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xx水源地原水工程xx顶管测量专项方案编制人：审核人：审批人：xx股份有限公司xx目录一、编制依据······················································································3二、编制目的······················································································3三、工程简介····················································································33.1工程概况···················································································33.2工程地理位置及周围环境情况························································33.3主要内容····················································································4四、人员组织及仪器配备······································································4五、测量放样的基本内容和要求·····························································55.1概述··························································································55.2检查、复核测量桩志····································································55.3测量放样基本内容·······································································55.4桩志布设····················································································55.5基本技术要求··············································································5六、平面控制测量···············································································66.1平面控制点检测···········································································66.2地面趋近导线测量·······································································6七、高程控制网测量············································································77.1水准控制点检测···········································································77.2地面趋近水准测量·······································································7八、联系测量······················································································78.1水准测量····················································································78.2轴线测量····················································································8九、顶管施工测量···············································································89.1测量目的····················································································89.2测量方法····················································································99.3轴线测量控制措施·······································································9十、竣工测量·····················································································10十一、测量误差控制···········································································1011.1图纸误差复核···········································································1011.2保证控制网布设精度的控制·························································1011.3控制点精度措施········································································10十二、顶管施工测量及测量纠偏方法······················································1112.1顶管施工测量···········································································1112.2测量纠偏控制···········································································1212.3地面沉降控制···········································································1212.4顶管进洞前后的测量·································································12十三、测量精度控制措施·····································································13十四、测量成果管理···········································································13十五、测量工作注意事项·····································································14一、编制依据（1）xx水源地原水工程xx支线工程（QJZ-C1）工程招标文件。（2）上海市政工程设计研究总院设计的施工图。（3）本工程招标答疑及澄清文件、补遗文件。（4）招标文件要求和适用于本工程的图纸、上海市现行的相关技术规范标准。二、编制目的本测量专项方案宗旨是按工程建设的基本规律、施工工艺规律，并按相关测量规范要求，制定相应可行的具体测量措施，用于指导现场施工。确保施工班组按照设计、规范施工，保证工程质量、进度。三、工程简介3.1工程概况xx水源地原水工程xx支线工程的管线总长度约8.646km，采用2根DN2800钢管（钢管壁厚为28mm），2根管线，中心间距为6m，管线全部采用顶管施工工艺。管道底部的平均埋深约在10m左右。本标段管道的基本走向为：由五号沟泵站0＃井（不含0＃井）起，沿A30西侧向南至5＃井（不含5＃井），顶管总长度约为：1.993km。全线设顶管工作井4座、接收井3座。共分（0＃接收井～1＃工作井；1＃工作井～1-1＃接收井；1－1＃接收井～1－2＃工作井；1－2＃工作井～2＃接收井；2＃接收井～2－1＃工作井；2-1#工作井～3#接收井；3#接收井～4#工作井；4#工作井～5#工作井。）8个顶管施工段。3.2工程地理位置及周围环境情况顶管线路具体走向为：原水管线由五号沟泵站接出后沿远东大道（A30）向南――xx路向西――华东路向南―xx泵站内工作井出井。根据岩土工程勘察报告显示，本工程施工管道沿线大部分为苗圃、农田，沿线地区地面标高一般在3.48～5.50m之间。顶管施工沿途将穿越5条河道，主要有联合河、三场河、新开河、大众河等河道。其中河床底标高最深的大众河河床底至DN2800钢管顶之间的距离约为3.7米左右。顶管施工主要涉及第②3、③、③夹层。第③层淤泥质粉质粘土，呈流塑状态，土质较均匀，局部夹多量薄层粉砂，顶管在该层土中顶进时顶进阻力小，易于顶进，但应注意该层局部夹砂较多；而第②3层及第③夹层以粉性土为主，呈松散～稍密状态，当管道位于浅部粉土时，其顶进阻力与粉土的密实度有关，土质松散的粉土层易于顶进；土质密实度高的粉土，顶进阻力就大，且顶管顶进时阻力有一定差异。本工程顶管施工需横穿正在施工的东靖路、巨峰路，根据物探资料显示，管道顶进穿越范围有电力通讯管道、自来水管道等重要的市政设施。3.3主要内容沉井施工的测量控制及顶管施工的测量控制。具体包括沉井的高程控制、井中心坐标的控制、套管轴线及标高控制、顶管高程及轴线控制。以及沉井下沉、顶管施工过程中对周边的监测。四、人员组织及仪器配备测量控制是贯穿工程施工全过程的十分关键的工作。为此，项目部成立专门测量放样小组，由具有理论和实际施工经验的有测量员证的工程师负责，控制测量根据工程各部位特点由专职测量队员实施，并及时做好有关施测纪录。人员配备：测量负责人2名，测量技术工4人。测量工作是一项集体性的行为，观测、记录、持尺人员要相互协作，紧密配合，确保测量精度。测量仪器配备：名称型号规格数量精度备注全站仪尼康DTM-4521测角精度±2″测距精度2mm+2ppm合格有效水准仪中翰AL-32X1±2mm合格有效钢卷尺5m和50m若干最小刻度1mm合格有效水准尺5m塔尺2刻度误差：≤±0.2mm合格有效五、测量放样的基本内容和要求5.1概述因本工程施工战线长，顶管沿线环境较为复杂，保护要求高。工程开工前，根据上海市测绘院提供的平面控制网点及水准网点，按照三角网、导线网及三等水准测量的要求，建立供施工使用的平面控制网及高程控制网，设立的控制网经监理人审定后，作为以后施工测量的依据，进行测量。5.2检查、复核测量桩志测量复核业主和上海市测绘院所交付xx原水工程测量控制点、水准点等桩志和有关测量资料，如有桩志不足、不妥、位置移动或精度与要求不符，均须进行补测、加固，