INVERSELY DRIVEN BEAM CONSTRUCTION METHOD AND FORM AT SIDE OF DRIVEN BEAM

摘要

PURPOSE:To eliminate a work for back filling an outbreak and overhauling a form, and provide a driven beam side form having high durability suitable for an inversely driven beam construction method and allowing easy use by placing levelling concrete to be removed at the time of the next excavation as a form on the lower side of a beam and under a slab, and using a driven beam side form of inorganic fiber mixed cement as a beam side form, regarding an inversely driven construction method. CONSTITUTION:Levelling concretes 3 and 4 are placed under slab on an excavated bottom 2 and on a beam bottom positioned one step lower than the slab, and a driven beam side form 8 having circular longitudinal cross section and formed out of inorganic fiber mixed cement slab is erected between the internal edge of the concrete 3 and the external edge of the concrete 4. Also, after concrete placed on the concrete 3 or 4 shows the required strength, the next excavation work is undertaken and both of the concretes 3 and 4 are removed during the work.