| 摘要 |
PURPOSE:To eliminate the propagation of vibration in the ground by burying a ferrite molding of a partition wall form in the ground between a seismic center and an object to be protected from earthquake. CONSTITUTION:A ferrite molding 3 of a partition wall form is buried under the ground between a seismic center 1 and an object to be protected from earthquake. The ferrite used is made of fine iron oxide powder a byproduct of steel- making industry, natural magnetite, or even ground ferrite recoveries being widely produced. A mixture of the ferrite moldings and a plastic material has excellent earthquake proofness and also excellent durability under the ground for a long period of time because the chemical change of the ferrite can be prevented by the plastic material. |
