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1、 钢筋等强滚轧直螺纹连接技术摘要：为降低钢筋连接的施工难度，提高工作效率和节约施工成本，在尼尔基水利枢纽厂房工程挡水坝段的钢筋施工中，采用了钢筋等强滚轧直螺纹连接的新技术，提高了现场工作效率，降低了施工人员的劳动强度，并积累了丰富的施工经验。 关键词：钢筋 强滚 轧直 螺纹 连接 技术 1 概述在尼尔基厂房工程挡水坝段施工中，为提高施工工艺和施工质量，增加施工科技水平，在对钢筋传统焊接和钢筋机械连接的所用材料单位、单位人员、施工进度等方面做了反复的比较后，项目部决定采用较为先进的钢筋机械连接技术。并且在对钢筋机械连接中的几种连接接头做了研究比较后，最终决定使用与传统焊接方式相比较，具
2、有较为明显的接头强度高、连接速度快、应用范围广、适应性强、经济成本低的钢筋等强滚轧直螺纹连接技术。钢筋等强滚轧直螺纹连接标准型钢筋接头见图1 2 钢筋等强滚轧直螺纹连接技术直螺纹套筒连接是通过钢筋端头特制的直螺纹和直螺纹套管咬合形成整体的一种连接方式。可根据需要制作直径为1640的钢筋直螺纹连接套，连接套的规格及尺寸见表1。连接套制作材料用45号优质碳素结构钢或其它经试验确认符合要求的钢材。连接套的屈服承载力和抗拉承载力不小于被连接钢筋屈服承载力和抗拉承载力标准值的1.10倍。接头的性能符合钢筋机械连接通用技术规程JGJ-107-96A级接头性能的规定。表1 连接套外形尺寸单位:mm规格(d)
3、螺距(p)长度(mm) 外径(mm)螺纹小径(mm)1f162.545f25f14.8f182.550f29f16.7f202.554f31f18.1f222.560f33f20.4f25364f39f23.0f28370f44f26.1f32382f49f29.8f36390f54f33.7f40395f59f37.62.1 术语.直螺纹丝头(简称丝头)：滚轧成直螺纹的钢筋连接端。.钢筋滚轧直螺纹接头：将钢筋的连接端用专用机床滚轧成直螺纹丝头，通过直螺纹连接套把两根带丝头的钢筋连接成一体的钢筋接头。.直螺纹连接套(简称连接套)：带有内直螺纹的钢筋连接套。.秃牙：钢筋滚轧的螺纹牙顶低于中径的螺
4、牙。.有效丝扣：螺纹的螺牙中径达到合格几何尺寸的部位。2.2 工艺流程钢筋滚轧直螺纹连接的工艺流程为：钢筋原料切头机械加工(丝头加工)套丝加保护套工地连接。.所加工的钢筋应先调直后再下料，切口端面与钢筋轴线垂直，不能有马蹄形或挠曲。下料时，不得采用气割下料。.加工丝扣的牙形，螺纹必须与连接套的牙形、螺距一致，有效丝扣内的秃牙部分累计长度小于一扣周长的1/2。.已加工完成并检验合格的丝头要加以保护，钢筋一端丝头戴上保护帽，另一端拧上连接套，并按规格分类堆放整齐待用。.钢筋连接时，钢筋的规格和连接套的规格一致，并确保丝头和连接套的丝扣干净、无损。2.3 钢筋等强滚轧直螺纹连接技术优点.接头强度高：
5、等强级接头，100%发挥钢筋强度，能达到钢筋机械连接通用技术规程(JGJ-107-96)中A级接头标准。.连接速度快：套筒短，螺纹扣数少，使用方便。连接时将套筒套在钢筋上用普通扳手拧紧即可，大大降低劳动强度，节约时间。.应用范围广：适用钢筋任何位置与方向的连接，也可用于弯曲钢筋及钢筋笼不能转动的场合。.适用性强：接头质量可靠，现场施工时，风、雨、停电状态，水下、超高环境均适用。.节材、节能、经济：在同等级的钢筋连接中，比传统焊接节省连接用钢材60%左右。.适应环保要求：施工中无明火，在易燃、易爆、高处等施工条件下尤为安全可靠，可全天候施工。 3 质量要求和检验3.1 质量要求.丝头：牙形饱满，
6、牙顶宽度超过0.6mm，秃牙部分累计长度不应超过一个螺纹周长。外形尺寸含螺纹直径及丝头长度应满足图纸要求。.套筒：套筒表面无裂纹和其它缺陷，外形尺寸包括套筒内螺纹直径及套筒长度应满足产品设计要求。.连接：连接是要确保丝头和连接套的丝扣干净、无损。被连接的两钢筋断面应处于连接套的中间位置，偏差不大于1p（p为螺距），并用工作扳手拧紧，使两钢筋端面顶紧。3.2 质量检验加工人员加工时逐个目测丝头的加工质量。检查标准应符合表2中的规定。每加工10丝头应用相应的环规和丝头卡板检测1次，并剔除不合格产品。自检合格的丝头，再由质检人员对每种规格加工的丝头随机抽样检验，以一个工作班生产的丝头为一个检验批随机
7、抽样10，且不得少于10个，按表2作钢筋丝头质量检查。如有一个丝头不合格，应加倍抽检，复检仍有不合格丝头时，即应对该批全数检查，不合格的丝头应切去重新加工，经再次检验合格后方可使用。已检验合格的丝头应戴上塑料帽或连接套和保护塞加以保护。表2 丝头检验标准单位:mm项目量具名称要 求外观质量目测牙形饱满，牙顶宽度0.6mm，秃牙部分累计长度不应超过一个螺纹周长。 丝头长度卡尺钢筋丝头螺纹的效旋合长度用专用丝头卡板检测，标准型接头的丝头长度公差为+1p，见图2.螺纹中径通端螺纹环规 止端螺纹环规通环规能顺利旋入整个有效扣长度，而止环规旋入丝头的深度不大于3p（p为螺距）。见图3.4 引用
8、的规范标准JGJ-107-96钢筋机械连接通用技术规程；Q/BSJJ06-2000钢筋滚轧直螺纹接头技术规程。5 结语作为一项科技进步推广项目，在尼尔基发电厂房施工中推行的钢筋等强滚扎直螺纹接连技术的使用，提高了尼尔基发电厂房工程的施工科技含量，提高了现场工作效率，降低了施工人员的劳动强度，加快了厂房施工进度，增加了现场文明施工的水平。同时，由于钢筋等强滚扎直螺纹接连技术在钢筋连接中的使用，减少了现场施工中人为因素对钢筋连接质量的影响，将质量中不易控制的人为因素降到最低，有效的提高了钢筋连接的质量。此项技术在尼尔基发电厂房施工中推广使用为在以后的施工中积累了丰富的施工经验，并且极大地提高了施工
9、工艺水平。/Porganization system and working mode, the selection of a number of municipal strengthening group to build innovation and strengthen the organization of the basic level organizations advanced model.(seven) the manual work of the Communist Youth League Organization published and League branch o
10、f manual work, to promote the use of two manuals in the citys organizations at various levels. The county committee, directly under the group (work) is under the jurisdiction of grassroots League and group (total) using branch ratio shall not be less than 70%.Three, to further strengthen the groups
11、leadership and team building(a) to strengthen the leagues leadership at all levels of construction. Continue to do a good job of municipal Party Committee Organization Department on the strengthening of the Communist Youth League cadres management opinions implementation. To promote the group counti
12、es (autonomous counties, cities) Commission and city directly under the group (workers) appointed to carry out the Five team building activities. Improve the League Association Department working mechanism. Conscientiously fulfill the duties of CO, combined with the city group directly under (the) C
13、ommittee of the general election and the adjustment, actively jointly with the unit where the party organization department good group leadership selection with the work. Do a good job in municipal Party committee assistant committee leadership and leading cadres of the annual assessment work, adher
14、e to and improve the assistant secretary of the Communist Youth League talk system group To weave individual conversation and collective conversation, to strengthen the committees of all levels, the Standing Committee of the Standing Committee, the establishment of a sound system of central group le
15、arning, the system of investigation and study, the system of important issues and the reporting system.(two) to strengthen the work of education and training of cadres to conscientiously implement the Central Committee. On the implementation of grassroots cadres training project and opinions on carr
16、ying out the mission municipal CYL Cadres training project implementation opinions, full implementation of the project of the City Youth League cadres training education. Focus on the county grassroots cadres and workers focused on training, the new school system vocational training League cadres, f
17、or the Municipal Organization Department jointly held the third session of the Communist Youth League system training cadres in party. Focusing on the construction of new socialist countryside, strengthening village cadres and rural construction team group member of the young team, the county organi
18、zations at various levels throughout the year is expected to train 100 00 rural grassroots cadres, plans to train 1000 village secretary of the village Party branch.(three) actively promote grassroots cadres election work. Under the unified leadership of the party organization, to strengthen grassro
19、ots organizations direct work, standardize the election work rules and procedures, in the designated candidate, open competition to democratically elected branch secretary at the same time, actively and steadily the development of Township, streets and other grassroots organizations in the direct el
20、ection of the pilot work, on the basis of summarizing the experience and gradually expand the scope of the pilot, and gradually formed a set of measures and cadres election system.(four) to strengthen the cadres testing exercise. To study the development of XX city from 2006 to 2008 cadres testing e
21、xercise planning. To select outstanding cadres to the central mission in Beijing, Shanghai, Guangzhou and other central organs and sending work in developed areas. With the Central Committee the implementation of the western region and ethnic minorities cadres training plan . To carry out the eighth
22、 batch of municipal organs attachment cadre management, selection, training work. The outstanding cadres to start the National Development Bank XX branch testing exercise.(five) to strengthen the group construction. The main position to play the role of Youth League cadre education and training as t
23、he city, in accordance with the requirements of post training, further curriculum scientifically and rationally, adopt arrangement menu course, basic theory includes group work, focus, hot and difficult issues, to enhance the content and practice; to strengthen the construction of teaching staff, th
24、e integration of teachers, establish a quality teacher training team, establish and implement course evaluation system; take delivery of training to the countryside, on-site training, and increase the rural grassroots cadres training efforts.Four, efforts to strengthen the work of young talent(a) to
25、 tenth XX young 54 medal in recognition of the publicity, and actively explore the XX youth service. 54 Medal of institutionalization, standardization and socialization mechanism. Give full play to the XX award in recognition of 54 youth medal Association, Youth Award winner in the 54 chapter, inves
26、tigation activities. Who won the Youth Service medal, dedication to the society to create conditions, build the stage. During the 54, named in recognition of the tenth XX young 54 medal. The association of XX editing of young talent , the exchange of information and communication platform for the XX
27、 of outstanding young talents.(two) the establishment of municipal Party committee of young talent information database. In accordance with the feasible, effective, classification management, implement step by step principle, the establishment of municipal Party committee of youth talent database; g
28、uiding organizations at various levels generally established the young talent database, construction of city, county (directly under the Communist Youth League), grassroots organizations three young talent information database the relevant information collection system, and gradually establish the c
29、itys young people, the Communist Youth League youth talent information network, provide information platform for young talent resource development.Five, take effective measures to strengthen the mission management(a) to strengthen the mission management work. Strengthen the dues collection and manag
30、ement, continue to adhere to the dues collection regularly reporting system, the annual comprehensive award in recognition of the tour and the tour one vote veto system audit system. Do statistical work in the group. The group service award in recognition of the advanced units, standardization, prom
31、oting group management work institutionalized.(two) to strengthen the organization of research and information exchange efforts. Grassroots carry out research, efforts to form a number of theoretical results. Make full use of the network carrier, to explore the establishment of electronic group serv
32、ice system, promote the work of Communist Youth League information.Attachment 4:XX municipal Party Committee Propaganda Department of the Communist Youth League work pointsIn 2006, the Communist Youth League propaganda ideological work XX to Deng Xiaoping theory and the important thought of Three Re
33、presents as guidance, study and implement the partys sixteen and the spirit of the the fifth Plenary Session of the 16th CPC Central Committee implementation of the eight plenary session of the two committee, the citys cultural work conference, the Propaganda Department of the meeting and the the fo
34、urth Plenary Session of the 15th CPC Central Committee permanent mission spirit, closely around 11th Five-Year XX the goal of full implementation of Scientific Outlook on Development, emancipating the mind, seeking truth from facts, keep pace with the times, close to reality, close to life, close to
35、 the young, persevere grasp orientation, grasping deepening, grasping construction innovation, further improve the groups propaganda and ideological work ability, unity To guide the majority of members of the youth to achieve the 11th Five-Year planning tasks, the overall construction of a well-off
36、society, building a socialist harmonious society to make new contributions.One, adhere to the Three Represents important thought and Scientific Outlook on Development education to guide the youth, to further strengthen the ideological and political education of youth(a) armed with youth science theo
37、ry. Unremittingly with Deng Xiaoping theory and the important thought of Three Represents armed members of youth education, to promote the study and implement to expand the depth and breadth. To study and implement the important thought of Three Represents with the establishment and implementation o
38、f Scientific Outlook on Development combine with the implementation of the requirements of constructing socialist harmonious society with Scientific Outlook on Development, carry out education as an important part of the theory of armed youth in the new period, strengthen the establishment and imple
39、mentation of Scientific Outlook on Development education, educate and guide the youth to fully understand the great significance of establishment and implementation of Scientific Outlook on Development, in-depth understanding of the Scientific Outlook on Development era back The king, the practice f
40、oundation, basic connotation, historical status, spirit and practice requirements, a profound understanding of Scientific Outlook on Development with Marxism Leninism, Mao Zedong thought, inheriting and developing relationship between Deng Xiaoping theory and the important thought of Three Represent
41、s, to help young people establish and consciously practice Scientific Outlook on Development. Persist in learning, grasping the backbone, grasp the practice, grasp the opportunity. Catch club, effective way to grasp the network, with the group of cadres, young students and young backbone fronts as t
42、he focus, to promote the work of the armed youth theory to develop in depth, to help the youth continue to firm ideals and beliefs, to build a powerful spiritual pillar. To carry out the study and implementation of the partys sixteen session of the five Eight plenary session of the two plenary sessi
43、on of the Central Committee and the party spirit, to the citys Youth League members thinking into the spirit of the meeting, to achieve the goal of national consciousness and XX economic and social development in 11th Five-Year period. Contribute to help and guide the youth to a profound understandi
44、ng of the significance and main task of building a socialist harmonious society, actively join the construction of socialist harmonious society.(two) to strengthen the ideological and moral construction of teenagers. Thoroughly implement the central spirit of the document No. 8, No. 16 and the progr
45、am for Improving Civic Morality to minors and students as focus groups, to strengthen and improve the ideological and moral construction of minors and the ideological and political education of college students. Make full use of the spirit and the spirit of the Three Gorges migrants Hongyan XX uniqu
46、e the use of educational resources, school, into the team, the league, to join the party, adult occasions, extensive Hongyan spirit generation theme education activities. Use of holidays and leisure time, youth organizations three rural areas, four communities, four and moral practice, guide the you
47、th Youth to enhance national pride, self-esteem and self-confidence, to establish the trend of the times and adapt to the trend of thinking, value orientation and behavior.(three) innovative ways and means of ideological education. Grasp the new trend of the development of the times, the new hot new features and social ideological status of young people, to further explore the methods of ideological education using modern t
