PRECAST MEMBER AND LIFTING STRUCTURE OF PRECAST MEMBER

• Main Authors: FUJIOKA TAISUKE, NAGAMOTO NAOKI
• Format: Patent
• Language: English; Japanese
• Published: 26.03.2024
• Subjects: ASSEMBLY OF BRIDGES; BUILDING; BUILDING IMPLEMENTS OR OTHER BUILDING AIDS, OR THEIRUSE; CEILINGS; CONSTRUCTION OF BRIDGES; CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES; CRANES; FIXED CONSTRUCTIONS; FLOORS; FORMS; GENERAL BUILDING CONSTRUCTIONS; HANDLING BUILDING MATERIALS ON THE SITE; HAULING; HOISTING; INSULATION OR OTHER PROTECTION OF BUILDINGS; LIFTING; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS,WINCHES, OR TACKLES; OR VIADUCTS; PERFORMING OPERATIONS; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTINGBUILDINGS; ROOFS; SCAFFOLDING; SHUTTERING; TRANSPORTING; WALLS, e.g. PARTITIONS

To suppress the future deterioration of precast members.SOLUTION: A precast member (5) includes: a concrete body 14; and multiple insert members 15 buried in the concrete body 14 for locking during lifting. The insert member 15 is made of fiber-reinforced plastic and has a protruding part 15b that protrudes from an upper surface of the concrete body 15. Since the insert member 15 has the protruding part 15b, there is no need to provide a through hole or a box-out on an upper surface of the concrete body 14, and there is no need to provide post-fill materials on the upper surface of the concrete body 14. Therefore, occurrences of cracks and edge separation are suppressed.SELECTED DRAWING: Figure 3 【課題】プレキャスト部材の将来の劣化を抑制する。【解決手段】プレキャスト部材（５）は、コンクリート本体１４と、吊り上げ時の係止のためにコンクリート本体１４に埋設された複数のインサート部材１５とを備える。インサート部材１５は、繊維補強プラスチックからなり、且つコンクリート本体１５の上面から突出する突出部１５ｂを有する。インサート部材１５が突出部１５ｂを有するため、コンクリート本体１４の上面に貫通孔や箱抜きを設ける必要がなく、後埋材をコンクリート本体１４の上面に設ける必要もない。よって、ひび割れや縁切れの発生が抑制される。【選択図】図３