| 摘要 |
PURPOSE:To reduce an installation cost and shorten a construction period, by a method wherein a polyethylene sheet is laid over upper surfaces of vibration absorbing rubber and a board such as glass wool, and concrete is placed thereon so that the board is not decreased in thickness over that of the vibration absorbing rubber. CONSTITUTION:After vibration absorbing rubber 3 is laterally and longitudinally aligned in a cavity 2 in a slab 1 being a foundation floor and is adhered to the slab 1, a board 4 such as glass wool is laid over. Thereafter, a polyethylene sheet 5 is laid over the upper surfaces of the vibration absorbing sheet 3 and the board 4, forms 6 are framed, and reinforcing bars are arranged. Concrete 7 is placed in a way that the board 4 is not decreased in thickness over that of the vibration absorbing rubber 3, and the concrete is cured. After the concrete 7 is poured, concrete 8 is further placed thereon to cure it integrally with the concrete 7. This, since the concrete 7 is used as a form bottom plate, eliminates a work to install a trestle on the vibration absorbing rubber 3, resulting in the possibility to reduce a construction cost and a construction period. |
