预应力桥梁在使用阶段时,由于没有可靠的资料验证上拱度的变化和终极值,在结构设计中往往预留上拱与张拉后的上拱引起桥上线路过大的偏差,必须用上部建筑调整线路纵坡,在无碴无枕梁的设计中,有的在桥面承轨 Prestressed bridge in the use of stage, due to the absence of reliable data to verify the camber change and the ultimate value, often reserved in the structural design of the arch and the tension caused by the arch on the bridge caused by excessive deviation must be used in the upper Building adjustment line longitudinal slope, ballastless pillow in the design, some bearing the bridge deck