目 录1 工程概况..............................................................................................................................12 人工挖孔施工方法 ............................................................................................................... 0 2.1 机具设备准备 ............................................................................................................ 0 2.2 挖孔灌柱桩的施工程序 ............................................................................................ 0 2.3 同一墩台各桩开挖顺序 ............................................................................................ 1 2.4 挖孔 ........................................................................................................................... 1 2.5 混凝土护壁 ................................................................................................................ 1 2.6 孔内通风 .................................................................................................................... 2 2.7 排水 ........................................................................................................................... 2 3 挖孔桩竖井爆破设计 ( 桶形掏槽爆破 ) ................................................................................ 2 4 安全保证措施 ....................................................................................................................... 3 4 .1 一般安全保证措施 .................................................................................................... 3 4 .2 爆破安全控制设计 .................................................................................................... 4 4 。 3 爆破安全控制管理程序 ......................................................................................... 5 大中桥人工挖孔桩施工安全技术方案1 工程概况本合同段桩基基本上为挖孔桩基,桩径为1。2m、1.5m和1。8m三种,桩长为9~38m，其中15~20m长的桩占...
