| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a sound insulation floor structure capable of enhancing sound insulation performance against a floor impact sound by making small the amplitude of vibration that a plurality of cement plate floor materials have on the whole by making large the total rigidity of the plurality of cement plate floor materials.SOLUTION: In a sound insulation floor structure 11 provided with a joining joint filler 16 at a joint 17 between mutually facing side faces 12a of a plurality of cement plate floor materials 12 laid on a beam 14a, a pair of side faces 12a forming the joint 17 and the joining joint filler 16 constitute a position shift preventive structure 24 which prevents one side face 12a from shifting in position vertically from the other side face 12a owing to vibration generated when the cement plate floor materials 12 receive an impact. The position shift preventive structure 24 comprises an upper projection part 25 and a lower projection part 26 provided on the pair of side faces 12a forming the joint 17, and the joining joint filler 16 provided between the upper projection part 25 and lower projection part 26.</p> |
