县绕城北路建设工程项目盐井坝、花园沟和朱家湾三座大桥旋挖钻孔灌注桩专项施工方案目录一、工程概况......................................................................................................................................3二、编制说明......................................................................................................................................4三、机械配备及人力组织..................................................................................................................5四、施工测量......................................................................................................................................8五、工程试验......................................................................................................................................8六、施工方案......................................................................................................................................91、钻孔桩施工测量控制............................................................................................................92、护筒制作、埋设及拔除.......................................................................................................103、泥浆制备及处理..................................................................................................................104、钻孔成孔..............................................................................................................................10七、钢筋笼的制作、安装................................................................................................................131、钢筋笼制作..........................................................................................................................132、钢筋笼吊装..........................................................................................................................133、安装声测管..........................................................................................................................144、混凝土灌注导管连接..........................................................................................................14八、混凝土材料及混凝土灌注.........................................................................................................151、配制砼所用材料要求..........................................................................................................152、水下混凝土灌注..................................................................................................................15九、钻孔灌注桩事故分析及处理方案.............................................................................................171、坍孔......................................................................................................................................172、钻孔漏浆..............................................................................................................................183、缩孔......................................................................................................................................194、漏浆......................................................................................................................................195、钢筋笼上浮......................................................................
