BOX CULVERT

To provide a box culvert made of precast concrete, the box culvert being able to secure the quality of its skeleton and preventing a delay in its construction process.SOLUTION: A box culvert 100 made of precast concrete and having a substantially rectangle cross-section formed in an arch shape at a corner part 1 comprises: a bottom-slab member 12 substantially U-shaped and including right and left ends each forming the corner part 1; side wall members 14 disposed facing each other on both right and left ends of the bottom-slab member 12; a top-slab member connecting upper parts of the side wall members 14 with each other and disposed facing the bottom-slab member 12; and a camber member 18 disposed in the lower side of the corner part 1 of each of the right and left ends of the bottom-slab member 12 in order to reduce stress and strain generated in the bottom-slab member 12 in a cantilever state when constructing the side wall members 14 and the top-slab member.SELECTED DRAWING: Figure 1 【課題】躯体の品質を確保することができるとともに、施工工程を遅延させないプレキャストコンクリート製のボックスカルバートを提供する。【解決手段】コーナー部１がアーチ形状に形成された略矩形断面の躯体からなるプレキャストコンクリート製のボックスカルバート１００であって、左右両端がコーナー部１を形成する略Ｕ字状の底版部材１２と、この底版部材１２の左右両端の上に対向配置される側壁部材１４と、側壁部材１４の上部どうしを接続するとともに底版部材１２に対して対向配置される頂版部材と、側壁部材１４および頂版部材を架設する際の片持ち状態の底版部材１２に生じる応力およびひずみを低減するために、底版部材１２の左右両端のコーナー部１の下側に設けられるキャンバー材１８とを備えるようにする。【選択図】図１