人工挖孔墩基础方案

马山旧城改造一期项目a地块人工挖孔灌注墩施工方案

一、工程概况·························································································1二、施工准备·························································································3

2.1材料及主要机具：········································································32.2作业条件：··················································································4三、操作工艺·························································································4四、质量标准·························································································9

4.1保证项目：················································································104.2基本项目：················································································104.3允许偏差项目·············································································10五、成品保护························································································11六、应注意的质量问题············································································11九、主要安全技术措施············································································18十、质量记录························································································20十一、墩孔塌孔应急预案·········································································20