宁波地铁拔桩技术

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1、目录一、编制依据······································1二、工程概况······································12.1、工程简况···································12.2、拔桩区域周边建筑物情况·······················1三、施工总体部署··································13.1、机械型号及原理······························13.2、施工现场管理·····················

2、···········3四、施工准备······································44.1测量放线····································44.2机械组装及检测·······························4五、灌注桩除施工方案······························45.1施工工艺····································45.2施工方法····································4六、工程质量保证措施·········

3、·····················76.1施工质量保证措施·····························76.2工期保障措施······································86.3安全生产措施······································86.4文明施工··········································12七、风险因素以及应急预案··························157.1预防高空作业过程中发生人员伤亡事故·················157.

4、2高处落物伤害应急救援措施···························167.3防止吊机发生倾覆事故·······························167.4预防漏电造成的人员伤亡事故·························16一、编制依据本施工组织设计引用的规范标准：《宁波市轨道交通1号线一期工程全线盾构区间拆复桥梁资料》《地下铁道、轻轨交通工程测量规范》（GB50308-1999）《工程测量规范》（GB50206-93）《建筑桩基技术规范》（JGJ94-94）二、工程概况2.1工程简况宁波市轨道交通1号线一期工程起于市区西部的高桥镇，终于

5、市区东部的东外环路站。大部分区间采用盾构区间。为保证盾构顺利掘进，需要将盾构掘进过程中碰到的桥桩先拔除，沿线共有11座桥梁部分桩基需要拔除以及盾构沿线障碍桩拔除。由于桩的埋深较深，无条件采用一般围护结构取桩的施工技术措施，拟选择高效、快速、环保的全套管新技术进行拔桩处理。本工程拔桩范围为11座拆复桥梁桩基和沿线障碍桩。桥梁桩基约95根，类型为钻孔灌注桩，桩径为600、800、1000三种。障碍桩约206根，包括建筑物基础和管线桥基础，类型有沉管灌注桩、钻孔灌注桩等，部分桩类型需先探明后才明确。具体内容如下表：序拔桩数所在权属里程桥梁名称拔除桩类型号量（根）位置单位东侧2根80

6、0钻孔桩中宁1K7+505西郊路桥南半幅6西侧4根600钻孔桩山波东侧12根600钻孔桩东市2K9+538西门板桥南半幅约25西侧13根600钻孔桩路市河道中间需探政东侧4根800钻孔桩管3K14+151洞桥全幅7西侧3根800钻孔桩理东侧3根800钻孔桩处4K14+628过旧桥北半幅6西侧3根800钻孔桩东侧2根800钻孔桩5K14+868太古桥北半幅4西侧2根800钻孔桩东侧3根800钻孔桩6K15+483七里垫桥北半幅7西侧4根800钻孔桩东侧3根800钻孔桩7K15+715史家桥北半幅5西侧2根800钻孔桩东侧3根800钻孔桩，3根1000钻孔桩8K16+120魏家桥

7、北半幅14西侧4根800钻孔桩，4根1000钻孔桩东侧1根800钻孔桩9K18+840梅墟港桥全幅2西侧1根800钻孔桩宁东侧1根800钻孔桩10K19+170永安桥全幅2波西侧1根800钻孔桩宁市穿东侧4根800钻孔桩交路西侧4根800钻孔桩通11K19+765水阁桥全幅17桥墩1根800钻孔桩，局方桩8根沿线障碍12分布于12处，约206根桩2.2拔桩区域周边建筑物情况本工程拔桩施工有施工区域小、管线复杂、且受交通影响大等特点，中山路为城市主干道，拔桩施工为半幅施工半幅通行，对安全风险控制要求高。例