湛江冲孔引孔桩工程施工组织方案详解.docVIP

PHC管桩引孔工程 专 项 施 工 方 案 编制单位：上海宝冶建设有限公司 编制日期： 目 录 一、工程概况···········································4 1、地质条件············································4 2、工程范围及工程量····································4 3、本工程的特点、重点··································4 二、施工部署···········································5 1、现场准备············································5 2、技术准备············································5 3、物资准备············································6 三、工程目标···········································6 四、项目管理机构及劳动力组织···························6 五、施工进度计划及工期保证措施·························7 1、施工进度计划········································7 2、工期保证措施········································7 六、施工方案及施工方法·································9 1、施工准备············································9 2、（钻）冲孔引孔桩施工工艺流程·························10 3、施工方法············································10 4、冲孔引孔桩质量控制··································13 七、泥浆制作、储备及应急·······························13 八、质量保证体系及保证措施·····························15 1、质量保证体系········································15 2、质量保证措施········································16 九、安全生产、文明施工保证措施························18 1、安全文明保证体系及保证措施·························18 2、文明施工与环境保护措施·····························23 附件：施工进度横道图 工程概况 地质条件介绍 需引孔区域位于原料场东侧及8#、7#、5#、4#转运站范围内，该区域土层下3～4米处存在3～4米厚的强风化、中风化玄武岩，PHC管无法打入需作引孔处理。该区域具体地质情况参武勘院提供的地质报告，这里不再做复述。 工程范围极工程量 本工程的基础采用Φ400、600管桩。冲孔引孔桩桩长约为7－9m，要求穿过玄武岩层，桩孔直径为Φ800，总共370根左右。 本工程特点、重点 工程特点 本工程施工内容为冲孔引孔桩。桩径小，土部地质层泥浆自造力差，岩层较厚，数量较多，并且工期紧张。同时与其它施工队伍存在交叉作业。故事前需做好相互协调工作以确保按期完成该工作量。 （2）工程重点 因为上述特点，本工程的重点要放在工期保证上。为保证工期，应对可能影响施工进度的各种因素进行估计，制定相应的预防和处理措施；加强施工管理，确保因管理水平而影响施工进展的事情不发生；制定切实可行的工期保证措施。 施工部署 现场准备 施工前应做好场地平整工作，对不利于施工机械运行的松散场地，采取垫层处理（碎砖块）。提早对放置泥浆池的位置进行初步开挖，为施工做好准备。 在工程开工前，技术负责人组织参加施工的人员对具体关键工序、施工难点、质量要求、操作要点和注意事项进行详细的技术交底。 应具备施工区域内的工程地质资料、经会审确定的施工图纸、施工组织设计、各种原材料及其抽检试验报告以及有关资料。 根据设计图纸要求，准备不同的施工机械，并准备好各种备用的机械，并保证所有进场机械的性能必须满足成孔的设计要求。 技术准备 根据甲方提供和经监理单位复核的永久性坐标基准点和高程，按照建筑施工总平面图要求引入高程，建立施工测量控制网。 按照设计图纸精确定位，进行施工