公路桥涵施工技术规范新增内容如下.doc
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1、公路桥涵施工技术规范新增内容 一试验方面:集料有关指标按方孔筛标准列出,列出了粗细集料的表观密度,松散堆积密度,孔隙率和吸水率压碎值含泥量,针片状含量等各项指标按123.类划分。对水泥的碱含量提出了明确要求。当 采用碱活性集料时 ,宜选用含碱含量不大于6的低碱水泥。混凝土用水的品质指标检验项目和标准要求也做了详细的说明,按混凝土等级分为预应力砼钢筋砼和素砼。对掺合料和外加剂等混合材料作了更为严格的规定。同时也给出了具体的技术要求;对混凝土的配合比设计增加了耐久性(抗冻抗渗抗侵蚀)指标的要求;对混凝土的拌制,运输到浇筑振捣提出了要求。对抗渗抗冻和高强度C60以上的高强度砼明确提出了详细的说明和控
2、制的技术指标。对新增加的高性能混凝土施工从原材料到配合比设计都提出了具体的性能检测指标和技术要求。二质量检验:砼的质量检验从施工前,施工过程,和施工后三个阶段的检验提出了检验的项目和检验的内容。三砼强度的检验评定作了修改:1计算方法的修改;2合格判定系数的修改。四钢筋的机械连接取消了锥螺纹连接接头,对镦粗直螺纹,滚轧直螺纹和套筒挤压连接三种接头予以新规定。五焊接钢筋的质量验收内容和标准:钢筋闪光对焊接头,电弧焊接头,电渣压力焊接头,和气压焊接头其中对钢筋电弧焊接头尺寸偏差及缺陷允许值做了修改。对电弧焊,电渣压力焊,和气压焊及预埋件钢筋T形接头分别详细说明检验批量并在检验过程中对个别项目检验指标
3、做了修改。五在后张预应力管道材料中增加了对塑料波纹管的有关规定和检验方法及检测数量运输存放等相关要求。六施加预应力:对预应力张拉用的机具设备和仪表列出了新规定,标定时间1.使用超过六个月;2张拉次数超过300次。3.使用过程中千斤顶过压力表出现异常情况;4.千斤顶检修过更换配件后。预应力筋采用应力控制方法张拉时,应以伸长值进行校核,实际伸长值与理论伸长值的差值应符合设计规定 ,设计未规定时,其偏差应控制在正负6,老规范是正负5.对先张法预应力筋放张也做了规定,要求不低于设计强度的80,原规范. 规定75;对后张法预应力筋增加了整体穿束施工技术;张拉时构件的混凝土强度应符合设计要求,设计未规定时
4、,要求不低于设计强度的80,原规范. 规定75,并增加了要求弹性模量应不低于混凝土28天弹性模量的80。并对后张法预应力筋张拉程序做了修改,修改了控制应力和持荷时间。七后张孔道压浆及封锚:预应力筋张拉锚固后,孔道压浆应在48小时内完成;采用专用压浆料或专用压浆剂配制的溶液,并列出了各项性能指标;从设备的的性能和压浆工艺的技术要求及质量标准做了详细的说明;增加了真空辅助压浆工艺和抗折强度试验。八增加了第13章扩大基础承台与墩台;九增加了第20章海洋环境桥梁;十增加了第25章安全施工与环境保护。十一 增加了第26章工程交工十二 增加了环氧涂层钢筋无黏结预应力和体外预应力桩底后压浆膜袋围堰刚拱桥斜腿
5、刚构桥拓宽改建梁桥拼接施工大型箱梁整孔预制安装刚索桥埃塔斜拉桥无背索斜拉桥自锚式悬索桥波形刚涵洞涵洞接长等内容。十三 对挖孔灌注桩增加了挖孔施工安全的要求;并对岩溶采空区软土冻土等特殊地区的的灌注桩施工作了相应的规定。十四 明确规定了片石混凝土仅用于基础,墩台等圬工受压结构中。十五 沉井增加了泥浆润滑套下下沉沉井的有关技术要求。十六 地下连续墙增加了钻抓发銑削法钻劈法抓取法等成槽方法的施工技术要求。十七 斜拉桥增加了对拉索锚固区环形预应力束刚锚箱等的施工要求,以及对钢绞线拉索制作和安装的技术规定。十八 悬索桥增加了索鞍预制索股和索夹等制造方面的技术要求,以及主缆架设空中防线法的施工规定。十九
6、钢桥一章中对钢梁的厂内拼装作出了更详细的规定。原规范中的焊接工艺评定引用其他标准,现将焊接工艺评定的规定列入了本规范饭附录中,便于直接遵照执行。二十 对大跨径桥梁施工过程控制的要求作出了原则规定。二十一 海洋环境桥梁一章中提出了对海上桥梁的特殊施工要求,以及海洋腐蚀环境条件下保证结构耐久性的施工技术要求。二十二 安全施工与环境保护一章中,在安全施工方面,主要对桥涵工程施工场地的规划和临时设施的设置机具设备和参加施工的作业人员高空作业水上作业施工现场用电起重吊装施工防火季节性施工爆破施工,以及在特殊地区进行桥涵施工时的安全作出了比较明确的规定;环境保护方面,主要对防止水土的污染和流失空气污染和噪
7、声污染,以及对文物古迹和自然生态环境的保护等予以规定。二十三 桥面及附属工程:支座安装 对板式橡胶支座盆式橡胶支座球形支座的安装施工过程控制个别地方做了修改;对支座安装的质量标准作了调整,增加了斜拉桥悬索桥支座安装质量标准的规定。 伸缩装置 对浇筑后的砼养生时间作了规定要求覆盖洒水养生7天;伸缩装置的安装质量标准作了调整,增加了长度检测项目,纵坡和平整度指标也作了调整。泄水孔施工的要求应符合设计规定,泄水孔的顶面不应高于水泥混凝土铺装层的顶面。桥面铺装 沥青混凝土桥面铺装的施工:当采用刻槽方式增加沥青混凝土铺装层与混凝土桥面的啮合,提高其抗滑能力时,刻槽的宽度宜为20,槽间距宜为20。槽深宜为
8、3-5.沥青混凝土的配合比设计铺筑及碾压等施工,应符合现行标准 (JTGF40)的有关规定。老规范为 (JTJ032). 水泥混凝土桥面铺装提出拉毛或压槽的深度应符合 (JTGF30)的有关规定。老规范要求深度为1-2.混凝土桥面铺装施工质量标准也作了调整;厚度: 沥青混凝土+10,-5.水泥混凝土+20,-5.老规范统一规定为+10,-5;高速公路,一级公路以上的小桥可按路面的要求进行质量控制。钢桥面铺装:对钢桥面铺装施工前要制定专项技术方案,铺装施工前应做试验段,试验段的铺设应包括钢桥面的全部工序,并对施工过程控制环境稳定等提出了要求,列出了钢桥面施工质量标准; 桥面防护设施:混凝土防撞护
9、栏的施工作了详细的规定,对结构重心位于梁体以外的悬臂式防撞护栏,应在主梁横向联结或上结构完成后方可施工;对就地浇筑的防撞护栏,宜在顺桥向每间隔58设1道断缝或假缝;模板宜采用钢模,支模时宜在其顶部和底部各设1道对拉螺杆,或采用其他固定模板的装置;防撞护栏的钢筋应与梁体的预留钢筋可靠连接;宜采用塌落度较小的干硬性混凝土,浇筑应分层进行,分层厚度不宜超过200;振捣时应采取适当的措施使模板表面的气泡逸出。对预制安装的防撞护栏:在搬运和安装时,应采取适当的保护措施,防止损伤棱角处的混凝土。连接钢板的焊接质量应符合设计要求和规范的相关规定。施工完成后的防撞护栏:其顶面高程和位置应准确,位于弯道上的护栏
10、其线形应平顺。并对防撞护栏施工质量标准要求作了规定。护栏,栏杆安装质量标准进行修改,其中相邻护栏扶手高差及护栏接缝两侧高差修改为3,增加了扶手高度的质量标准要求:正负10。桥面安全带和缘石的安装施工也作了规定;桥头搭板 :钢筋混凝土桥头搭板施工提出:搭板钢筋与其下的垫层宜设置垫块并应交错布置,在上下两层之间应设置支撑保证其位置的准确。浇筑搭板时应按照搭板的坡度由低处向高处进行,振捣时应避免碰撞钢筋模板;并对搭板施工质量标准作出规定;包括砼强度,枕梁尺寸,板尺寸,顶面高程和顶面纵坡。(英文版 ) Two regulations promulgated for implementation is
11、in the party in power for a long time and the rule of law conditions, the implementation of comprehensive strictly strategic plan, implementation in accordance with the rules and discipline to manage the party, strengthen inner-party supervision of major initiatives. The two regulations supporting e
12、ach other, the adhere to a positive advocate, focusing on morality is of Party members and Party leading cadres can see, enough to get a high standard; around the party discipline, disciplinary ruler requirements, listed as negative list, focusing on vertical gauge, draw the party organizations and
13、Party members do not touch the bottom line . Here, the main from four square face two party rules of interpretation: the first part introduces two party Revised regulations the necessity and the revision process; the second part is the interpretation of the two fundamental principles of the revision
14、 of laws and regulations in the party; the third part introduces two party regulations modified the main changes and needs to grasp several key problems; the fourth part on how to grasp the implementation of the two regulations of the party. and revised the necessity and revised history of the CPC C
15、entral Committee the amendment to the Chinese Communist Party members and leading cadres honest politics several guidelines and column 1 by 2015 to strengthen party laws and regulations focus. Two party regulations revision work lasted a Years, pooling the wisdom of the whole party, ideological cons
16、ensus, draw historical experience, respect for the wisdom of our predecessors, which reflects the unity of inheritance and innovation; follow the correct direction, grasp the limited goals, adhere to the partys leadership, to solve the masses of the people reflect a focus on the problem. The new rev
17、ision of the and , reflects the partys 18 and the eighth session of the third, the spirit of the fourth plenary session, reflecting the experience of studying and implementing the General Secretary Xi Jinping series of important speech, reflects the partys eighteen years comprehensive strictly pract
18、ice. (a) revised two regulations of the party need of in based on revised, the promulgation and implementation of January 2010, to strengthen the construction of the contingent of leading cadres play an important role. But with the party to manage the party strictly administering the deepening, has
19、not been able to fully meet the actual needs. Content is too complicated, eight prohibition, 52 are not allowed to hard to remember, and also difficult to put into practice; the second is concisely positive advocated by the lack of prohibited provisions excessive, no autonomy requirements; the third
20、 is banned terms and discipline law, both with the party discipline, disciplinary regulations repeat and Criminal law and other laws and regulations repeat; the fourth is to clean the theme is not prominent, not for the existing problems, and is narrow, only needle of county-level leading cadres abo
21、ve. is in 1997 based on revision, in December 2003 the promulgation and implementation, to strengthen the construction of the party play very important role. Along with the development of the situation, which many provisions have been unable to fully meet the comprehensive strictly administering the
22、 practice needs. One is Ji law, more than half of the provisions and criminal law and other countries laws and regulations Repetition; two is the political discipline regulations is not prominent, not specific, for violation of the party constitution, damage the authority of Party Constitution of mi
23、sconduct lack necessary and serious responsibility to pursue; third is the main discipline for the leading cadres, does not cover all Party members. Based on the above situation, need to and the two is likely to be more relevant regulations first amendment. By revising, really put the authority of P
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