| 摘要 |
PROBLEM TO BE SOLVED: To provide a work execution method for lightweight fill without decreasing strength and capable of preventing the occurrence of deformation and falling of a wall when a rigid polyurethane foam is foamingly filled to construct the lightweight fill. SOLUTION: The work execution method for the lightweight fill is so constituted that the contraction of the rigid polyurethane foam 19 does not influence a strut 14 so as to prevent the enter of the rigid polyurethane foam 19 by surrounding the strut 14 to provide a partition member 17, an edge cutting material 18 provided to the surface of the lightweight fill side of the wall 13 to make no adherence of the wall 13 to the rigid polyurethane foam 19, alternatively both of them can be peeled off even if they are adhered to each other. The work execution method for the lightweight fill is so constituted that the rigid polyurethane foam 19 is foamingly filled among the partition member 17, the edge cutting material 18 and a bedrock 11, the lightweight fill is constituted of only the rigid polyurethane foam 19 so that the contraction of the rigid polyurethane foam 19 with a greater volume does not influence the wall 13 and the strut 14, and a second hard polyurethane foam 19a is foamingly filled in a gap 20 including a gap resulting from the contraction to integrally adhere to the wall 13 to construct the lightweight fill of the hard polyurethane foams 19 and 19a. COPYRIGHT: (C)2004,JPO&NCIPI
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