CONSTRUCTION METHOD FOR ROAD BRIDGE WITH PCa/PC FLOOR SLAB

To provide a construction of a road bridge using PCa/PC floor slabs applied to laying of a new road bridge such as an expressway and replacement of an existing road bridge.SOLUTION: PCa/PC floor slabs 1 are used including a notch 3 where a reinforcing bar 6 for joining PCa/PC floor slabs protrude in a bridge axis direction at an edge of the PCa/PC floor slab joint in the bridge axis direction and a raised portion 2 protruding in the bridge axis direction relative to the notch 3 at the edge perpendicular to the bridge axis direction. The PCa/PC floor slabs 1 are sequentially erected so that edge protrusion portions 2b of the raised portions 2, 2 of the PCa/PC floor slabs 1 adjacent to each other in the bridge axis direction abut each other in the bridge axis direction, and the reinforcing bars 6 for joining PCa/PC floor slabs of the notch 3 overlap each other. A PCa wall railing 10 is placed above the raised portion 2. A space filling concrete 8 is cast at a space filling portion 4 formed by the notch 3 abutting. A loop reinforcement is used as the reinforcing bar 6 for joining PCa/PC floor slabs, and a shear key 15 is placed at an abutting portion of the edge protrusion portions 2b of the raised portions 2, 2.SELECTED DRAWING: Figure 1 【課題】高速道路などの新設道路橋の敷設や既設道路橋の架け替えに適用されるPCa・PC床版を用いた道路橋の施工方法を提供する。【解決手段】橋軸方向のPCa・PC床版接合端部にPCa・PC床版接合用鉄筋6が橋軸方向に突出する切欠き部3、橋軸直角方向の端部に切欠き部3に対し橋軸方向に突出する嵩上げ部2をそれぞれ備えたPCa・PC床版1を用いる。PCa・PC床版1を順次、橋軸方向に隣り合うPCa・PC床版1の嵩上げ部2,2の端部突出部2b同士が橋軸方向に互いに当接し、かつ切欠き部3のPCa・PC床版接合用鉄筋6どうしがオーバーラップするように架設する。嵩上げ部2の上にPCa壁高欄10を配置する。切欠き部3が突き合わさることによって形成される間詰め部4に間詰めコンクリート8を打設する。PCa・PC床版接合用鉄筋6としてループ鉄筋を用い、嵩上げ部2,2の端部突出部2b同士の当接部にシアキー15を配置する。【選択図】図１