PCA FLOOR SLAB JOINT STRUCTURE AND CONSTRUCTION METHOD THEREOF

• Main Authors: ASAI HIROSHI, HOSONO HIROMI, SANKA TAKASHI, FUJIWARA YASUHISA
• Format: Patent
• Language: English; Japanese
• Published: 15.06.2017
• Subjects: ASSEMBLY OF BRIDGES; CONSTRUCTION OF BRIDGES; CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES; FIXED CONSTRUCTIONS; OR VIADUCTS

PROBLEM TO BE SOLVED: To suppress occurrence of cracks of concrete and reduce reinforcement assembly work amount and concrete installation amount at the site in a PCa floor slab joint structure.SOLUTION: Lower reinforcement bars 27 are disposed below an overlapping part of a first lower joint reinforcement 21L and a second lower joint reinforcement 22L, which extend from facing joint ends of PCa floor slabs 8 disposed in proximity, so as to overlap and continue in a direction perpendicular to the bridge axis. The lower reinforcement bars surround multiple first lower joint reinforcements 21L and second lower joint reinforcements 22L on three sides. Upper reinforcement bars 28 are disposed above the overlapping part of a first upper joint reinforcement 21U and a second upper joint reinforcement 22U, which extend from the facing joint ends, so as to overlap and continue in the direction perpendicular to the bridge axis. The upper reinforcement bars surround multiple first upper joint reinforcements 21U and the second upper joint reinforcements 22U on three sides.SELECTED DRAWING: Figure 2 【課題】ＰＣａ床版の継手構造において、コンクリートのひび割れの発生を抑制し、現場での鉄筋組立作業量やコンクリート打設量を低減する。【解決手段】近接配置されたＰＣａ床版８の対向する接合端面から延出する第１下継手鉄筋２１Ｌ及び第２下継手鉄筋２２Ｌの互いに重なる部分の下方に配置され、橋軸直角方向にオーバーラップしながら連続する下補強筋２７により、複数本の第１下継手鉄筋２１Ｌ及び第２下継手鉄筋２２Ｌを３方から囲み、対向する接合端面から延出する第１上継手鉄筋２１Ｕ及び第２上継手鉄筋２２Ｕの互いに重なる部分の上方に配置され、橋軸直角方向にオーバーラップしながら連続する上補強筋２８により、複数本の第１上継手鉄筋２１Ｕ及び第２上継手鉄筋２２Ｕを３方から囲む構成とする。【選択図】図２