a foundation ground 16, the ground 16 is removed and discharged by a vacuum pump 18 or the like, and the scaffolds 17 are extended successively to the removed sections. Concrete 20 is poured by a concrete pump or the like and the extended scaffolds 17 are left in places, the scaffolds 17 are removed after the completion of pouring, asphalt sand or the like 6 is spread all over the top face of concrete 20 as the bottom plates 15 are left as they are brought to a lifted state, the crane 13 is released gradually, the bottom plates 15 are hung down on the concrete foundation 20, and the bottom plates 5 and the bottom plates 15 are welded.