SEALING STRUCTURE FOR GROUT MATERIAL, AND BACK-UP MATERIAL FOR GROUT SEALANT

摘要

PROBLEM TO BE SOLVED: To provide a sealing structure for a grout material and a back-up material for a grout sealant that enable the grout sealant to be inserted into and fitted to a pile without a damage even when a gap between the pile and a sheath pipe is large, and eliminate a need to fill the grout material twice regardless of a size of the gap.SOLUTION: A sealing structure 100 for a grout material fixes a pile 1 with a sheath pipe 2 inserted externally onto the pile 1 with a grout material filled into a gap between the pile and the sheath pipe. The sealing structure includes: an elastic grout sealant 10 comprising a fixing part 20 fitted on an inner peripheral surface 2a of a sheath pipe 2, and a grout sealing part 30 for supporting the grout material and including a contacting part 32 extending from the fixing part 20 and inserted into and fitted to an outer peripheral surface 1a of the pile 1, being deformed elastically to come in contact with the outer peripheral surface 1a of the pile 1 for sealing; and a plurality of back-up materials 50 disposed radially below the fixing part 20, having a base edge part fitted on the sheath pipe 2, allowing changes in the gap between the pile 1 and the sheath pipe 2, having a distal end remaining in contact with a lower side the contacting part 32, and capable of supporting a load of the grout material.SELECTED DRAWING: Figure 3