支架预压技术交底

We will continue to improve the company s internal control system and steady improvement in ability to manage and control optimize business processes to ensure smooth processes responsibilities in place to further strengthen internal controls play a control post independent oversight role of evaluation complying with third party responsibility to actively make use of internal audit tools detect potential management streamline standardize related transactions strengthening operations in accordance with law Deepening the information management to ensure full communication zero resistance To constantly perfect ERP and BFS and PI and MIS and SCM information system based construction full integration information system achieved information resources shared to expand Portal system application of breadth and depth play information system on enterprise of Assistant role to perfect daily run maintenance operation of records promote problem reasons analysis and system handover to strengthening BFS and ERP and SCM technology application of training improve employees application information system of capacity and level Humanistic care to ensure zero To strengthening Humanities care continues to foster company wind clear and gas are and heart Shun of culture atmosphere strengthening love helped trapped care difficult employees carried out style activities rich employees life strengthening health and labour protection organization career health medical control career against continues to implementation psychological warning prevention system training employees health of character and stable of mood and enterprising of attitude created friendly fraternity of Humanities environment To strengthen risk management ensure that the business of zero risk To strengthened business plans management will business business plans cover to all level ensure the business can control in control to close concern financial and coal electric linkage and energy saving scheduling national policy trends strengthening track active should to implementation State owned assets method further specification business financial management to perfect risk tube control system achieved risk recognition and measure and assessment and report and control feedback of closed ring management improve risk prevention capacity To further standardize trading and strive to achieve according to law standardize and fair Innovation of performance management to ensure that potential employees zero fly To strengthen performance management process control enhance employee evaluation and levels of effective communication to improve performance management To further quantify and refine employee standards Work full play party and branch and members in five type Enterprise construction in the of core role and fighting fortress role and pioneer model role to continues to strengthening four good leadership construction play levels cadres in enterprise development in the of backbone backbone role to full strengthening members youth work full play youth employees in company development in the of force role to improve independent Commission against corruption work level strengthening on enterprise business key link of effectiveness monitored And maintain stability To further strengthen publicity and education improve the overall legal system We must strengthen safety management establish and improve the education supervision and evaluation as one of the traffic safety management mechanism To conscientiously sum up the Olympic security controls promoting integrated management to a higher level higher standards a higher level of development Employees today is lunar calendar on December 24 the ox Bell is about to ring at this time of year we clearly feel the pulse of the XX power generation company to flourish to more clearly hear XX power generation companies mature and symmetry breathing Recalling past one another across a railing we are enthusiastic and full of confidence Future development opportunities we more exciting fight more spirited Employees let us together across 2013 full of challenges and opportunities to create a green low cost operation full of humane care of a world class power generation company and work hard The occasion of the Spring Festival my sincere wish that you and the families of the staff in the new year good health happy happy 支架预压技术交底支架预压技术交底 一 预压目的及程序一 预压目的及程序 1 为了保证现浇砼工程施工的质量 并保障工程施工安全 在满堂脚手 架施工过程中减少浪费 减少环境污染 保护环境的目的 2 首先进行承台施工回填土部位进行地基预压 确保地基的承载力满足 设计要求 依次根据设计要求和施工需要 支架体系搭设完成后 进行支架 体系的堆载预压 3 因为计算支架沉降量的计算公式均是近似的 精度有限 通过预压后 可以消除非弹性变形 得出弹性变形的较准确的数值 为所施工的结构更接 近于设计提供了有利条件 并保证了施工期间的结构安全 4 支架预压期间测量人员按测设的观测点进行测量复核 待荷载卸下后 再对原测设的观测点进行复核 并将历次所测结果进行分析比较 计算出支 架受压后的压缩变形 包括两部分的变形 永久变形和弹性变形 5 对于永久变形经过预压试验后可消除 不致使箱梁浇筑后造成箱梁裂 缝 而对于弹性变形可根据测量结果在支设模板时适当抬高底模标高即可 模板预拱度的调整通过调整模板支撑顶托完成 保证在箱梁浇筑混凝土 后 箱梁的底板标高能达到设计标高 二 地基预压二 地基预压 1 地基预压选择两个部位 一是 或号墩基坑回填部位 此处在干 3 4 渠桥内 该处地基承载力最大 二是 干渠岸上或号墩基坑回填土部位 2 5 此处在干渠桥岸上具有代表性 2 预压区单元划分及荷载 或号墩基坑回填部位 或号墩基坑 3 4 2 5 回填土部位顺桥向 5 米 纵桥向 22 5 米范围内 划分为 6 个单元格 每个单 We will continue to improve the company s internal control system and steady improvement in ability to manage and control optimize business processes to ensure smooth processes responsibilities in place to further strengthen internal controls play a control post independent oversight role of evaluation complying with third party responsibility to actively make use of internal audit tools detect potential management streamline standardize related transactions strengthening operations in accordance with law Deepening the information management to ensure full communication zero resistance To constantly perfect ERP and BFS and PI and MIS and SCM information system based construction full integration information system achieved information resources shared to expand Portal system application of breadth and depth play information system on enterprise of Assistant role to perfect daily run maintenance operation of records promote problem reasons analysis and system handover to strengthening BFS and ERP and SCM technology application of training improve employees application information system of capacity and level Humanistic care to ensure zero To strengthening Humanities care continues to foster company wind clear and gas are and heart Shun of culture atmosphere strengthening love helped trapped care difficult employees carried out style activities rich employees life strengthening health and labour protection organization career health medical control career against continues to implementation psychological warning prevention system training employees health of character and stable of mood and enterprising of attitude created friendly fraternity of Humanities environment To strengthen risk management ensure that the business of zero risk To strengthened business plans management will business business plans cover to all level ensure the business can control in control to close concern financial and coal electric linkage and energy saving scheduling national policy trends strengthening track active should to implementation State owned assets method further specification business financial management to perfect risk tube control system achieved risk recognition and measure and assessment and report and control feedback of closed ring management improve risk prevention capacity To further standardize trading and strive to achieve according to law standardize and fair Innovation of performance management to ensure that potential employees zero fly To strengthen performance management process control enhance employee evaluation and levels of effective communication to improve performance management To further quantify and refine employee standards Work full play party and branch and members in five type Enterprise construction in the of core role and fighting fortress role and pioneer model role to continues to strengthening four good leadership construction play levels cadres in enterprise development in the of backbone backbone role to full strengthening members youth work full play youth employees in company development in the of force role to improve independent Commission against corruption work level strengthening on enterprise business key link of effectiveness monitored And maintain stability To further strengthen publicity and education improve the overall legal system We must strengthen safety management establish and improve the education supervision and evaluation as one of the traffic safety management mechanism To conscientiously sum up the Olympic security controls promoting integrated management to a higher level higher standards a higher level of development Employees today is lunar calendar on December 24 the ox Bell is about to ring at this time of year we clearly feel the pulse of the XX power generation company to flourish to more clearly hear XX power generation companies mature and symmetry breathing Recalling past one another across a railing we are enthusiastic and full of confidence Future development opportunities we more exciting fight more spirited Employees let us together across 2013 full of challenges and opportunities to create a green low cost operation full of humane care of a world class power generation company and work hard The occasion of the Spring Festival my sincere wish that you and the families of the staff in the new year good health happy happy 元格内的地基预压荷载为此单元格上部荷载的 1 2 倍 计每平方米或号 3 4 承台基坑回填部位 300Mpa M2 或号等干渠外承台基坑回填土部位 2 5 200Mpa M2 3 观测及测点布置和观测 地基加载前测点标高 ho 加载后测点标高 hj 加载后间隔 24 小时 1 测点标高 hi 卸载 6 小时候测点标高 hc 每个观测断面上布点 5 个 且对称布置 预压变形观测采用水准仪 2 按照 水准仪验定规程 JJG425 进行验定 预压变形观测采用三等水准测量 要求作业 A 所有仪器必须检定合格后方可开始观测工作 B 在支架地基处理之后 预压荷载施加之前 测量记录原地面的标高 C 全部预压荷载施加完毕后 记录各测点的标高 D 每间隔 24h 观测一次 记录各测点的标高 计算前后两次沉降差 E 当地基预压符合验收规定时 认为地基沉降达到稳定 可以进行卸载 F 卸载 6h 后观测各测点标高 计算前后两次沉降差 即地基回弹量 G 计算地基总沉降量 三 支架预压三 支架预压 1 1 支架预压布置 支架预压布置 为保证支撑架预压达到预期的效果及工程进度要求 针对箱梁变截 1 面的设计特点 架体高度 施工先后顺序和地基情况的不同 全桥选取两种 代表截面各抽取一跨 支架预压工作选取左幅 轴线间一跨 宽度 3 4 20 50 米 跨度 52 米 右幅 轴线间一跨 宽度 20 50 米 跨度 25 80 5 6 We will continue to improve the company s internal control system and steady improvement in ability to manage and control optimize business processes to ensure smooth processes responsibilities in place to further strengthen internal controls play a control post independent oversight role of evaluation complying with third party responsibility to actively make use of internal audit tools detect potential management streamline standardize related transactions strengthening operations in accordance with law Deepening the information management to ensure full communication zero resistance To constantly perfect ERP and BFS and PI and MIS and SCM information system based construction full integration information system achieved information resources shared to expand Portal system application of breadth and depth play information system on enterprise of Assistant role to perfect daily run maintenance operation of records promote problem reasons analysis and system handover to strengthening BFS and ERP and SCM technology application of training improve employees application information system of capacity and level Humanistic care to ensure zero To strengthening Humanities care continues to foster company wind clear and gas are and heart Shun of culture atmosphere strengthening love helped trapped care difficult employees carried out style activities rich employees life strengthening health and labour protection organization career health medical control career against continues to implementation psychological warning prevention system training employees health of character and stable of mood and enterprising of attitude created friendly fraternity of Humanities environment To strengthen risk management ensure that the business of zero risk To strengthened business plans management will business business plans cover to all level ensure the business can control in control to close concern financial and coal electric linkage and energy saving scheduling national policy trends strengthening track active should to implementation State owned assets method further specification business financial management to perfect risk tube control system achieved risk recognition and measure and assessment and report and control feedback of closed ring management improve risk prevention capacity To further standardize trading and strive to achieve according to law standardize and fair Innovation of performance management to ensure that potential employees zero fly To strengthen performance management process control enhance employee evaluation and levels of effective communication to improve performance management To further quantify and refine employee standards Work full play party and branch and members in five type Enterprise construction in the of core role and fighting fortress role and pioneer model role to continues to strengthening four good leadership construction play levels cadres in enterprise development in the of backbone backbone role to full strengthening members youth work full play youth employees in company development in the of force role to improve independent Commission against corruption work level strengthening on enterprise business key link of effectiveness monitored And maintain stability To further strengthen publicity and education improve the overall legal system We must strengthen safety management establish and improve the education supervision and evaluation as one of the traffic safety management mechanism To conscientiously sum up the Olympic security controls promoting integrated management to a higher level higher standards a higher level of development Employees today is lunar calendar on December 24 the ox Bell is about to ring at this time of year we clearly feel the pulse of the XX power generation company to flourish to more clearly hear XX power generation companies mature and symmetry breathing Recalling past one another across a railing we are enthusiastic and full of confidence Future development opportunities we more exciting fight more spirited Employees let us together across 2013 full of challenges and opportunities to create a green low cost operation full of humane care of a world class power generation company and work hard The occasion of the Spring Festival my sincere wish that you and the families of the staff in the new year good health happy happy 米 以此两跨支架预压支架基础回弹值及整个支架的回弹值结果 作为各代 表截面跨施工预拱度设置的参考数值 以选取左幅 轴线间一跨之间支架预压为例 该跨高度最高约 2 3 4 10 米 均布荷载最大 跨中截面为支架计算所选取的最不利截面 如果该截 面的预压试验能够通过则从理论上来说其他任何截面的荷载架体均能承受 以单幅桥面横宽设置三段单元格 双边翼板设置两个单元格 中间 3 16 5 米设置一个单元格 顺桥向每 2 米设置一个单元格 2 2 预压方法 预压方法 预压前应根据箱梁高度 按照支撑架立杆的顺桥向间距计算出箱梁 1 底板 腹板 顶板的重量并附加施工荷载作为预压荷载 使堆载预压荷载不 小于支架承受的混凝土结构恒载与模板重量之和的 1 2 倍 保证预压效果 支撑架预压采用 9 米长直条钢筋作为堆载物 待箱梁底模板的主楞 2 铺放好以后铺上模板 将计算好重量的钢筋或沙包吊放在模板上 加载时从 混凝土结构跨中开始向两侧对称布载 荷载吊装前 在支架两侧 腹板下 中横梁下每间隔 3 米布置一个 3 变形观测点 支架预压按预压单元进行分级加载 且不少于 3 级 3 级加载 依次宜为 60 80 100 每级加载后先停止下一级加载 并间隔 12 小时对支架沉降量进行一 4 次观测 当支架检测点的沉降量平均值小于 2mm 时 可进行下一级加载 并 做详细记录 待全部加载后的监测中 其监测数据满足下列条件之一时 判 定支架预压合格 A 在加载过程中应密切观察支撑架的变化 如有异常立即停止加载 待 处理完毕后再进行 在加载过程中 严格模拟箱梁荷载的实际作用范围 对 We will continue to improve the company s internal control system and steady improvement in ability to manage and control optimize business processes to ensure smooth processes responsibilities in place to further strengthen internal controls play a control post independent oversight role of evaluation complying with third party responsibility to actively make use of internal audit tools detect potential management streamline standardize related transactions strengthening operations in accordance with law Deepening the information management to ensure full communication zero resistance To constantly perfect ERP and BFS and PI and MIS and SCM information system based construction full integration information system achieved information resources shared to expand Portal system application of breadth and depth play information system on enterprise of Assistant role to perfect daily run maintenance operation of records promote problem reasons analysis and system handover to strengthening BFS and ERP and SCM technology application of training improve employees application information system of capacity and level Humanistic care to ensure zero To strengthening Humanities care continues to foster company wind clear and gas are and heart Shun of culture atmosphere strengthening love helped trapped care difficult employees carried out style activities rich employees life strengthening health and labour protection organization career health medical control career against continues to implementation psychological warning prevention system training employees health of character and stable of mood and enterprising of attitude created friendly fraternity of Humanities environment To strengthen risk management ensure that the business of zero risk To strengthened business plans management will business business plans cover to all level ensure the business can control in control to close concern financial and coal electric linkage and energy saving scheduling national policy trends strengthening track active should to implementation State owned assets method further specification business financial management to perfect risk tube control system achieved risk recognition and measure and assessment and report and control feedback of closed ring management improve risk prevention capacity To further standardize trading and strive to achieve according to law standardize and fair Innovation of performance management to ensure that potential employees zero fly To strengthen performance management process control enhance employee evaluation and levels of effective communication to improve performance management To further quantify and refine employee standards Work full play party and branch and members in five type Enterprise construction in the of core role and fighting fortress role and pioneer model role to continues to strengthening four good leadership construction play levels cadres in enterprise development in the of backbone backbone