Production manner of tubed concrete manufacture and molding box null for tubed concrete manufacture production

摘要

PURPOSE: To provide a manufacturing method for a cylindrical concrete capable of molding continuous cylindrical concrete, a mold frame employed therefor, and cylindrical concrete items. ;CONSTITUTION: A space 20 where cylindrical concrete is poured is defined by an outer mold frame 14 having an opening in its upper surface and an inner mold frame 16 of cylindrical synthetic resin or the like. Iron bars and the like are disposed ion the space 20, and after pouring concrete therein, the concrete is subjected to curing. As a result, a cylindrical concrete item can be obtained as in a state of the inner mold frame 16 spreading over the inside of the cylindrical concrete.;COPYRIGHT: (C)1994,JPO&Japio