水平钢筋窄间隙焊施工工关艺大全

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1、videoconference, Secretary of the provincial Committee of Xia Baolong stressed: this year is the five water treatment 357 timetables for three years to resolve outstanding issues, obviously worked, victory of the year. The Countys departments at all levels must firmly establish the guanghui is gold

2、and silver green development concept, convinced that Castle is not relaxed, always maintaining strategic ability and strong determination to improve the environment, consistently playing well five water treatment of winning the war, ever-higher levels of comprehensive well-off society was built. (A)

3、 lay the sewage uphill battle. This year we will river water quality improved at the county level, up to five this basic objective grasp of pollution control that focus, with the focus on three things: a good job, clear rivers reaching the County created. Organization look back special inspection, t

4、he County garbage River, black and odorous River is Dragnet investigation, timely rectification of problems found in place firmly to prevent river pollution rebound. In accordance with the one-stop strategy, improving the inferior five water quality monitoring stations work this year to ensure the E

5、limination of 1 provincial control, five water quality section 3 municipalities controlled deterioration, ensure the creation this year of clear rivers standards. Second, pay special attention to pollution-cutting construction of nanotubes. Intercepting nanotubes are the basis of pollution of water

6、source engineering, engineering, matter of success or failure of water management. Urban sewage treatment, to improve effluent from sewage treatment rate, running accuracy, compliance requirement, speed up the towns support network construction, is focusing on nanotubes home last meters question. Do

7、mestic sewage treatment in rural areas, this year is the final year of the three-year action, determination to fight and the momentum around, ending the battle on which fully to ensure the realization of all County 648 formed village coverage. Also, be sure to attach importance to focus on rural dom

8、estic wastewater treatment facility operation and management, ensure that wastewater treatment facility up and running, role play, avoid the Sun problem. Third, pay special attention to the River Lake pond desilting operation. Provinces now have focused on pollution control of water go to dig up mud

9、, as the deepening water of this years plays. Next, to jump-start an investigation line touches work, implementation plan according to the priorities and the programme of work, in accordance with the one river one policy requires detailed cleaning, dredging plan, planning ahead of time cleaning out

10、mud way out, according to local conditions to do sludge, promote scientific resource utilization of silt and mud. (B) the heavy regulation of heavily polluting industries. Pollution of water must grab the source, wastewater is primarily the source of backward production capacity, increase the intens

11、ity of本文由 天津热线 原创发布水平钢筋窄间隙焊施工工艺大全1 范围 本工艺标准适用于工业与民用建筑现浇钢筋混凝土结构中直径20mm及以上的热轧、级钢筋的现场水平连接。2 施工准备 2.1 材料及主要机具： 2.1.1 钢筋：钢筋的级别、直径必须符合设计要求，有出厂证明书及复试报告单。进口钢筋还应有化学复试单，其化学成分应满足焊接要求，并应有可焊性试验。 2.1.2 焊条：焊条的牌号应符合设计规定。如设计无规定时，应符合表4-17的要求，焊条质量应符合以下要求： 钢筋电弧焊使用的焊条牌号 表4-17项 次钢 筋 级 别窄 间 隙 焊123级级级E5003E5016E6016D1 注：不含

12、余热处理级钢。 2.1.2.1 药皮应无裂缝、气孔、凹凸不平等缺陷，并不得有肉眼看得出的偏心度。 2.1.2.2 焊接过程中，电弧应燃烧稳定，药皮熔化均匀，无成块脱落现象。 2.1.2.3 焊条必须根据焊条说明书的要求烘干后才能使用。 2.1.2.4 焊条必须有出厂合格证。 2.1.3 主要机具 2.1.3.1 焊接电源：焊接电源可采用市场上的定型产品，其容量大小应能获得300A电流，空载电压应为75V及以上。 2.1.3.2 U形铜模：U形铜模是由铜模、限位支座、固紧装置组成的专用模具。U形铜模可用紫铜板压制或铜棒加工而成，也可用电解铜浇铸后经少许加工而成。铜模大小应与被焊钢筋直径相适应。一

13、种铜模只宜用于相近的两种直径钢筋焊接。铜模应具有一定的厚度和体积。 2.1.3.3 其它机具：焊接电缆、电焊钳、面罩、垫子、钢丝刷、无齿锯等。 2.2 作业条件： 2.2.1 焊工必须持有有效的考试合格证。 2.2.2 接头位置应符合规定。 2.2.3 电源应符合要求。 2.2.4 作业场地应有安全防护设施，以及防火和必要的通风措施，防止发生烧伤、触电、中毒及火灾等事故。 2.2.5 熟悉图纸，做好技术交底。3 操作工艺 3.1 工艺流程检查设备选择焊接参数试焊作模拟试件送试确定焊接参数施焊质量检验 3.2 检查电源、弧焊机及工具：焊接地线应与钢筋接触良好，防止因起弧而烧伤钢筋。 3.3 选择

14、焊接参数：根据钢筋直径，参照表4-18选择焊接参数。 水平钢筋窄间隙焊焊接参数 表4-18钢筋直径 (mm)间隙大小 (mm)焊条直径 (mm)焊接电流 (A)2010123.21001102210123.21001102512144.01501602812144.01501603212144.01501603613155.02202304013155.0220230 3.4 试焊、做模拟试件：在每批钢筋正式焊接前，应焊接3个模拟试件做拉力试验，经试验合格后，方可按规定的焊接参数成批生产。 3.5 施焊操作要点： 3.5.l 钢筋端面应较平整，端面和轴线垂直。钢筋应用无齿锯或气压焊专用的切断机

15、切割。钢筋被焊部位的铁锈、油污及水分需清除干净。 3.5.2 钢筋用紧固装置固定牢固，铜模两侧轴心应一致，以防止接头出现轴线偏移或弯折缺陷。 3.5.3 钢筋窄间隙焊接时，工艺过程如下：第一步，焊条插入间隙底部一侧的钢筋端面引燃电弧，并充分熔透钢筋端面下口和使熔池金属超过1/2的间隙。接着，电弧移至间隙底部另一侧的端面。重复上述的施焊动作。必要时，还要交替施焊，及时使熔池金属连成一体，完成打底焊缝的焊接。第二步，焊条在间隙中左右前后运弧，连续施焊，使熔敷金属逐渐填充间隙端4/5高度。第三步，焊至4/5的焊缝厚后，焊缝逐渐扩宽，必要时，改连续焊为断续焊，避免过热。焊缝余高不宜超过3mm，且应平缓

16、过渡至钢筋表面。 3.5.4 拆去铜模。根据气温决定拆模时间。夏季焊完3min后可拆模，冬期为5min后拆模。10以下还要覆盖弧形铁皮盖板或岩棉板保温。过早拆模会使焊缝失去保温，接头变脆。 3.6 质量检查：在焊接生产中焊工应认真逐个接头进行自检，如发现质量缺陷，应查找原因及时消除，不合格又无法补救的接头，应切除热影响区后重焊。4 质量标准 4.1 保证项目： 4.1.1 钢筋的品种和质量，焊条的牌号、性能，必须符合设计要求和有关标准的规定。 注：进口钢筋需先经过化学成分检验和焊接试验，符合有关规定后方可焊接。 检验方法；检查出厂证明书和试验报告单。 4.1.2 钢筋的规格、焊接接头的位置，同

17、一区段内有接头钢筋面积的百分比，必须符合设计要求和施工规范的规定。 检验方法：观察或尺量检查。 4.1.3 窄间隙焊接头的力学性能检验必须合格。 力学性能检验时，从每批接头中随机切取3个接头做拉伸试验；根据工程需要，也可另取3个接头做弯曲试验。 在工厂焊接条件下，以300个同接头型式、同钢筋级别的接头为一批。 在现场安装条件下，每一至二楼层中以300个同接头型式、同钢筋级别的接头作为一批，不足300个时，仍作为一批。 检验方法：检查焊接试件试验报告单。 4.2 基本项目：水平钢筋窄间隙焊接头应逐个进行外观检查，结果应符合下列要求： 4.2.1 接头处焊缝应饱满，不得有裂纹，不得有深度大于0.5

18、mm的咬边。 4.2.2 接头处的轴线偏移不得超过0.1倍钢筋直径，同时不大于2mm。 4.2.3 接头处的弯折不大于4。 4.2.4 接头的焊缝余高为23mm。 4.2.5 焊缝气孔及夹渣的数量和大小在全部焊缝表面上不超过2个和6mm2。 外观检查不合格的接头，经修整或补强后可提交二次验收。不行格又不能补救的接头，应切除热影响区后重焊。 检验方法：目测或量测。5 成品保护 注意对已绑扎好的钢筋骨架的保护，不乱踩乱拆，不粘油污，在施工中拆乱的骨架应认真修复，保证钢筋骨架中各钢筋位置正确。6 应注意的质量问题 6.1 应采取尽可能短的电弧施焊，避免产生气孔缺陷。 6.2 焊接电流的大小对焊缝有直

19、接影响，电流偏大会使焊缝过热产生脆性组织，电流偏小会产生气孔、夹渣、未焊透等缺陷。故施焊时要选择合适的电流，并保持电流稳定。 6.3 焊条对质量的影响很大，应采用合格的焊条。焊接、级钢筋，采用的焊条属低氢型碱性焊条，焊前，焊条需按说明书的要求烘焙，并放在保温筒中备用。保温筒带入工地后接到电焊机上，保持筒内温度为150。电焊条应用1根取1根，对变冷的焊条可再烘一次，但不可烘焙第3次。 6.4 雨天、雪天和大雾天不允许露天焊接。 6.5 在环境温度低于-5的条件下进行焊接时，为钢筋低温焊接，低温焊接时，焊接电流应略为增大。7 质量记录 本工艺标准应具备以下质量记录： 7.1 钢筋出厂质量证明书或试

20、验报告单。 7.2 钢筋机械性能试验报告。 7.3 进口钢筋应有化学成分检验报告和可焊性试验报告。国产钢筋在加工过程中发生脆断、焊接性能不良和机械性能显著不正常的，应有化学成分检验报告。 7.4 钢筋接头拉伸试验报告。 7.5 焊条出厂合格证。treatment of heavily polluting industries. According to municipal, and municipal government deployment of seven big heavy pollution industry regulation three years action plans,

21、requirements to December 2016 end of Qian, all included shut stopped eliminated of enterprise all shut stopped eliminated in place; June 30, 2017 Qian, all included place regulation upgrade and agglomeration restructuring of enterprise by unified standard regulation in place, late not standard of en

22、terprise are implementation discontinued; June 30, 2018 Qian, all intends Park production of enterprise relocation Park in place, late not Park of are discontinued. In the process of renovation, will focus on four aspects: to firmly close the high energy consumption and heavy pollution, hopeless ent

23、erprise governance and production lines, eliminated a number of yearly emission intensity, low value-added products of backward production capacity. Second, we must strictly enforce the space, total project Trinity environment access system, promoting industry access and environmental conditions of

24、access of enterprises to the Park, industrial park, in principle, no longer the class on the new project. Thirdly, promoting replacement and reconstruction of heavily polluting industries, mergers and reorganizations, guide enterprises to energy conservation, recycling and low-carbon and clean produ

25、ction, and improve the level of green development. Four to establish a long-term supervision mechanism, increase the intensity of special inspections, investigate and punish the rectification is not in place, normal business of running anti-pollution installations do not. (Iii) linkage to promote fl

26、ood control water, drainage, water supply, improving water saving. Speed up cross Yang support river dike reinforcement, and along Pu seawall except insurance reinforcement, and Lake Qian sluice, and BA Cao sluice, and cloud cover reservoir, focus flood control drainage engineering construction, vig

27、orously implementation strong library solid di spread row engineering, increased geological disaster hidden points governance efforts, solid advance small basin torrent disaster governance, efforts from essentially solution basin sex, and regional flood control drainage capacity insufficient of prob

28、lem. Vigorously implement the piers, algae and other water sources protection and, promoting rural drinking water safety projects, setting up water pricing reform and environmental protection mechanism, guiding water depth. Further soil pollution and repair, strengthen agricultural non-point source

29、pollution prevention, mountain, water, forests, fields, lakes, various elements mutual long. Four, manage to tighten control, to play three to split battle. Xia Baolong, Secretary of provincial party Committee stressed that while the three to split operation time is over three years, but three to split must continue to catch on, and resolve a split cannot be changed. All localities and departments to the village and no unauthorised created本文由 海门论坛 原创发布