强夯施工方案

1目录一、编制依据······················································································································2二、工程概况及技术要求·······································································································2三、施工准备······················································································································2（一）设备准备·············································································································2（二）劳动力准备··········································································································3（三）技术准备·············································································································3（四）工程形象进度计划·································································································4四、操作流程······················································································································6（一）作业条件·············································································································6（二）工艺流程·············································································································6（三）施工参数的确定····································································································6（四）操作方法·············································································································71．强夯工艺要点······································································································72．施工操作要点······································································································73．雨期强夯施工措施································································································8（五）质量过程控制流程·······························································································10（六）注意事项···········································································································11五、验收标准····················································································································13六、主要保证措施··············································································································13（一）质量保证措施·····································································································13（二）职业健康和安全保证措施······················································································14（三）文明施工和环境保证措施······················································································16（四）安全纪律···········································································································17（五）防火须知···········································································································182一、编制依据《建筑工程施工质量验收统一标准》（GB50300—2001）；《建筑地基基础工程施工质量验收规范》（GB50202—2002）；《建筑地基处理技术规范》（JGJ79—2002）《施工组织设计》本工程的设计图纸、设计变更及图纸会审记录二、工程概况及技术要求工程名称:建设地点：工程概况:位于钦州港开发区东南部的钦州港一号路南段二期道路工程(K0+000至K3+560)全长3560米，宽60米。本工程沿线地质与结构比较复杂，沿途经过多为海蚀海岸、林地、泥滩等，不良地质主要为素填土、淤泥等软土层，按设计要求直接进行吹砂挤淤填海，因此要求对路基填土进行强夯处理。强夯法是通过一般10～40t的重锤和10～40m的落距，对地基土施加很大的冲击能的一种地基加固方法。在地基土中所出现的冲击波和动应力，可提高地基土的强度、降低土的压缩性、改善砂土的抗液化条件、消除湿陷性黄土的湿陷性等。同时，夯击能还可提高土层的均匀程度，减少将来可能出现的差异沉降。处理面积：约为22.5万㎡（长3560m×宽63m）。施工工期：计划于2008年8月20日开工,2008年10月19日完工，总工期60天（日历天）。工程技术要求：该场地大部分为吹砂填海,地质比较复杂。本工程拟定采用15～20T重锤，落距为15～20m进行强夯，要求至少点夯三遍，满夯一遍。夯点间距6米，夯点的夯击次数根据现场的试验段施工确定；夯点的收锤标准，以最后两击的夯沉差小于小于80mm即可。三、施工准备（一）设备准备1．夯锤：可用钢材制作，或用钢板为外壳，内部焊接骨架后灌注混凝土制成。夯锤底面为方形或圆形。锤底面积宜按土的性质确定，锤底静接地压力值可取25～40kPa，对于细颗粒土锤底静接地压力宜取较小值。夯锤的底面宜对称设置若干个与其顶面贯通的排气孔，孔径可取250～300mm。2．起重机械：宜选用起重能力15t以上的履带式起重机或其他专用起重设备，但必须3满足夯锤起吊重量和提升高度的要求，并均需设安全装置，防止夯击时臂杆后仰。3．自动脱钩装置：要求有足够强度，起吊时不产生滑钩；脱钩灵活，能保持夯锤平稳下落，挂钩方便、迅速。4．铲车：用作回填、整平夯坑和作地锚。5．检测设备：有标准贯入度、静力触探或轻便触探等设备以及土工常规试验仪器。6.测量仪器见下表：测量仪器配备清单序号仪器名称型号数量产地备注1经纬仪J21台2水准仪DZ22台北京、苏州3塔尺5m2把4钢尺50m2把5对讲机视实际情况定（二）劳动力准备强夯施工过程中，基本上都是以机械作业为主，杂工辅助。因此对劳动人员数量需求不是很大，单机单班劳动力如下：起重司机1名、起重工2名；辅助工4名。依次类推。（三）技术准备1．应有工程地质勘察报告、强夯场地平面图及设计对强夯的效果要求等技术资料。2．结合场区内的具体情况，编制施工组织设计或施工方案。3．对现场施工人员进行技术交底，专业工种应进行短期专业技术培训。4．进行测量基准交底、复测及验收工作。5．其他技术准备工作。4（四）工程形象进度计划本工程计划工期为60天，要求至少点夯三遍，满夯一遍。地基强夯施工形象进度计划详见下图。地基强夯施工进度计划表序号项目名称单位作业人数开工时间竣工时间施工强度2008年8月2008年9月2224262830312468101214161820221人员组成天8.208.222资料准备天8.208.223场地准备天8.208.264设备准备天8.208.265第一遍点夯天88.249.66第二遍点夯天89.69.207第三遍点夯天89.2010.48满夯天89场地平整天1010复核高程天25地基强夯施工进度计划表(续表)序号项目名称单位作业人数开工时间竣工时间施工强度2008年9月2008年10月2426283024681012141618201人员组成天8.208.222资料准备天8.208.223场地准备天8.208.264设备准备天8.208.265第一遍点夯天88.249.66第二遍点夯天89.69.207第三遍点夯天89.2010.48满夯天810.410.189场地平整天1010.810.2010复核高程天210.810.206四、操作流程（一）作业条件1．场地已整平，机械设备进出场道路已修好。表面松散土层已经预压。雨期施工周边已挖好排水沟，防止场地表面积水。2．现场积水已排除，满足机械行走作业。（二）工艺流程强夯施工的目的和原则是合理利用场地的地质条件、岩土工程特性，做到因地制宜、因时制宜；应用新技术、新设备、新材料、新工艺，做到技术先进，确保质量、安全可靠，施工快速、经济合理。通过强夯提高地基承载力，减少地基压缩变形量，满足设计要求。其施工工艺流程如下：强夯施工工艺流程（三）施工参数的确定强夯施工参数的确定依据是本工程场地的地质条件即高填方路段的土质情况和具体工程要求以确定，主要参数有：单点夯击能、夯击次数、夯击间隔时间、夯点布置及夯距。强夯施工前，应在现场有代表性的场地上选取一个或几个试验区，进行试夯或试验性施工，以确定相应的施工参数。试验区数量应根据建筑场地的复杂程度、建设规模及建筑类型确定。场地平整标高测量第一遍夯点放样第一遍夯点施工夯坑补填料、整平标高测量第二遍夯点放样第二遍夯点施工夯坑补填料、整平标高测量夯坑补填料、整平平第三遍夯点施工第三遍夯点放样样满夯整平标高测量场地整平7单点夯击能：3000KN·