新建大同至西安铁路客运专线站前施工-4标段线下工程〔DK351+387～DK365+772〕钻孔灌注桩施工技术交底中交三航大西铁路客运专线指挥部三工程部2021年4月目录1交底根据..................................................................................................................................-1-2工程概况..................................................................................................................................-1-3主要施工..................................................................................................................................-3-3.1施工准备.........................................................................................................................-3-3.2护筒埋设.........................................................................................................................-4-3.3泥浆池开挖、泥浆制备及控制指标.............................................................................-4-3.4钻进成孔.........................................................................................................................-4-3.5终孔、清孔.....................................................................................................................-6-3.6钢筋笼加工与吊放.........................................................................................................-6-3.7水下砼浇筑.....................................................................................................................-8-3.8导拆、拔控制.................................................................................................................-9-3.9检孔器制作......................................................................................................................-9-3.10声测安装......................................................................................................................-10-3.11桩基综合接地..............................................................................................................-11-4常见事故的预防及处理........................................................................................................-11-4.1桩位偏向........................................................................................................................-11-4.2偏孔事故........................................................................................................................-11-4.4堵事故............................................................................................................................-12-4.5浮笼或掉笼事故............................................................................................................-13-4.6断桩、夹泥、夹心事故................................................................................................-13-5施工验收................................................................................................................................-14-5.1验收相关参考...............................................................................................................-14-5.2清孔................................................................................................................................-14-5.3钻孔桩允许偏向...........................................................................................................
