| 摘要 |
PROBLEM TO BE SOLVED: To provide a vibration cutoff structure which easily conforms to the characteristics of the ground, is good in transportability and workability, and also good in stability after construction thereof. SOLUTION: The vibration cutoff structure (10) is constituted of a groove (20) dug in the ground (1) at a location between a vibration source and a structure which should be protected from transmission of vibrations, and a three- dimensional network body (30) arranged in the groove. The three-dimensional network body consists of wire materials formed of a plastic such as a PP (polypropylene) resin or a PET(polyethylene terephthalate) resin, for instance, and is molded such that the adjacent wire materials are connected together with voids being left therebetween like entangled dry noodles. Therefore, the network bodies different in wire diameter d and in porosity a can be easily produced, and a compression modulus e of the entire network body can be varied in a wide range according to the characteristics of the ground. Further, a nonwoven fabric (40) is interposed between the three-dimensional network body and a wall surface (21) of the groove in order to prevent infiltration of soil into the voids of the three-dimensional network body.
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