人工挖孔桩专项施工方案专家评审版.docx
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人工挖孔桩专项施工方案专家评审版.docx
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人工挖孔桩专项施工方案专家评审版
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人工挖孔桩专项施工方案
编制:
审核:
审批:
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******************************人工挖孔桩专项施工方案
第一章编制依据 ............................................................................................................1
第二章工程概况 ............................................................................................................1
2.1概述 .......................................................................................................................1
2.2桩基分布情况 .......................................................................................................2
2.2地貌、地质 、水文情况 .....................................................................................3
第三章计划安排 ..............................................................................................................4
3.1施工组织机构 .......................................................................................................4
3.2劳动力配置 ...........................................................................................................5
3.3主要施工机械设备 ...............................................................................................6
3.4材料准备 ...............................................................................................................6
3.5电力准备 ...............................................................................................................7
3.6施工场地布置 .......................................................................................................7
3.7进度计划 ...............................................................................................................8
第四章施工方案 ............................................................................................................9
4.1施工测量 ...............................................................................................................9
4.1.1主轴线控制网的布设 ................................................................................9
4.1.2桩心的定位测量 ........................................................................................9
4.1.3护壁成型后的测量工作 ............................................................................9
4.1.4测量技术复核工作 ....................................................................................9
4.2成孔工艺 ...............................................................................................................9
4.2.1孔桩开挖施工组织 ....................................................................................9
4.2.2施工方法 ..................................................................................................10
4.3钻爆设计 .............................................................................................................16
4.3.1爆破参数 ..................................................................................................16
4.3.2单位用药量系数 ......................................................................................16
4.3.3确定周边眼间距E ..................................................................................17
4.3.4炮眼深度 ..................................................................................................17
4.3.5炸药及雷管的选择:
..............................................................................17
4.3.6炮眼布置 ..................................................................................................17
4.3.7爆破器材与起爆网络 ..............................................................................18
4.3.8药量计算 ..................................................................................................18
4.3.9安全距离检算 ..........................................................................................21
4.3.10爆破器材选型 ........................................................................................22
4.3.11装药结构 ................................................................................................22
4.3.12起爆方法 ................................................................................................22
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4.3.13防护 ........................................................................................................22
4.4其他开挖注意事项 .............................................................................................23
4.5终孔 .....................................................................................................................24
4.6钢筋笼制作安装 .................................................................................................24
4.6.1一般要求 ..................................................................................................24
4.6.2钢筋笼制作方法 ......................................................................................25
4.6.3声测管安装 ..............................................................................................25
4.6.4钢筋笼连接 ..............................................................................................26
4.6.5钢筋笼的运输 ..........................................................................................26
4.6.6钢筋笼的吊装 ..........................................................................................26
4.7桩身混凝土施工 .................................................................................................28
4.7.1混凝土配制 ..............................................................................................28
4.7.2无水条件下浇筑混凝土 ..........................................................................29
4.7.3清水条件下灌注水下混凝土 ..................................................................29
4.8人工挖孔桩施工中常见问题的处理 ...............................................................30
4.8.1断桩 ..........................................................................................................30
4.8.2地下水 ......................................................................................................32
4.9桩头处理及质量检测 .......................................................................................32
4.9.1主控项目 ..................................................................................................32
4.9.2一般项目 ..................................................................................................32
第五章施工质量保证措施 ............................................................................................33
5.1质量目标 ...........................................................................................................33
5.2原材料质量保证 ...............................................................................................33
5.3挖孔灌注桩质量控制措施 ...............................................................................33
5.4冬季施工质量保证措施 ...................................................................................35
5.5雨季施工质量保证措施 ...................................................................................36
第六章工期保证措施 ....................................................................................................37
6.1从组织管理上保证工期 .....................................................................................37
6.2缩短施工准备期,尽早进入工程实体施工 .....................................................37
6.3充分利用并做好网络技术计划,充分重视技术超前工作 .............................37
6.4确保物资供应,搞好机械保养维修 .................................................................38
6.5实行工期目标责任制 .........................................................................................38
6.6加强对外协调力度,促进施工进展 .................................................................38
第七章安全保证措施 ....................................................................................................38
7.1安全目标 .............................................................................................................38
7.2安全生产保证体系 .............................................................................................39
7.3安全管理 .............................................................................................................39
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7.4安全生产组织机构及职责 .................................................................................39
7.5安全制度 .............................................................................................................40
第八章危险源管理 ........................................................................................................41
8.1危险源分析 .........................................................................................................41
8.2安全技术控制措施 .............................................................................................41
8.2.1施工前安全准备 ......................................................................................42
8.2.2坠物落入孔内的预防措施 ......................................................................42
8.2.3人落入孔内的预防措施 ..........................................................................42
8.2.4触电的预防措施 ......................................................................................42
8.2.5塌孔产生的原因、预防措施及处理方法 ..............................................42
8.2.6桩孔内有毒气体逸出致使人员窒息的预防措施 ..................................43
8.2.7人工挖孔作业安全技术措施 ..................................................................43
8.2.8施工用电安全技术措施 ..........................................................................44
8.2.9施工爆破安全技术措施 ..........................................................................45
8.2.10安全防护用品及防护设施的正确使用 ................................................47
8.2.11机械设备的安全使用 ............................................................................48
第九章应急救援预案 ..................................................................................................49
9.1 编制目的 ...............................................................................................................49
9.2 适用范围 ..................................................................
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