【摘要】 对北京某地下人行通道出现的挠度大、残余变形大等问题进行了分析。原结构较大面积的严重渗水致使混凝土的耐久性能受损、钢筋严重锈蚀是问题产生的主要原因。针对这些原因 ,通过方案比较和优化 ,提出了经济实用的钢 混凝土组合结构加固方案 ,并对加固方案产生的效益进行了分析比较更多还原

【Abstract】 Over large deflection and over large remaining deformation are analyzed in a underground passageway in Beijing city.All these results are in serious seepage of the structure,which leads to damage of durability of concrete and reinforcement.Among several rehabilitation programs to resolve those problems,an economical and practical program of rehabilitation is chosen with optimal cost and rehabilitated structure behavior,which uses composite steel concrete technology,and its effects are shown to be very good.更多还原