**********************人工挖孔桩专项施工方案编制：审核：审批：******************************人工挖孔桩专项施工方案*******************目录第一章编制依据.................................................................................................................1第二章工程概况.................................................................................................................12.1概述..........................................................................................................................12.2桩基分布情况..........................................................................................................22.2地貌、地质、水文情况.........................................................................................3第三章计划安排..................................................................................................................43.1施工组织机构..........................................................................................................43.2劳动力配置..............................................................................................................53.3主要施工机械设备..................................................................................................63.4材料准备..................................................................................................................63.5电力准备..................................................................................................................73.6施工场地布置..........................................................................................................73.7进度计划..................................................................................................................8第四章施工方案.................................................................................................................94.1施工测量..................................................................................................................94.1.1主轴线控制网的布设...................................................................................94.1.2桩心的定位测量...........................................................................................94.1.3护壁成型后的测量工作...............................................................................94.1.4测量技术复核工作.......................................................................................94.2成孔工艺..................................................................................................................94.2.1孔桩开挖施工组织.......................................................................................94.2.2施工方法.....................................................................................................104.3钻爆设计................................................................................................................164.3.1爆破参数.....................................................................................................164.3.2单位用药量系数.........................................................................................164.3.3确定周边眼间距Ｅ.....................................................................................174.3.4炮眼深度.........................................................................
