Effect on The Ground Vibration Isolation by The EPS Composition Isolation Wall and The Proposal of That Appraisal Method

摘要

It is examined about the new ground vibration isolation wall to cope with the spread route in the ground vibration problem by this thesis. In other words, a full-size composition isolation wall laid about the composition isolation wall of EPS (Expanded Poly Styrene) and concrete in actual field. Excitation experiment which the vibration which occurred in vehicles running and so on was presumed was enforced, and effect on a decrease in vibration by this composition isolation wall was observed. As for the of replay frequency of vibration at the nearby low stage as well, the effect of 3-6dB was confirmed 3Hz as that result. And, as for the range that the influence of the diffraction from the end part of the isolation wall wasn't taken, it found that it was in the range that the back of the boundary line of 20 times which moved an end part to the center, and the wall was connected it. It was proved more than these results that the quantitative estimation of the experimental value was possible by this appraisal method when a simple and easy method was devised as the way of estimating effect on a decrease in vibration by the composition isolation wall and compared with experiment value.