METHOD FOR DEMOLISHING REINFORCED CONCRETE BUILDING

PURPOSE:To enhance the efficiency of demolition by embedding force-applying bodies which are flexible hollow bodies in predetermined positions of concrete placed, and providing outside the concrete the nozzle hole of an injection pipe connected to each force-applying body. CONSTITUTION:When the concrete of a concrete building A is placed, long-size force-applying bodies 1 are embedded in the center lines of each beam B and each column C, each of the force-applying bodies 1 being made into a hollow body of spiral cross section from a flexible material, i.e., a thin metal 2. To demolish the building A, the delivery pipe of a hydraulic pump is connected to each nozzle hole to inject high-pressure oil into each force-applying body 1; then each force-applying body 1 is inflated and generates tensile force within the concrete to cut part of the concrete while generating a number of cracks D in each beam B and each column C, thus improving the separability of the concrete from reinforcement and a steel frame. The beams B and the columns C are then exerted with external force using a crusher to separate the concrete from the reinforcement and the steel frame, and the reinforcement and the steel frame are cut apart to demolish the building A.