混凝土结构实体强度同条件养护试块参考.doc

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1、浙江鸿鑫建设公司兴义分公司 混凝土同条件养护专项方案目 录一、编制依据2二、工程概况及工程特点2三、同条件养护试块留置办法6四、同条件养护试块制作养护办法9五、同条件养护试块强度统计及计算办法10六、同条件养护试块管理小组12七、不合格情况处理办法13一、编制依据1、混凝土结构工程施工质量验收规范GB50204-2002;2、混凝土强度检验评定标准GBJ-107;3、兴义商城6#、7#楼工程施工图纸二、工程概况及工程特点参建单位1、 建设单位:贵州炜煜房地产建设开发有限公司;2、 设计单位:深圳市建筑设计研究院有限公司;3、 勘察单位:贵州省建筑工程勘察院;4、 监理单位:贵州深龙港工程项目管

2、理有限公司;5、 质量监督部门:兴义市建筑业管理处;6、 施工单位:浙江鸿鑫建设有限公司。工程概况本工程主体为现浇混凝土部分框支-剪力墙结构,基础均为人工挖柱下独立基础承台及基础连系梁,总建筑面积为149449.3,其中地下室建筑面积为26236.3,地上建筑面积为123213。地下室二层,每层层高4.8米,地上商铺一层层高4.95米、商铺转换层层高4.80米、商铺其它层层高4.50米,商铺层以上其余层高均为2.9米。其中:1#楼由三层商业裙房及上部26层得公寓组成,地下 层,总建筑面积 平方米,建筑高度0.000以上最高处为 m,0.000相当于黄海高程 ;2#楼由三层商业裙房及上部19层得

3、经济型酒店组成,地下 层,总建筑面积 m2,建筑高度0.000以上最高处为 m,0.000相当于黄海高程 ;3#楼由四层商业裙房及上部12层的办公塔楼组成,地下3层,总建筑面积为 m2,建筑高度0.000以上最高处为 m,0.000相当于黄海高程 ;4-5#楼由三层商业裙房及上部24层住宅塔楼,地下3层,总建筑面积为 m2,建筑高度0.000以上最高处为 m,0.000相当于黄海高程 ;6-7#楼由三层商业裙房及上部29层住宅塔楼,地下3层,总建筑面积为91540.6m2,建筑高度0.000以上结构高度分别为96.65、96.75m,0.000相当于黄海高程1154.95;8#楼由三层商业裙房

4、及上部25层住宅塔楼,地下3层,总建筑面积为 m2,各部分结构构件部位混凝土强度等级: 1#楼2#楼砼强度等级砼强度等级 3#楼4#、5#楼砼强度等级砼强度等级6#、7#楼8#楼垫层地下室基础、承台、底板C30水池C30负二层墙柱C35地下室顶板C30负二层以上墙柱C30塔楼梁板,地下一层至屋顶(三层转换层除外)C30塔楼三层转换层C45塔楼地下二层至十二层墙柱C45塔楼十三层至十八层墙柱墙柱C40塔楼十九层至二十四层墙柱墙柱C35塔楼二十五层至屋顶墙柱C30三、同条件养护试块留置办法1、同条件养护试件所对应的结构构件或结构部位,应由监理(建设)、施工等各方共同选定。2、同条件养护试件必须由持

5、有效证件的取样员在相应结构构件或结构部位的砼中取样,并有监理方见证。3、对混凝土结构工程中的各混凝土强度等级,均应留设同条件养护试件。4、同一强度等级的同条件养护试件,其留设的数量应根据混凝土工程量和重要性确定,不宜小于10组,且不应小于3组。5、同条件养护试件拆模后,应放置在靠近相应结构构件或结构部位的适当位置,并应采取同样的养护方法,同条件试件养护过程,应做明显标识,注意试件的保护,避免遭到破坏或丢失。楼号C45C40C35C301#楼2#楼3#楼4#、5#楼6#、7#楼塔楼地下二层至地上十二层墙柱塔楼三层转换层梁板塔楼十三层至十八层墙柱负二层墙柱水池塔楼十九至二十四层墙柱地下室基础、承台

6、、底板负二层顶板及以上墙柱塔楼二十五层至屋顶塔楼墙柱地下一层至屋顶(三层转换层除外)8#楼地下室同条件混凝土留置部位:栋号留 置 部 位C50C40C35C301#楼地下室负二层、负一层柱8组/桩承台及地梁6组/地下室负一层梁、板/6组合 计8组6组6组2#楼地下室负二层、负一层外墙、柱/地下室负一层梁、板/3组合 计/3组3#楼地下室负一层、一层梁、板、柱/8组合计/8组4#、5#楼地下室负二层、负一层柱4组地下室负一层梁、板3组合计4组3组6#、7#楼合计8#楼合计塔楼同条件混凝土预留部位:栋号留 置 部 位C50C40C35C301#2#楼地下室负二层、负一层柱8组/桩承台及地梁6组/地

7、下室负一层梁、板/6组合 计8组6组6组3#楼地下室负二层、负一层外墙、柱/地下室负一层梁、板/3组合 计/3组5#楼地下室负一层、一层梁、板、柱/8组合计/8组6#楼地下室负二层、负一层柱4组地下室负一层梁、板3组合计4组3组四、同条件养护试块制作养护办法1 、同条件养护试块留置位置应由甲方及监理会同项目部技术负责人共同确定(见上表)。2、试块模应具有合格证的合格产品,试块模规格为150150150,一组三块。3、试块制作应由具有试验员资质的专人制作。4、同条件养护试块制作取样点应在留置部位入模处,并且由监理见证取样,跟踪检查。5、本试块制作采用人工插捣方法。6、试块制作应严格按试块制作规范

8、要求进行。7、拌和物应分二层装入试模,每层的装料厚度大致相同,插捣用的钢制捣棒长为600mm,直径为16mm,端部应磨圆,每层的插捣次数为每1002不应少于12次,插捣完后,刮除多余的混凝土,并用抹刀抹平。8、试块制作的混凝土不得加料,违规制作。9、12小时后在监理见证下进行同条件养护试块拆模工作,并将其放置在特制的500500500钢筋笼内,并加锁搁置在取样部位进行同条件养护。10、本工程混凝土养护采用人工洒水养护(部分部位可采用蓄水养护),养护次数的根据是能保持混凝土处于湿润的状态来决定,洒水养护开始是于混凝土浇筑完毕后的12小时进行。12、试块养护时养护要求应与周边混凝土结构养护要求相同

9、,不得特别照顾,并且养护时间不得少于14天不得多于60天。13、由项目部同条件养护试块制作人进行养护温度的统计和记录,当温度累计到600D时所对应的龄期,0及以下不计入龄期或等效龄期不应小于14d,也不大于60d,由监理见证送质检站检验。五、同条件养护试块强度统计及计算办法1、 当同条件养护试块到达龄期时,应填报送检申请表,送质检站检测,检测报告不合格时,应联系相关单位进行砼结构回弹抽芯。并且此组试块强度不得参加混凝土试块强度评定,只有检测报告合格的混凝土试块方可参加混凝土试块强度评定。2、 同条件养护试件的强度代表值应根据强度试验结果按现行国家标准混凝土强度检验评定标准GBJ107的规定确定

10、后,乘折算系数,折算系数宜取为1.10。3、 评定时应以相同混凝土强度等级进行评定,不同混凝土强度等级应分开评定。4、 混凝土评定分两种情况,当混凝土试块组数不少于10组时,应采用统计方法进行计算。当混凝土试块组数不少于3组且不多于10组时,应采用非统计方法进行计算。计算公式:a、统计方法:mfcu1Sfcu0.9fcu,kfcu,min1 fcu,kb、非统计方法:mfcu1.15fcu,kfcu,min0.95 fcu,k式中:mfcu同一验收批混凝土强度的平均值(N/mm2)fcu,k设计的混凝土强度标准值(N/mm2)fcu,min同验收批混凝土强度最小值(N/mm2)Sfcu同一验收

11、批混凝土强度的标准值(N/mm2)如Sfcu的计算值小于0.06 fcu,k时,则取Sfcu=0.06 fcu,k混凝土强度合格判定系数表 试件组数合格判定系数101415242511.701.651.6020.900.850.85混凝土强度的标准差Sfcu=式中 fcu,I第I组混凝土试件强度值(N/mm2)n一个验收混凝土试件组数当检验结果能满足上两式要求的,则该批混凝土强度判为合格,当不满足上述规定的,则该批混凝土强度判为不合格。由不合格批混凝土制成的结构或构件应进行鉴定,对不合格的结构或构件必须会同甲方、设计、监理及质检站进行及时处理,提出处理意见。六、同条件养护试块管理小组 项目经理

12、:刘红伟 项目临理部 过程监督项目工程师:张俊试验员:黄海繁现场养护 送检 资料统计计算,归档。七、不合格情况处理办法1、 每次检测报告从质检站取回之后应做好记录并上报项目临理部。2、 当不合格时,也应立即上报项目临理部,不得隐瞒不报。并就不合格报告强度数值与标准养护强度数值进行对比分析,由质检站质量监督员进行现场回弹或抽芯,回弹抽芯不合格,则作为重大质量事故处理。3、 对于重大质量事故,应由设计、质检站、甲方、监理及施工单位进行讨论提出针对性处理方案。八、混凝土试件同条件养护温度记录统计表混凝土试件同条件养护需填写混凝土试件同条件养护温度记录统计表(见后附表)附表混凝土试件同条件养护温度记录

13、统计表工程名称:广西一建老虎岭生活区1#、2#住宅楼工程结构部位:记录温度来源: 天气预报 实测日 期当天温度()累计值日 期当天温度()累计值最低最高平均值最低最高平均值月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日月 日记录统计: 审核:混凝土结构实体强度同条件养护试块 “混凝士结构实体强度同条件养护试块”(以下简称“同条件养护试块”)是新的混凝土结构工程施工质量验收规范(GB50

14、204-2002)中提出的一项新规定,已执行两年多了,但在我们近期的监督工作中,发现一些建设、监理、施工单位对“同条件养护试块”的概念不是十分明白,施工中存在漏做或未按规范要求进行留置的现象,给混凝土结构工程的质量评价和工程验收带来了困难。为使各参建单位对“同条件养护试块”有一个清楚的认识和理解,以便今后能认真执行,下面就“同条件养护试块”的几个问题介绍如下: 一、什么是“同条件养护试块”?“同条件养护试块”的试压强度值是反映砼结构实体强度的重要指标,它是指砼试块脱模后放置在砼结构或构件一起,进行同温度、同湿度环境的相同养护,达到等效养护龄期时进行强度试验的试件。其试验强度是作为结构验收的重要

15、依据。 二、“同条件养护试块”的留置数量如何确定?1、规范规定:(1)同条件养护试块”所对应的结构构件或结构部位,应由监理(建设)、施工等各方共同选定;(2)对砼结构工程中的各砼强度等级均应留置“同条件养护试决”(3)同一强度等级的“同条件养护试块”,其留置的数量应根据砼工程量和重要性确定,不宜少于10组,且不应少于3组。 2、地方规定:我市为了有效地执行混凝土结构工程施工质量验收规范(GB50204-2002)关于“同条件养护试决”的规定,特作出了具体的要求:(1)砌体承重结构工程每一强度等级每一楼层应留置不少1组、混凝土结构工程每一强度等级每批次应留置不少于1组,且同一工程同一强度等级不宜

16、少于10组,不应少于3组;(2)同一工程同一强度等级的混凝土只浇筑一个批次时,同条件混凝土养护试件不得少于1组,当该批次连续浇筑大于500m3时,不得少于2组。 三、“同条件养护试块”在养护期应放置在何处?“同条件养护试块”脱模后,应放置在靠近相应结构构件或结构部位附近的适当位置,并采用相同的养护方法。为便于保管,施工单位通常将试块装在特制的钢筋笼内并放置在相应的位置。 四、“同条件养护试块”的等效养护龄期如何确定?1、等效养护龄期可取日平均温度逐日累计达到600d时所对应的龄期,0及以下的龄期不计入;等效养护龄期不应小于14d,也不宜大于60d;2、施工单位应指定专人负责,建立“温度天”累计

17、台账(我站设计有专门的表格,可供使用)。累计到600d左右时,应及时送试验机构检测。 五、结构“同条件养护试块”抗压强度值如何评定?“同条件养护试块”强度代表值乘折算系数1.1后,按GBJ107的规定进行评定,评定合格,该分部工程混凝土实体强度才能判定为合格。第65页 共65页(英文版 ) Two regulations promulgated for implementation is in the party in power for a long time and the rule of law conditions, the implementation of comprehensiv

18、e 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 each other, the adhere to a positive advocate, focusing on morality is of Party members and Party leading

19、 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 Party members do not touch the bottom line . Here, the main from four square face two party rules of int

20、erpretation: 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 of laws and regulations in the party; the third part introduces two party regulations modified the main

21、 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 Central Committee the amendment to the Chinese Communist Party members and leading cadres honest politics

22、 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 consensus, draw historical experience, respect for the wisdom of our predecessors, which reflects the unity

23、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 revision of the and , reflects the partys 18 and the eighth session of the third, the spirit of the fourth

24、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 practice. (a) revised two regulations of the party need of in based on revised, the promulgation and implemen

25、tation 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 not been able to fully meet the actual needs. Content is too complicated, eight prohibition, 52 are not

26、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 is banned terms and discipline law, both with the party discipline, disciplinary regulations repeat and

27、 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 above. is in 1997 based on revision, in December 2003 the promulgation and implementation, to strengthen th

28、e 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 practice needs. One is Ji law, more than half of the provisions and criminal law and other countries la

29、ws 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 misconduct lack necessary and serious responsibility to pursue; third is the main discipline for the leadi

30、ng 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 Party discipline, the seriousness in the party tree and call up the majority of Party members and cadres

31、of the party constitution of party compasses party consciousness. (II) two party regulations revision process the Central Committee of the Communist Party of China attaches great importance to two regulations revision . Xi Jinping, general books recorded in the Fifth Plenary Session of the eighth se

32、ssion of the Central Commission for Discipline Inspection, on the revised regulations made clear instructions. According to the central deployment, the Central Commission for Discipline Inspection from 2014 under six months begin study two regulations revision. The Standing Committee of the Central

33、Commission for Discipline Inspection 4 review revised. Comrade Wang Qishan 14 times held a special meeting to study two regulations revision, amendment clarifies the direction, major issues of principle, path and target, respectively held a forum will listen to part of the province (area) secretary

34、of the Party committee, Secretary of the Discipline Inspection Commission, part of the central ministries and state organs Department The first party committee is mainly responsible for people, views of experts and scholars and grassroots party organizations and Party members. Approved by the Centra

35、l 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 (autonomous regions, municipalities) Party, the central ministries and commissions, state ministries and commissions of the Party (party

36、), the General Political Department of the military, every 3 people organization of Party of two regulations revision opinion. Central Commission for Discipline Inspection of extensive solicitation of opinions, careful study, attracting, formed a revised sent reviewers. In October 8 and October 12,

37、Central Committee Political Bureau Standing Committee and the Political Bureau of the Central Committee After consideration of the two regulations revised draft. On October 18, the Central Committee of the Communist Party of China formally issued two regulations. Can say, two laws amendment concentr

38、ated 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 eighteen, ten eight plenary, the spirit of the Fourth Plenary Session of the Eleventh Central Committee and General Secretary Xi Jinpin

39、g important instructions on the revised and , highlighting the ruling party characteristics, serious discipline, the discipline quite in front of the law, based on the current, a long-term, advance as a whole, with Bu Xiuding independent and . Main principle is: first, adhere to the party constituti

40、on to follow. The constitution about discipline and self-discipline required specific, awaken the party constitution of party compasses party consciousness, maintaining 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 Session of the 16th Central Committee, Xi

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