| 摘要 |
A construction method of an arched bridge is provided to reduce manpower and construction period, and to cut down construction cost by reducing material in constructing the arched bridge and manufacturing the arched bridge on the spot. A steel pipe is manufactured, and the curved steel pipe is hinged and assembled on the spot. The steel pipe is pulled up by a crane, and an arch is formed by fitting a key segment to a center of a steel pipe frame. A load support point with a ground anchor is installed on the center of the arch, and the steel pipe is connected to a dead man anchor by a centrifugal steel cable. Load is supported by the centrifugal steel cable by adding axial force in applying tension, and the arch of the steel pipe frame is modified by adjusting tension. A movable form is arranged at an end of the arch steel pipe, and the arch is constructed by assembling a steel reinforcing bar, pouring and curing concrete and moving the movable form along the steel pipe structure. A concrete support(23) is vertically installed on an arch rib, and a concrete slab(25) is constructed. The centrifugal cable is removed in finishing the frame of a bridge, and the steel pipe is formed of a rectangular pipe, a circular pipe, an I-beam or an H-beam. |
