e钢筋机械连接专项施工方案

promotion of employment, form a reasonable and orderly pattern of income distribution, build a more fair and sustainable social security systems, medical and health system reform. The plenary, innovation of social governance, must focus on the maintenance of fundamental interests of the overwhelming majority of the people, maximize factors, enhance social development, improving social governance, the interests of national security, ensure that the people live and work, social stability and order. To improve social governance, stimulating social organization, innovative and effective system of preventing and resolving social conflicts, improving the public security system, set up the National Security Council, national security systems and national security strategy to ensure national security. Plenary session, the construction of ecological civilization, you must establish systems of ecological system, using the system to protect the ecological environment. To improve natural resources asset property right system and use control, red line of delimitation of ecological protection, resources paid use system and ecological compensation system in ecological environment protection management system reform. Plenary session, centering on building a listening party command, can win and having a fine style of the peoples army, a strong army under the new situation of the party Goals, restricting the development of national defense and army building is solved outstanding contradictions and problems, innovation and development of military theory, enhance military strategic guidance, improve the military strategy in the new period, building a modern military force system with Chinese characteristics. To deepen the adjustment of personnel system reform in the army, military policy and system reform, promote the development of military and civilian integration depth. Plenary session stressed that comprehensive reform must be to strengthen and improve the partys leadership, give full play to the core role of the party commands the overall situation and coordinating all parties, improving the partys leading water . Margin. Challenged the leadership of the Communist Party of China, Marxism-Leninism and Mao Zedong thought by Deng Xiao-pings flag, replaced by three representatives and the harmonic society. The former Communist Party spirit and social cohesion point of almost all political makeover. Characteristics of socialism public ownership is shifting to private ownership, planned regulation and market regulation, the proletarian regime controlled by the elite. Of universal equality, fairness and basic principles of distribution system is socialist society, however after economic monopolized by powerful, vested interests grow, employers do not have the same status, hardly seems fair social distribution. State key protection of capital interests rather than the interests of citizens, had been hits the bottom of the proletariat九珑湾广视花园B区R1#、R6#、R7#、R8#楼工程钢筋机械连接施工方案福建省吴航建筑工程有限公司二0一0年二月六日九珑湾广视花园B区R1#、R6#、R7#、R8#楼工程钢筋机械连接专项施工方案九珑湾广视花园B区R1#、R6#、R7#、R8#楼工程HRB400C28、C32钢筋采用直螺纹连接。钢筋直螺纹接头是粗钢筋接头的一种新的连接技术。它具有以下优点：1. 接头强度高。接头强度大于钢筋母材强度。2. 性能稳定。接头性能不受扭紧力矩影响，少拧2-3扣，均不会对接头强度造成明显损害。3. 连接速度快。直螺纹连接套筒比锥螺纹短40%左右，且丝扣螺距大，不必使用扭力扳手，方便施工。4. 应用范围广。对弯折钢筋、固定钢筋、钢筋笼等不能转动钢筋的场合，可不受限制地方便使用。5. 经济效益好。直螺纹接头比套筒挤压接头省钢70%左右，对锥螺纹接头省省钢35%左右。6. 便于管理。省去了用扭力扳手检测这道工序。对劳工素质及检测工具的依赖性明显减小。一、钢筋连接准备1.接头性能和质量要求所有机械连接均采用滚轧直螺纹机械连接，连接套材料采用优质合金钢制作，屈服承载力和抗拉承载力不小于被连接钢筋的屈服承载力和抗拉承载力标准值的1.10倍。连接套必须有明显的规格标识，两端应用密封盖扣紧，连接套不能有锈蚀、油脂等影响本身质量和影响砼质量的缺陷和杂质。2. 机具准备（1）剥肋滚压直螺纹机械连接机具：1）钢筋剥肋滚压直螺纹机其技术参数如下表所求：设备型号GHG50型GHG40型滚丝头型号50型40型可加工钢筋范围25501640整机质量（kg）6005902）限位挡铁：对钢筋的夹持位置进行限位，型号划分与钢筋规格相同。3）螺纹环规：用于检验钢筋丝头的专用量具。4）力矩扳手：力矩扳手的精度为5%。5）砂轮切割机：用于钢筋端面平头。（2）、用于检验钢筋丝头的专用量具：1）钢筋压接器YJQ-32（3台）：用于挤压钢筋接头。2）辅助机具：包括模具、检测工具（卡板、测深尺）。（3）、施工手续现场所有钢筋工必须具备上岗证，钢筋机械接头施工的人员必须进行技术培训，经考核合格后方可执证上岗。未经培训的人员严禁操作设备。3.钢筋下料钢筋下料用专用机床或砂轮切割机下料，切口端面应于钢筋轴线垂直，端面应平整，不得有马蹄形或挠曲。4.丝头加工加工丝头的牙形、螺纹、螺距必须和连接套的牙形、螺纹、螺距一致，有效丝段内的秃牙累计不大于半丝口周长。用相应的环规和丝头板检验。滚轮直螺纹时应用水溶性切削润滑液，不得用机油代替切削润滑液或不加润滑液直接滚轮丝头。钢筋丝头加工后应全数每个检查，检查合格后方可加工下一丝头，并填写加工记录；质检员对每批丝头随机抽查10%，并不少于10个，如发现有不合格品则全数检验；不合格的丝头应切除后从新加工。钢筋丝头一端戴上保护套，另一端拧上连接套，并按规格分类堆放，并挂牌标识。二、钢筋连接施工钢筋连接时，应核对规格、型号，并确保丝头和连接套的丝口干净、无损伤。并用力矩扳手拧紧，拧紧力矩应符合规定值，既不能过小，导至连接不到位，也不能过大，导至损伤连接件或钢筋。1、滚压螺纹加工及检验 滚压直螺纹加工直螺纹加工采用剥肋滚压加工的方法，采用GHG40型钢筋剥肋滚丝机，先将钢筋的纵肋和横肋进行剥切处理后，使钢筋滚丝前的柱体直径达到同一尺寸。然后进行滚压螺纹成型。直螺纹加工过程：将待加工钢筋夹在夹钳上，开动机器，扳动进给装置。使动力头向前移动，开始剥肋滚压螺纹，待滚压到定位装置后，设备自动停机并反转，将钢筋端退出滚压装置，扳动进给手柄将动力头复位停机，螺纹即加工完成。 螺纹加工的检验操作工人应按表II-1的要求检查丝头加工质量，每加工10个丝头用螺纹规检查一次。经自检合格的丝头，应符合下表II-1的规定。钢筋规格剥肋直径螺纹尺寸丝头长度完整丝扣圈数2826.50.2M29340103230.50.2M3334511 钢筋接头的等级本工程的钢筋直螺纹连接接头主要是筏板基础的HRB400钢筋采用，均采用级接头，接头的实际抗拉强度按如下规定控制：a、接头的抗拉强度f0mstf0st或1.10fukb、当钢筋抗拉强度实测值大于抗拉强度标准值的1.10倍时，接头试件的抗拉强度尚不应小于钢筋抗拉强度实测值的0.95倍。2、直螺纹连接用套筒、套筒的选型滚压直螺纹连接用套筒选用标准型套筒，其规格尺寸如附表所示。标准型的套筒几何尺寸(mm)规格螺纹尺寸套筒外径套筒长度28M293426632M3334875、套筒检验套筒为厂家提供产品，进场后要认真检查其规格、型号、数量是否于所需一致，牙型要用螺纹规检查。3、施工方法钢筋切割钢筋丝扣加工施工准备钢筋连接丝扣质量检查接头抽样检验验 收钢筋绑扎施工、钢筋切割和丝扣加工。钢筋切割一律采用砂轮切割机切割，禁止采用钢筋切断机切割，避免钢筋头部出现马蹄头等不规则的形状。切割时按下料控制长度，量好尺寸后即可切割，禁止气焊下料。钢筋切割后即可进行丝扣加工。丝扣加工时要使用锋利的丝刀，避免丝扣掉牙或不光滑。加工时丝刀口要加专用冷却润滑液，要保持被加工钢筋和丝刀口面呈垂直状态，加工长度较长的钢筋可用简易架子把钢筋架起来放平后加工。、丝扣加工后要进行逐个检查，看是否有秃扣、掉牙等现象，丝扣加工长度是否达到规定尺寸。不合格的，用切割机切掉后重新进行丝扣加工。、钢筋连接时要保证把钢筋的丝扣（丝头）拧入套筒螺母足够的深度，即拧入深度（长度）被连接钢筋直径的1.2倍。拧入时要用钢尺检查拧入深度。在满足拧入深度的情况下，把钢筋用扭力扳手或管钳拧紧。将两个钢筋丝头在套筒中间位置相互拧紧。接头扭紧力矩应符表II-3的规定。扭力扳手的精度为5%。附表 钢筋直螺纹连接扭紧力矩钢筋直径(mm)2832拧紧力矩(Nm)280320注：直径小于25的钢筋按25扭紧力矩控制、钢筋接头的保护层厚度宜符合现行国家标准混凝土结构设计规范GB50010中受力钢筋混凝土保护层最小厚度的规定，且不得小于15mm，连接件净距不宜小于25mm。、钢筋绑扎时，结构件中纵向受力钢筋的接头宜相互错开，钢筋机械连接区段长度按35d计算（d为被连接钢筋直径）。在同一连接区段有接头的受力钢筋截面积占受力钢筋总面积的百分率，应符合下列规定：接头宜设置在结构件受拉钢筋应力较小部位，应控制在同一连接区段内钢筋接头的百分率不大于50%.接头应避开有抗震设防要求的框架的梁端、柱端、箍筋加密区。当无法避开时，必须保证连接质量，应保证采用的是级接头，且接头百分率不应大于50%。受拉钢筋应力较小部位及纵向受压钢筋，接头百分率按设计要求确定。对直接承受动力荷载的结构件中，接头百分率不应大于50%。、已加工检验合格的钢筋接头应加以保护，戴上保护帽，并按规格堆放。、接头处（接头的端部）距钢筋的弯曲点的距离，不得少于钢筋的10倍直径(10d)。、现场截取抽样试件后，原接头位置的钢筋允许采用同等规格的钢筋进行搭接连接，或采用焊接及机械连接方法补接。4、质量检查验收、在施工现场对连接接头进行检验，检验应进行外观质量检验和抽样做单向拉伸试验，如有设计特殊要求，按设计要求做。、接头的现场检验按验收批进行检验。同一施工条件下用同一批钢材及同一型号接头连接的同等级、同型式、同规格接头，以500个为一个验收批进行检验与验收，不足500个也作为一个验收批。、钢筋连接工程开始前及施工中，应对每批进场钢筋进行接头工艺检验，并应符合下列要求：a、每种规格钢筋的接头试件不应小于3根。b、钢筋母材抗拉强度试件不应少于3根。c、3根接头的试件的抗拉强度均应符合规范的规定。、对接头的每一验收批，必须在工程结构中随机截取3个接头试件抗拉强度试验，按接头的等级进行评定。当3个接头试件的抗拉强度均符合规范的规定，该验收批评为合格。如有1个试件的抗拉强度不符合要求时，应再取6个试件进行复验，复验中如6个试件都合格，则该检验批可评为合格。如有1个试件不合格，则该验收批不合格。、直螺纹连接套筒外观质量检验应按厂方提供的标准进行重点检查如下内容：a、加工的钢筋接头的牙形，螺距必须同连接套的牙形、螺距一致。用螺纹规量测。b、钢筋螺纹接头及连接套，要求牙形饱满、无断牙、无秃牙缺陷，且与牙形规（螺纹规）的牙形吻合，牙形表面光滑洁净。c、钢筋切割断面（端头）应与钢筋轴线垂直，不得有马蹄形或挠曲，不得用切断机或气割下料。d、应对进场的连接套、钢筋加工接头（丝头）按每个规格每一验收批各抽检10%（且不少于10个）进行外观检查，如有一个不合格接头，即应对该加工批进行全数检查，不合格接头应重新加工，经再次检验合格，方可使用。e、接头不做弯曲试验。5、注意事项粗直径钢筋直螺纹连接是一项新技术，施工中应特别注意以下几个问题：、对进场的钢筋接头，连接套筒必须按批作外观及随机取样检验（抗拉试验）。、注意下料方法，必须保证钢筋端头螺纹完整，不能有缺损，不能用切断机或气割下料。、注意牙形，要使钢筋与连接套的螺纹、牙形、螺距一致，相匹配；并且牙形完整、无毛刺、光洁，决不允许使用牙形撕裂、掉牙、牙瘦等不合格接头，应对批量全数检查。、钢筋接头拧入连接套时，一定必须保证钢筋丝头进入连接套的长度大于等于规定值。、连接时必须保证接头、套筒洁净，不能夹有水泥浆等杂物。、做好相关检验记录。Obviously, face Chinas Socialist system, the Communist Party is not the party. In that case, political chaos has been very tight. Is remodeling or reconstruction, is a correction or a stove. Whether to turn right or left, is back to the source or put forward new political ideas. This is to determine the road problems in China, is also the key out of the deep water of the reform of the economic system. After 18, the new Central collective leadership attaches great importance to political orientation. First, the Central eight articles as a starting point, starting from the Central Governments self-restraint, which preaches and pro-image, brought fresh feeling to the community. Secondly, before reform and opening up and reform and opening two periods after non-negative, untying the tangle of the society a long time on this issue. Third, a new generation of party leaders on various occasions to Mao Ze-Dong and Mao Ze-Dongs thought of evaluation has room for manoeuvre, through to the ruling ideology of Mao Zedong thought, is the call of the soul to the Socialist Revolution and construction. Empty talks jeopardize national interests and try again, is an affirmation of Deng Xiao-pings reform ideas. These strong political signal showing a new generation of political leaders is still keeping to the Socialist road. Four is revisiting the talking to Mao Ze-Dongs historical cycle of high profile anti-corruption and the importance of the Constitution, reorganization is bad style of officialdom, was to civilize people obey the law, while improving the color change of the regime of vigilance. Five is to reform into deeper waters and stressed that top-level design, this is a review on the reform and opening up in the past, is also looking for a way out. Six foreign and Russia closer, the flexible attitude on the issue of the Korean peninsula, Sino-Japanese fishing hardline China on the island out of the patient and low profile shadow began to gradually plan development. Signs show that the new leadership began to make a left turn in politics. However, as of right now, not only ideological confusion in the community, the new leaderships thinking is messy. New leaders both stressed the need to implement the Constitution, stressed the need to turn off the power in a cage. Also stresses that Mao Zedong thought cannot be lost, 30 years after the reform and opening up 30 years ago can not deny each other. Both advocate democracy and release seven does not speak of files of political constraints. Neither deny the history of the CPC Central Committee on several issues .Comrades: today brings together members, mainly in order to provide a platform to Exchange and learn from each other in order to facilitate our work. Just now, we focus on taxation, planning and stability, safety, project construction, typical topics such as private facts presentation and interaction, and towns currently exist in the in-depth analysis of the problems to be solved, to explore new methods to solve the problem. It can be said that summing up the achievement, no grandstanding; analysis第 11 页 共 11 页