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1、“方山雅苑”住宅小区一区工程地下室后浇带施工方案本工程地下车库建筑面积41940,由四条后浇带将底板和顶板分别分成七个板块,东西向三条,长度分别为167.40m、160.80m和86.40m,南北向一条,长度为214.15m,底板和顶板上的水平后浇带总长均为628.75m。相应地,地下室外墙上设有七条后浇带,每条长度即为外墙高度3.80m,总长26.60m。因此,后浇带的数量较多,工程量较大。本工程后浇带均为防止混凝土收缩变形引起裂缝而设置的后浇带,宽度均为800mm,厚度同其两侧相邻结构,即底板500mm厚(梁处1000mm),顶板500mm厚,外墙300mm厚。一、后浇带的留置后浇带应按设
2、计位置留置,先后浇筑的混凝土界面应垂直于现浇结构平面,在先浇筑的混凝土截面中部设置“U”型止水钢板,止水钢板的“开口”朝迎水面,止水钢板采用短钢筋头与结构钢筋焊接固定。止水钢板上下(或内外)到现浇结构上下(或内外)表面采用2.5目专用焊接钢丝网封堵,钢丝网采用角钢或钢筋与结构钢筋焊接而形成的骨架来辅助固定,两片钢丝网连接处的搭接长度不小于100mm,钢丝网与骨架的扎结点间距不大于50mm。固定止水钢板和钢丝网的钢筋或骨架铁件均不得伸出结构钢筋外表而进入结构钢筋保护层,以防形成渗水通道。钢丝网及其与固定骨架之间的连接必须具备足够的强度和抗冲切能力,固定骨架必须具备足够的整体刚度,确保先浇混凝土不
3、冲破钢丝网,减少后浇带的变形和位移。先浇混凝土浇筑前,在进行隐蔽验收时,应把后浇带的留设作为重点进行检查,检查合格方可浇筑混凝土。底板和顶板混凝土浇筑过程中,当混凝土浇筑至后浇带附近时,应局部调整混凝土的浇筑方向,即先浇筑后浇带侧边,仔细而用力适当地振捣,使其形成相对较稳固的端面后,再往远离后浇带的方向浇筑,避免顺向浇筑对钢丝网形成强大的挤压和猛力的冲击。外墙混凝土浇筑过程中,根据混凝土泵送时自然形成的流淌坡度,分层浇筑厚度控制在500mm以内,每4h覆盖一次,当振捣到后浇带两侧时,要细致振捣,且不得过振。后浇带处的配筋可以根据设计要求予以加强。特别地,底板后浇带部位,在垫层施工时,沿后浇带纵
4、向留设2的坡度,在后浇带的端头设积水坑,以便及时排出积水;在底板垫层浇筑后、钢筋绑扎前做好防水层及局部附加防水层。二、后浇带的保护后浇带设置完成到浇捣有相当长的一段时间,为了防止异物进入,或后浇带钢筋在外力作用下变形,或底板后浇带处防水层受损,对将来混凝土浇筑后的结构质量和抗渗性能造成不利影响,况且由于后浇带处钢筋密集,一旦发生污染、变形或损坏,清理和修整十分困难,同时也为安全考虑,需对后浇带加以保护。底板和顶板后浇带可以采用固定钢质盖板覆盖保护,但需事先在后浇带两侧先浇混凝土浇筑时预设固定槽,也可采用其它措施予以覆盖保护。外墙后浇带的保护方案是,外侧采用一砖砌筑挡土墙进行围护,如下图所示,内
5、侧采用木模板封闭。由于后浇带中的钢筋长期暴露在空气中或浸没在水中,极易锈蚀,可在后浇带设置后尽快给后浇带中的钢筋刷纯水泥浆,以防锈蚀。特别地,顶板后浇带在后浇混凝土达到设计强度的80%时,方可拆除后浇带位置及其两侧的模板和支撑。顶板后浇带留置期间直至后浇混凝土达到上述强度之前,其两侧板块或梁底的模板和支撑不得变动,更不得拆除,且后浇带所在跨内除结构自重外,不得另行施加施工荷载或堆载,以防结构受损。三、后浇带的浇筑根据设计要求,本工程后浇带在地下室顶板混凝土浇筑30天后可以全部封闭。由于结构由后浇带连成整体,因此后浇带的施工质量与结构质量休戚相关,必须予以高度重视。在后浇带留置期间,尽管如上所述
6、,采取了比较周密的保护措施,但往往还是难以避免地受到污染或其它损害,故在封闭前必须对后浇带进行全面的彻底的清理和修整。然而,由于后浇带处断面较大,钢筋密集,钢丝网支设繁杂,清理和修整工作往往比较困难,但是必须克服畏难情绪和偷懒心态,一定要把这项工作做细做实,否则将会影响结构质量和抗渗性能。首先必须清理出杂物,底板后浇带还必须排空积水,然后祛除钢筋表面的水泥薄膜和后浇带两侧的松动石子,必要时,可采用钢丝刷对接缝面认真清理,用錾子凿去表面砂浆层,使其完全露出新鲜混凝土。如果有钢筋或止水钢板变形现象,必须修整到位,如果有先浇混凝土跑模或满溢、流淌至后浇带的现象,必须凿除干净。清理、修整工作完毕后,用
7、水冲洗干净,并排除积水,接着,进行隐蔽验收。顶板后浇带在清理、修整过程中,由于其下方临空,必须作必要的安全防护,一是防止上方作业人员踩空,二是防止落物伤及下方行人或其它作业人员。后浇带隐蔽验收合格后,顶板后浇带要支设底模,外墙后浇带要支设内外侧模,后浇带模板必须具备足够的强度、刚度和稳定性,与先浇混凝土之接触面必须接合严密、平整服贴,必要时可夹以双面胶带或海绵条。各项工作完毕后方可浇筑后浇带混凝土,浇筑前,用水充分湿润新老混凝土接合面,然后铺抹水泥浆或与混凝土成分相同的水泥砂浆一层,或涂抹混凝土界面剂一层。由于后浇带中混凝土的浇筑与两侧混凝土浇筑存在时间上的差异,虽然先浇混凝土的大部分收缩已经
8、完成,后浇带两侧的混凝土界面基本趋于稳定,但是后浇混凝土如果采用普通混凝土浇筑,必将产生一定量的收缩,而且发生在相对有限的空间内,所以必然会在新老混凝土界面产生裂缝。为了避免此类裂缝的发生,或控制其发展,减轻此类裂缝对结构的危害,后浇混凝土必须采用比先浇混凝土高一强度等级的补偿收缩混凝土浇筑,其坍落度控制在120140mm之间。补偿收缩混凝土的配制方法:一是采用无收缩水泥配制,二是在普通混凝土中加入适量的微膨胀剂,由混凝土供应商选择采用。底板和顶板后浇带仍采用自然流淌方式形成分层,外墙后浇带应予以人为分层(按500mm/层),以实现分层布料、分层振捣。振捣应细致,不得漏振、欠振和过振,振捣上一
9、层时,振捣棒伸入下一层混凝土50100mm,确保连续振捣。为了提高混凝土的密实度,减少混凝土的最终沉实量,对浇筑后的混凝土,有必要在振动界限以前给予二次振捣。现场掌握振动界限的方法是:将运转着的振捣器以其自身的重力逐渐插入混凝土中进行振捣,如果在缓慢拔出振捣器后混凝土仍能自行闭合,而不会在混凝土中留下孔穴,这样就可认为,混凝土仍处于流塑状态,在振动界限以内,适宜进行二次振捣。底板和顶板后浇带混凝土的找平以两侧先浇混凝土面为准,可略高23mm,作为收缩和沉实余量。表面泌水和浮浆要及时清除,不得漫溢到后浇带以外的两侧板面,以免影响观感以及后续构造层与结构层的粘结。混凝土面的收面型式是收光还是留毛面
10、,同两侧相邻板面。底板和顶板后浇带混凝土浇筑后12h内且表面刚刚泛白时,即可覆盖并浇水养护;外墙后浇带混凝土浇筑后,一周内模板不宜拆除,用以保温保湿养护,且在其外表淋水以保持模板湿润,防止混凝土内水分过快地蒸发。后浇带混凝土养护时间不少于14d。后浇带混凝土浇筑时,必须按规范要求分别留置标准养护和同条件养护试块。四、施工组织由于本工程后浇带分布在多个项目组的多个施工区域,所以,各项目组、各施工区域必须服从项目部的统一部署,后浇带的清理、修整、支模和浇筑等各项工作必须统一步调、统一进度。清理和修整工作应按从上往下的顺序进行,先顶板、后外墙、再底板,防止同一区域内产生上下交叉污染,相邻区域交界处产
11、生左右或前后交叉污染。混凝土浇筑工作应按从下往上的顺序进行。清理和修整结束并经隐蔽验收后,即可浇筑底板后浇带混凝土,然后,支设外墙和顶板后浇带模板,浇筑外墙后浇带混凝土,待其充分沉实后浇筑顶板后浇带混凝土。需要特别强调的是,底板和顶板后浇带的混凝土浇筑必须分别在各项目组之间同时进行,退而言之,必须连续进行,即:各区域底板后浇带必须同时或连续浇筑,各区域顶板后浇带也要同时或连续浇筑,以防在相邻区域交界处产生新的施工缝,而这种施工缝除了卷材防水外,结构内无任何止水措施,如果处理不好,必将成为人为的渗水通道,后患无穷。江苏弘盛建设工程集团有限公司52(英文版 ) Two regulations pr
12、omulgated for implementation is 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.
13、The two regulations supporting each 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, d
14、raw the party organizations and 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 fundam
15、ental principles of the revision 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
16、and revised history of the CPC Central 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 t
17、he whole party, ideological consensus, 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 f
18、ocus on the problem. The new revision 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 ye
19、ars comprehensive strictly practice. (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 a
20、dministering the deepening, has 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
21、autonomy requirements; the third 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
22、 county-level leading cadres above. 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 comprehe
23、nsive strictly administering the 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 autho
24、rity of Party Constitution of misconduct 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 revisin
25、g, really put the authority of Party discipline, the seriousness in the party tree and call up the majority of Party members and cadres of the party constitution of party compasses party consciousness. (II) two party regulations revision process the Central Committee of the Communist Party of China
26、attaches great importance to two regulations revision . Xi Jinping, general books recorded in the Fifth Plenary Session of the eighth session of the Central Commission for Discipline Inspection, on the revised regulations made clear instructions. According to the central deployment, the Central Comm
27、ission for Discipline Inspection from 2014 under six months begin study two regulations revision. The Standing Committee of the Central Commission for Discipline Inspection 4 review revised. Comrade Wang Qishan 14 times held a special meeting to study two regulations revision, amendment clarifies th
28、e direction, major issues of principle, path and target, respectively held a forum will listen to part of the province (area) secretary of the Party committee, Secretary of the Discipline Inspection Commission, part of the central ministries and state organs Department The first party committee is m
29、ainly responsible for people, views of experts and scholars and grassroots party organizations and Party members. Approved by the Central Committee of the Communist Party of China, on 7 September 2015, the general office of the Central Committee of the Party issued a notice to solicit the provinces
30、(autonomous regions, municipalities) Party, the central ministries and commissions, state ministries and commissions of the Party (party), the General Political Department of the military, every 3 people organization of Party of two regulations revision opinion. Central Commission for Discipline Ins
31、pection of extensive solicitation of opinions, careful study, attracting, formed a revised sent reviewers. In October 8 and October 12, Central Committee Political Bureau Standing Committee and the Political Bureau of the Central Committee After consideration of the two regulations revised draft. On
32、 October 18, the Central Committee of the Communist Party of China formally issued two regulations. Can say, two laws amendment concentrated the wisdom of the whole party, embodies the party. Second, and revision of the basic principles of two party regulations revision work and implement the partys
33、 eighteen, ten eight plenary, the spirit of the Fourth Plenary Session of the Eleventh Central Committee and General Secretary Xi Jinping important instructions on the revised and , highlighting the ruling party characteristics, serious discipline, the discipline quite in front of the law, based on
34、the current, a long-term, advance as a whole, with Bu Xiuding independent and . Main principle is: first, adhere to the party constitution to follow. The constitution about discipline and self-discipline required specific, awaken the party constitution of party compasses party consciousness, maintai
35、ning the authority of the constitution. General Secretary Xi Jinping pointed out that no rules, no side round. Party constitution is the fundamental law, the party must follow the general rules. In early 2015 held the eighth session of the Central Commission for Discipline Inspection Fifth Plenary S
36、ession of the 16th Central Committee, Xi Jinping again pointed out that constitution is the party must follow the general rules, but also the general rules. the revision of the and is Method in adhere to the regulations established for the purpose of combining rule of virtue is to adhere to the part
37、y constitution as a fundamental to follow, the constitution authority set up, wake up the party constitution and party rules the sense of discipline, the party constitution about discipline and self-discipline specific requirements. 4 second is to adhere to in accordance with the regulations governi
38、ng the party and the party. The Party of rule of virtue de, mainly refers to the partys ideals and beliefs, excellent traditional style. The revised the closely linked to the self-discipline, insisting on the positive initiative, for all members, highlight the vital few, emphasized self-discipline,
39、focusing on the morality, and the majority of Party members and the ideological and moral standards. The revised Ji method separately, Ji, Ji Yan to Method, as a negative list, emphasizing the heteronomy, focusing on vertical gauge. Is this one high and one low, a positive reaction, the strict party
40、 discipline and practice results transformation for the integration of the whole party to observe moral and discipline requirements, for the majority of Party members and cadres provides benchmarking and ruler. Third, insist on to. In view of the problems existing in the party at the present stage,
41、the main problems of Party members and cadres in the aspect of self-discipline and abide by the discipline to make clearly defined, especially the partys eighteen years strict political discipline and political rules, organization and discipline and to implement the central eight provisions of the s
42、pirit against the four winds and other requirements into Disciplinary provisions. Not one pace reachs the designated position, focusing on in line with reality, pragmatic and effective. After the revision of major changes, major changes in the and modified and needs to grasp several key problems (a)
43、 adhere to according to regulations governing the party and party with morals in combination, for at the present stage, the leadership of the party members and cadres and Party members in existing main problems of self-discipline, put forward principles, requirements and specifications, showing Comm
44、unists noble moral pursuit, reflected at all times and in all over the world ethics from high from low 5 common requirements. One is closely linked to the self-discipline, removal and no direct relation to the provisions of . the second is adhere to a positive advocate, eight prohibition 52 are not
45、allowed to about the content of the negative list moved into synchronization amendment . Three is for all the party members, will apply object from the leadership of the party members and cadres to expand to all Party members, fully embodies the comprehensive strictly required. The fourth is promine
46、nt key minority, seize the leadership of the party members and cadres is the key, and put forward higher requirements than the ordinary Party members. Five is to simplify, and strive to achieve concise, easy to understand, easy to remember. The revised is the ruling Party since the first insists on
47、a positive advocate forAll Party members and the self-discipline norms, moral declaration issued to all members of the party and the National Peoples solemn commitment. criterion of a clean and honest administration consists of 4 parts, 18, more than 3600 words. After the revision of the , a total of eight, 281 words, including lead, specification and Party member cadre clean fingered self-discipline norms, etc. Part 3 members low-cost clean and self-discipline, the main contents can be summarized as four must e
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