CFG桩施工技术标准.doc

thrift of excellent traditional and style lack deep of understanding, one-sided think in now of good situation Xia, economic smooth more fast development, and reform made major progress, and people living significantly improve, and social the career made new progress, no necessary always hard has, no awareness to China also has many poverty area, and also has many poverty population of exists, more living improve has, more need keep hard of style. Three is not strictly honest. Total thought units is a water sector, clean self-discipline away from himself too far, no real processing good living of improve and hard, and thrift excellent traditional of relationship, no effective do comply with Constitution and party of regulations must from I do up, no right mercy good bitter Le, and wealth of relationship, no right awareness to in comply with Constitution and party of regulations aspects everyone has accountability. Four, future direction and improvement measures 1, belief and faith, strengthen party spirit. One is to firmly establish the noble ideals of struggle for the ideals of communism, communist struggle for life, ready to sacrifice everything for the party and the people. Second is to continuously improve the quality and standard of political, conscientiously study Deng Xiaoping theory and three represents important thought and the scientific Outlook on development, implement the partys basic program for the primary stage of socialism, adhere to the correct political orientation, maintain highly consistent with the CPC Central Committee, is good at theories of socialism with Chinese characteristics to analyze and solve problems. Third, strengthening the party spirit and the world transformation, perseverance of the party Constitution, relive Party vows to establish correct world Outlook, Outlook on life and the world, practically embodies ideals and beliefs into action, combine lofty ideals and practical activities, transforming the objective world, actively participate in the great practice of building socialism with Chinese characteristics. 2, keep the purpose in concept, changing the style of work. First, keep in mind that the purpose of serving, adhere to assuming power for the people, keep in mind the people and care about people, and the joys and sorrows of the masses, .According to city discipline, and municipal organization Department requirements, today we held implement implementation independent Commission against corruption guidelines effective strengthening led cadres style construction topic democratic life, main task is close contact thought, and work actual, control check district Standing Committee team and the personal in implementation independent Commission against corruption guidelines Shang exists of problem, in-depth carried out criticism and self-critical, further clear rectification direction and measures, effective enhanced clean politics of consciousness and initiative, firm set good of ruling image. Before the meeting, the way we take surveys solicited a views, combed, related to team buildingCFG桩施工技术标准1、材料及检验 根据设计及规范要求，确定原材料的种类及品质，并将原材料送至试验室进行化验和做水泥粉煤灰混凝土配合比试验。根据选定的配合比，经监理工程师同意后材料进场，根据现场实际情况，选用材料。2、 CFG桩桩位编号及施打顺序 根据设计图纸对桩位,按排列逐根编号,如Z1-1,Z1-2,Z1-3，并在施工时，按布置图做好标识，以防因桩位过多而漏打或超打。 在选定CFG桩施工顺序时，主要应根据土性和桩距，充分考虑新打桩对已打桩的影响。施工顺序大体可分为两种类型，一是连续施打，如图1（1）所示，从1号桩开始，依次2号，3号连续打下去；二是间隔跳打。可以隔根或隔行跳打，如图1（2）所示，先打1、3、5，后打2、4、6。(1) O 0 O O O O 1 2 3 4 5 6(2) O 0 O O O O 0 1 2 3 4 5 6 7图1 CFG桩施打顺序图连续施工打桩可能给桩造成的缺陷是桩被挤扁或缩颈，但很少会发生因振动使桩完全断裂的情况。隔桩跳打，一般很少发生先打桩的桩径被挤扁或缩颈现象，但土质较硬时，在已打桩中间打新桩时，已打的桩可能因振动而发生断裂。在软土CFG桩施工中，可采用隔桩跳打；在饱和的松散粉土中，如果桩距较小则不宜采用隔桩跳打。因为松散粉土振密效果较好，先打桩施工完后，土体密度越大，桩越难打。在补打新桩时，一是加大了沉管的难度，二是非常容易造成已打的桩成为断桩。 本工程应根据实际情况，按照桩基施工规范要求，结合施工方提出的施工方案，再进行决定施打顺序。3、工艺流程 1）CFG 桩复合地基技术采用的施工方法有：长螺旋钻孔灌注成桩，长螺旋钻孔、管内泵压混合料灌注成柱，振动沉管灌注成桩等。 2）工艺流程： 桩位放线桩机就位调整桩机垂直度确定钻进深度标识润湿泵管成孔至设计标高泵送CFG桩混合料至设计标高清理桩间土凿桩头桩身质量检验铺设辱垫层 砂石垫层工艺流程：检验砂石质量分层铺筑砂石洒水找平、夯实或碾压分项验收 单桩施工工艺流程： 钻机就位钻孔终空至设计深度压灌混凝土提钻并压灌砼至孔口4、 施工要点 1）施工前应按设计要求由试验室进行配合比试验，施工时按配合比配制混合料。长螺旋钻孔、管内泵压混合料成桩施工的坍落度宜为160200mm，振动沉管灌注成桩施工的坍落度宜为3050mm，振动沉管灌注成桩后桩顶浮浆厚度小于200mm。 2）桩机就位，调整沉管与地面垂直，确保垂直偏差不大于1；对满堂布桩基础，桩位偏差不应大于0.4 倍桩径；对条形基础，桩位偏差不应大于0.25 倍桩径，对单排布桩桩位偏差不应大于60mm。 3）控制钻孔或沉管入土深度，确保桩长偏差在100mm 范围内。 4）长螺旋钻孔、管内泵压混合料成桩施工在钻至设计深度后，应准确掌握提拔钻杆时间，混合料泵送量应与拔管速度相配合，遇到饱和砂土或饱和粉土层，不得停泵待料；沉管灌注成桩施工拔管速度应按匀速控制，拔管速度应控制在1.21.5mmin 左右，如遇淤泥土或淤泥质土，拔管速度可适当放慢。 5）施工时，桩顶标高应高出设计标高，高出长度应根据桩距、布桩形式、现场地质条件和施打顺序等综合确定，一般不应小于0.5m。 6）成桩过程中，抽样做混合料试块，每台机械一天应做一组（3 块）试块（边150mm立方体），标准养护，测定其立方体28d 抗压强度。 7）冬期施工时混合料入孔温度不得低于5，对桩头和桩间土应采取保温措施。 8）清土和截桩时，不得造成桩顶标高以下桩身断裂和扰动桩间土。 9）褥垫层厚度宜为150300mm，由设计确定。施工时虚铺厚度（h ）:h= H/ 其中为夯填度，一般取0.870.90。虚铺完成后宜采用静力压实法至设计厚度；当基础底面下桩间土的含水量较小时，也可采用动力夯实法。对较干的砂石材料，虚铺后可适当洒水再进行碾压或夯实。5、质量标准 1）水泥、粉煤灰、砂及碎石等原材料应符合设计要求。 2）施工中应检查桩身混合料的配合比、坍落度和提拔钻杆速度（或提拔套管速度）、成孔深度、混合料的灌入量等。 3）施工结束后，应对桩顶标高、桩位、桩体质量、地基承载力以及褥垫层的质量做检查。 4） CFG 桩复合地基的质量检验标准应符合水泥土粉煤灰碎石桩复合地基质量验收标准的规定。水泥粉煤灰碎石桩复合地基质量检验标准项序检 查 项 目允许偏差或允许值检 查 方 法单位数 值主控项目1原材料设计要求查产品合格证书或抽样送检2桩径mm-20用钢尺量或计算填料量3桩身强度设计要求查28d试块强度4地基承载力设计要求按规定的办法一般项目1桩身完整性按桩基检测技术规范按桩基检测技术规范2桩位偏差满堂布桩0.40D条基布桩0.25D用钢尺量，D为桩径3桩垂直度%1.5用经纬仪测桩管4桩长mm+100测桩管长度或垂球测孔深5褥垫层夯填度0.9用钢尺量注：1、夯填度指夯实后的褥垫层厚度与虚体厚度的比值。 2、桩径允许偏差负值是指个别断面。6、成品保护 1）CFG 桩施工时，应调整好打桩顺序，以免桩机碾压已施工完成的桩头。 2）CFG 桩施工完毕后，待桩体达到一定强度后（一般为37d），方可进行开挖。开挖时，宜采用人工开挖，如基坑较深、开挖面积较大，可采用小型机械和人工联合开挖，应有专人指挥，保证铲斗离桩边应有一定的安全距离，同时应避免扰动桩间土和对设计桩顶标高以下的桩体产生损害。 3）挖至设计标高后，应剔除多余的桩头，剔除桩头时应采取如下措施： 找出桩顶标高位置，在同一水平面按同一角度对称放置2 个或4 个钢钎，用大锤同时击打，将桩头截断。桩头截断后，再用钢纤、手锤等工具沿桩周向桩心逐渐剔除多余的桩头，直至设计桩顶标高，并在桩顶上找平。 不可用重锤或重物横向击打桩体。 桩头剔至设计标高，桩顶表面应凿至平整。 桩头剔至设计标高以下时，必须采取补救措施。如断裂面距桩顶标高不深，可接桩至设计标高，同时保护好桩间土不受扰动。 4） 保护土层和桩头清除至设计标高后，应尽快进行褥垫层的施工，以防桩间土被扰动。 5）冬期施工时，保护土层和桩头清除至设计标高后，立即对桩间土和CFG桩采用草帘、草袋等保温材料进行覆盖，防止桩间土冻涨而造成桩体拉断，同时防止桩间土受冻后复合地基承载力降低7、安全环保措施 1） 安全生产注意事项 机械设备操作人员（或驾驶员）必须经过专门训练，熟悉机械操作性能，经专业管理部门考核取得操作证或驾驶证后上机（车）操作。 机械设备操作人员和指挥人员严格遵守安全操作技术规程，工作时集中精力，谨慎工作，不擅离职守，严禁酒后驾驶。 机械设备发生故障后及时检修，决不带故障运行，不违规操作，杜绝机械和车辆事故。 专业电工持证上岗。电工有权拒绝执行违反电器安全规程的工作指令，安全员有权制止违反用电安全的行为，严禁违章指挥和违章作业。 所有现场施工人员佩戴安全帽，特种作业人员佩戴专门的防护用具。 所有现场作业人员和机械操作手严禁酒后上岗。 施工现场所有设备、设施、安全装置、工具配件以及个人劳保用品必须经常检查，确保完好和使用安全。 施工现场的一切电源、电路的安装和拆除必须由持证电工操作；电器必须严格接地、接零和使用漏电保护器。各孔用电必须分闸，严禁一闸多用。孔上电缆必须架空2.0m 以上，严禁拖地和埋压土中，电缆、电线必须有防磨损、防潮、防断等保护措施。照明应采用安全矿灯或12V 以下的安全灯。并遵守施工现场临时用电安全技术规范（JCJ46-88）的规定。 2） 环保措施 易于引起粉尘的细料或松散料运输时用帆布、盖套等遮盖物覆盖。 施工废水、生活污水不直接排入农田、耕地、灌溉渠和水库，不排入饮用水源。 食堂保持清洁，腐烂变质的食物及时处理，食堂工作人员定期体检。 受工程影响的一切公用设施与结构物，在施工期间应采取适当措施加以保护。 使用机械设备时，要尽量减少噪声、废气等的污染；施工场地的噪声应符合建筑施工场地界噪声限值（GB l2523-1990）的规定。 运转时有粉尘发生的施工场地，如水泥混凝土拌和机站等投料器应有防尘设备。在这些场地作业的工作人员配备必要的劳保防护用品。 驶出施工现场的车辆应进行清理，避免携带泥土。8、施工中易出现的问题及处理措施 1）对于满堂布桩，无论桩距大小均不宜从四周转圈向内排进施工。因为这样限制了桩间土向外的侧向变形，容易造成大面积土体隆起，增大断桩的可能性。施工时可采用从中心向外推进的方案或从一边向另一边推进的方案。另外，在施工时要时刻观察地表概况，如发生地表隆起应停止施工，寻找原因。2）缩颈、断桩现象及预防措施.桩的施工顺序与拔管速度是产生缩颈与断桩的主要因素。在饱和软土中成桩，桩机的振动力较小，这时若采用连打作业，新打桩对已成桩的作用主要表现为挤压，使已成桩被挤成不规则形，严重的会产生缩颈和断桩。在上部有较硬的土层或中间夹有硬土层的土中成桩。当采用隔桩跳打工艺时，若已打桩硬结强度不太高，在中间打新桩时，已打桩有时被振断裂。.在成桩时如果拔管速度太快，会导致混凝土自重压力对周围淤泥压力的抵抗力减少而造成缩颈或断桩；而拔管速度太慢，则会使得桩的端部桩体水泥含量较少，桩顶浮浆过多，而且混凝土产生离析，造成桩身强度不均匀。由此可见，根据施工地质情况，选择合理的施打顺序及拔管速度是防止缩颈及断桩的有效方法。考研复试面试不用担心，凯程考研有系统的专业课内容培训，日常问题培训，还要进行三次以上的模拟面试，还有对应的复试面试题库，你提前准备好里面的问题答案，确保你能够在面试上游刃有余，很多老师问题都是我们在模拟面试准备过的。project work, cadres, cadres selection and other aspects of a total of 19, further defined the direction of rectification, enhancing the pertinence and effectiveness of democratic life. Good for this meeting, we requested the Standing Committee of the municipal party Committee, municipal Secretary General Tang Wenjin, the City Commission for discipline inspection Standing Committee Yang Xu, Jiang Jixue, Deputy Director of the personnel office, and other leading comrades present guidance allows us to warm applause for their welcome and thanks! Below, I first District Committee member of the 20XX team annual democratic meeting implementation of the corrective measures, as well as member of the team and of my own report guidelines for the implementation of the independent Commission against corruption statement invited leaders and comrades criticism. First, annual party on the 20XX team, Member of democratic life action plan implementation year 20XX, district democratic meeting a member of the team on study and practice the scientific Outlook on development theme, find a project supporting strong enough, the industry well enough, urban construction management level needs to be improved, livelihood improvement needs to be strengthened, district team itself, such as the five aspects. Year of 20XX, we find out the problems mentioned above, based on actual Shunqing construction and development, conscientiously sum up improvements, achieving significant development results and effectiveness of their work. (A) highlight the project handle, maintain high growth of investment. Adhere to the strategy as a Foundation, carrying out projects to promote increased stamina important. One is to increase the intensity of projects towards. Actively seek national and provincial policy support, superior special transfer payments, a variety of additional income will top 700 million Yuan, a number of key infrastructure projects, livelihood projects, industrial projects into the cage. Second, increasing the project attracts. This year a total of 23 signed a major project, of which 14 billion project, China Metallurgical group, vanke group, Guangdong hengda group, Taiwan Ruentex group, on the RI group, Shenzhen Kaisa, jifeng agricultural machinery, Mercedes-Benz, Audi 4S store and other large enterprises and projects have settled in Shunqing. Third, strengthen project construction. Annual implementation focus project 39 a, fixed assets investment total will breakthrough 12 billion yuan, created district yilai history high, South door dam, and five in shop old city transformation, and Ying China industrial concentrated district construction, and city main road construction, and Northeast steam Trade Center, and modern farmers industry Park, and vocational education city, and low rental, and also room construction, and features blocks build, and farmers market transformation, and rural version Street transformation, focus engineering speed up implementation, effectiveness obviously. Expected to be achieved this year, area-wide GDP 17 billion