正循环钻孔施工综合方案目 录1 编制依据...................................................................................................................12 适用范围...................................................................................................................13 施工方法及工艺要求...............................................................................................1 施工准备.....................................................................................................................1 埋设护筒.....................................................................................................................2 钻机就位及钻孔.........................................................................................................3 清孔.............................................................................................................................4 钢筋笼骨架的制作安装.............................................................................................4 导管安装.....................................................................................................................6 灌注水下混凝土.........................................................................................................64 质量检测...................................................................................................................95 钻孔桩常见事故的预防及处理...............................................................................9 钢筋笼上浮...............................................................................................................10 坍孔...........................................................................................................................10 钻孔偏斜...................................................................................................................11 扩孔和缩孔..............................................................................................
