1．施工准备.............................................................................................................12．护筒埋设.............................................................................................................13．泥浆拌制.............................................................................................................14．钻机就位.............................................................................................................15．钻孔作业.............................................................................................................16．成孔检查.............................................................................................................27．钢筋笼的制作及吊装就位.................................................................................28．灌注混凝土.........................................................................................................39．灌注注意事项.....................................................................................................510．常见施工质量问题及防治措施.......................................................................610.1 护筒冒水.....................................................................................................610.2 孔壁坍陷.....................................................................................................610.3 缩颈.............................................................................................................710.4 钻孔偏斜.....................................................................................................710.5 桩底沉渣量过多.........................................................................................811．水下混凝土灌注过程中出现的施工质量问题及防治措施...........................811.1 卡管.............................................................................................................811.2 钢筋笼上浮...................................
