北京燕山石化公司最近成功的应用了预应力 V 形折板,作为库房屋盖,最大跨度为27m,这是我国目前最大跨度的折板结构。这种折板由铁道部北京房山桥梁厂设计和施工,总面积为3380~2,采用高低两跨(27~m 和15~m),波宽3~m,倾角42°,板厚6~(cm),两端各悬臂1.5~m,折板总长为30~m,主筋采用(?)5光圆 Beijing Yanshan Petrochemical Company recently successfully applied a prestressed V-shaped flap, as the Treasury roof, the maximum span of 27m, which is currently China’s largest span flap structure. The folding plate is designed and constructed by the Beijing Fangshan Bridge Factory of the Ministry of Railways with a total area of ​​3380 ~ 2. It adopts two levels of high and low span (27 ~ m and 15 ~ m), wave width 3 ~ m, dip angle 42 °, (cm), both ends of the cantilever 1.5 ~ m, the total length of the flap 30 ~ m, the main reinforcement (?) 5 light round