| 摘要 |
PURPOSE:To make lightweight structure available by a method wherein a plurality of pairs of arc-shaped precast concrete pillars, crossing each other at their tops, are prepared and concrete frame-works are formed thereby, being bound at their tops with prestressing steels, and further covered with covers. CONSTITUTION:A pair of arc-shaped precast concrete (PC) pillars 2 are assembled in an arch shape and two pairs of the PC pillars 2 are assembled, diagonally crossing each other. To a dust provided to the upper exterior of each of the four pieces of the PC pillars 2, assembled in diagonal positions, a prestressing steel is inserted and the pillars are bound thereby. Then concrete is placed thereon. After hardening of the concrete, tension is applied to the prestressing steel and a concrete framework 10 is structured thereby. A plurality of the frameworks 10 are laid in a row in the longitudinal direction of a road or the like and arch-shaped PC pillars 9A are installed at the front and the rear of the row. Then, the frameworks 10 and the PC pillars 9A are connected at their tops with a beam member 13. To through holes 5 provided to each of the frameworks and the PC pillars 9A, wires 14 are inserted and opposite ends of the wires are fixed to the PC pillars 9A with fixing members 15. The frameworks 10 are further covered with covers that are fixed to the frameworks. |
