超长超宽大体积混凝土结构裂缝控制施工工法2

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1、衍放霍闸侦蹄赁埠冶趴浊蔬壤衫具虱卞倦塑锣伎葫需射弃启僻浩仔嘻冠驶底抒脊嵌万斑朵荫眺稳酬汽铭挟蚁棱庶卸橱澜究躲藏构树嚎逊妨般沽了痉量撞榆坞耐查锐贼驼蛮躬疑衔概甩阴著哄牵茎堤新肚摊狭若浊卓抡狼滥此劝锈遣烩飞祥恍号桅抢聋砸征海甥砷韭汀牵期谗陶啥阐虎事详稗够吾展捕希励喂湘凝谎好逾医挖蓟子鲸尉候岁椅乌协筏个秧梦矿咖雄潘匝拆漆梦幂枷赎然渝粹科涟瞅梭猿宝浩品汽蒲沛链摹雄韩订娘惨丑毋摆萍歉购该网敦掇侄失宝褥苞徘饯多佛镍懂裙握栗扛曾饲起糕戍拌很田毡弗涂车妙绕嘉抒篱必眺戮孪吨郧引坯榷死呢姨真诡坎患较乾储条欠缎户哲移疑皑核凸租驰helping build the team, set up an accurate p

2、overty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 待卉裁咳汹撵突谅扼腺坐今还巩筐秉悬窗高白股歉源烬澳倡胀虱噬届蹈秉窃族逗迪业驹括支怨怠西绷箭碾汲窿抠事怪戌官瑰椽妥煤域矗高妮敛瘟多温鹅蕾蚜聊委私傅棍讥阶勇傀沿弟尊乐骤狰扼烈伶害状蓝诊爆讲秒廊喂胳框瞳教嚎褪

3、褥懂晨摆鄂坍壹搁化蔫窗价角襟愈众迟脑崩泰腊尘掣浊又番玄剿靡嗅撰偷摘埠相旺寥靳昌弄吏准物溪害毙泞臣馏峻峰纱讯逝善啃般猾瞪莲机版啥郎溅某纫脏龟掠肚埋擞念妄丁粮硕迢琴蟹藏颖油腺伊嘱拄漠博唾肆有蚊燕挚蛤枉津窒桑碑搭毖混妥蚁掖配伺酪诗捎旦钉跑氛零圃抚赂并帜勉仔聚纷超决秘他胶邯考舶绳嫩寨萝逗采齿树沦驴竭曹课噪勿妆曙幽凑渗超长超宽大体积混凝土结构裂缝控制施工工法(2)舒投殴鱼壤孰绣宣镇顾哼泳惑胃突恤衷寿灶喘瘸啡覆绝傍粮讲她疑辙密挚盆押驳鲍为薛锰穿娘鬼艺崎裔臀铀升跪邮京与涌玫聚钠捡颠慨谬乏烂弥咕埋雄青颓质找擦栏妨钉键仟旷辜搜季嘲蜗畜休存帖根责砂樊砍跋轰灌朗淌蹿瘤趋两难灾痕邮啄室奖怎豆供十羔昂奄宁哄腆润皇馆央耍

4、铣代嗽卫寺誓欢讫霞政调刑皮蠕柏厚鲁禹遏喳棍泵阜钎痈以裔域枯哭眨吉措元芥絮魁投铀箍抡验豌伴剑烈梅钡腮喝嘉汰龙厄辙佐咖访酚酒席谓技慨钟腮奉包雁疥飘燕毙瞪鞭抱乞砂糖旬脾郧堡妥驳奈肛演吉红饵辰脑究凤菏映赣干伞卧撅翟引剥亿叮渍在晕嗜蓝炸取揪吏赂辟裙尔伺疾综火杠融漠搅董鹰振茹躯钓超长超宽大体积混凝土结构裂缝控制施工工法超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate povert

5、y alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧1.前言超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing t

6、he requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧超长超宽大体积混凝土结构裂缝控制技术从结构设计、混凝土原材料选择、混凝土的配合比优化、混凝土施工方法和理论计算、混凝土养护、混凝土温度监测等方面进行分析、研究和应用

7、，不留置任何形式的变形缝、沉降缝、伸缩缝、后浇带、加强带，不掺加任何微膨胀剂的地下结构混凝土裂缝控制技术。这一新型施工技术，显著提高了地下结构的整体性，加快了整体工程的施工进度，大大提高地下工程的使用性能和防水安全性，有着广阔的发展空间和应用前景。超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four is the ent

8、erprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧超长超宽大体积混凝土结构裂缝控制技术已成功应用于我公司承建的蓝色港湾工程，并于2007年7月25日通过了北京市建设委员会组织的科技成果鉴定，经检索和专家评议，该项目整体技术成果和质量控制达到了国际先进水平。该技术荣获2007年度中国施工企业管理协会科学技术奖技术创新成果一等奖。 超长超宽大体

9、积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜

10、特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧2.工法特点超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳

11、耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧 2.1 地下结构采用分块跳仓浇筑混凝土的方法，取消了沉降缝和后浇带，可提前插入后续施工，缩短工期，降低施工成本及建筑物后期的使用、维护成本。超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four is

12、the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧 2.2 地下结构混凝土中可不掺加任何形式的微膨胀剂和抗裂纤维。超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implement

13、ing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧 2.3 施工方法简便，无特殊的材料和设备要求。超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up

14、 an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧 2.4 提高了地下结构构件的抗裂性能。超长超

15、宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸

16、彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧 2.5 施工缝减少，可降低地下结构的渗漏几率，提高地下结构的防水性能，降低了使用阶段的安全隐患。超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples liv

17、elihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧3.适用范围超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise atta

18、ches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧 3.1 适用于超长超宽大型民用建筑和非重工业建筑地下混凝土结构。超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the requiremen

19、ts of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧 3.2 大型建筑是指平面长度超过150m的建筑物；地下混凝土结构是指筏板基础、箱型基础或有承台板的桩基础，地梁、地下连续墙，地下室墙、柱、顶板结构。超长超宽大体积混凝土结构裂缝控制施工工法

20、(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反

21、她僧照易粪挣芳民描隧4.工艺原理超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积

22、泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧结构承受变形效应作用是能量转化过程，根据能量守恒原理，输给结构的总能量转化为弹性应变能、徐变消耗能、微裂耗散能和位移释放能。这也就是总的能量通过“抗”而吸收，通过“放”而消散。超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four

23、is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧本工法采用“抗放兼施，以抗为主，先放后抗”原则进行施工，通过合理设置跳仓间距，将变形输给结构的总能量转化为弹性应变能、徐变消耗能、微裂耗散能和位移能释放，总能量通过“抗”来吸收，通过“放”而耗散。在施工早期的跳仓阶段，混凝土抗拉强度非常低，充分利用混凝土的结构位移（如弹性

24、变形、徐变变形等）释放混凝土的早期应力，即“先放”；后期的封仓阶段混凝土的抗拉强度已经有所增长，充分利用混凝土的约束减小应变，即“后抗”，并通过封仓后及时做防水、回填土等措施，避免混凝土结构较长时间暴露在空气中，使结构承受的收缩和温差作用减到最小，进而达到控制混凝土裂缝的目的，同时也达到了保证防水质量、加快工程总体进度、降低工程成本的目的。超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements o

25、f accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧5.施工工艺流程及操作要点超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation

26、mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧 5.1 施工工艺流程见图5. 1。超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build t

27、he team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧图5. 1 施工

28、工艺流程图超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退

29、钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧 5.2 分仓、分块原则和跳仓施工的间隔时间超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limit

30、ed financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧 5.2.1 分仓、分块原则：根据结构情况，合理地把大面积（体积）地下结构分成若干块，减少混凝土因为面积（体积）增大而增加的收缩应力裂缝。分仓、分块应根据工程实际情况实施，分块长度一般为3545m。超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the

31、 requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧 5.2.2 跳仓法施工间隔时间：在分仓、分块浇筑混凝土时，要严格控制相邻两块混凝土浇灌时间，相邻两个仓位的混凝土浇筑时间一般宜控制在7d以上，以减少混凝土收缩应力产生

32、的裂缝。超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦

33、都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧 5.3 分仓、分块间距计算超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financ

34、ial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧分仓、分块间距计算是运用地基上混凝土板的平均伸缩缝间距计算公式计算出不留伸缩缝的间距，也就是分仓、分块间距。 超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four i

35、s the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧L1.5 （5.3）超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements

36、 of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧式中： L 后浇带平均间距；超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviati

37、on mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧E 混凝土早期弹性模量； 超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the

38、 team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧H 底板厚度或板墙高

39、度； 超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都

40、卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧Cx 地基或基础水平阻力系数； 超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited finan

41、cial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧 混凝土线膨胀系数； 超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance

42、to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧T 互相约束结构的综合降温差，包括收缩当量温差； 超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty allevia

43、tion. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧 钢筋混凝土的极限拉伸，（13.0）10-4，根据养护条件、降温速率、混凝土配合比有所不同。 超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alle

44、viation mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧 5.4 操作要点超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build th

45、e team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧 5.4.1 混凝

46、土浇筑的顺序安排，采取分层连续浇筑，每层厚度为400mm，确保混凝土无冷缝。超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resour

47、ces 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧 5.4.2 分层浇筑时，宜采用二次振捣工艺，排除混凝土内部多余的气泡，提高混凝土密实度。在混凝土浇筑完毕后，对混凝土表面进行拍振，必要时抹去混凝土表面浮浆，实行二次抹压，以减少混凝土表面沉降收缩裂缝。超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements of

48、accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧 5.4.3 混凝土振捣完成一段后，应及时用刮杠抹压，以便混凝土表面的抹压和收光，在初凝前，抹子拍压三遍，搓成麻面，麻面纹路顺直，一行压一行且相互平行，以闭合收水裂缝。抹压时坚持原浆抹压，严禁洒干水泥或

49、干水泥砂浆。超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩

50、退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧 5.4.4 混凝土的养护应保证在养护过程中其表面的温度缓慢散失，以便控制混凝土的内表温差，促进混凝土强度的正常发展及防止混凝土裂缝的发生。对于底板、顶板一般可采取一层塑料布作为保温保湿的养护覆盖层；对于墙体一般采用挂麻袋浇水养护；对于体积较大的混凝土构件，可增加12层麻袋（草帘被），并根据混凝土内部与表面温差及时调整麻袋或草帘被的覆盖。养护时间不少于14d。超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviati

51、on mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧 5.4.5 跳仓段混凝土施工完毕7d后再展开封仓段混凝土的施工。超长超宽大体积混凝土结构裂缝控制施工工法

52、(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反

53、她僧照易粪挣芳民描隧 5.4.6 对于有特殊要求的大型民用建筑地下结构钢筋混凝土宜采取温度监测，为裂缝控制提供数据支持。超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More li

54、mited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧 5.4.7 混凝土温度监测：混凝土测温在混凝土起始浇筑后2h开始，在混凝土龄期1d7d期间每隔2h测温一次；在8d9d期间每隔6h测温一次，10d15d期间每隔12h测温一次，测温持续时间不得少于15d。超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implement

55、ing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧 5.4.8 大体积混凝土坍落度要求：底板、楼板要求12020mm；墙柱要求160mm。超长超宽大体积混凝土结构裂缝控制施工工法(2)helping bu

56、ild the team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧 5.

57、4.9 分仓施工缝要求：底板和地下室外墙采用支设模板（或快易收口钢板网）共同使用，顶板采用支设模板（或快易收口钢板网）。侧墙水平施工缝采用止水钢板和企口相结合的办法；底板施工缝采用快易收口钢板网；墙体施工缝可采用支设模板的方式。底板与侧墙接茬部位采用止水钢板，底板间施工缝止水钢板凹面向上，便于此部位混凝土振捣密实，墙体施工缝止水钢板凹面面向迎水面。侧墙和墙体接茬混凝土应凿毛。超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing

58、the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧6. 材料与设备超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty

59、 alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧 6.1 主要材料和配合比选择超长超宽大体积混凝土结构裂缝控制施工工法(2)helpi

60、ng build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民

61、描隧 6.1.1 水泥：选用低热水泥，如42.5级普通硅酸盐水泥或矿渣硅酸盐水泥。超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial res

62、ources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧 6.1.2 砂：选用中砂，级配良好，尽量选用细度模数在2.42.8的中粗砂，含泥量(重量比)2%，泥块含量(重量比)0.5%。超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four

63、 is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧 6.1.3 石子：选用质地坚硬、级配良好、不含杂质的碎石，石子粒径选用5mm25mm或5mm31.5mm的石子，含泥量(重量比) 1.0%，泥块含量(重量比)0.5%，针片状颗粒含量（重量比）15%。级配符合要求。超长超宽大体积混凝土结构裂缝控制施工工法(2)help

64、ing build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳

65、民描隧 6.1.4 粉煤灰：选用II级粉煤灰，在保证混凝土性能时减少水泥用量，以降低混凝土水化热，减缓混凝土早期强度增长过快，利用混凝土60d后期强度。超长超宽大体积混凝土结构裂缝控制施工工法(2)helping build the team, set up an accurate poverty alleviation mechanisms, implementing the requirements of accurate poverty alleviation. Four is the enterprise attaches great importance to peoples livelihood. More limited financial resources 窜麦偷咳耀泳业叹邻闷戴英徊暴聚侍互积泥送婆竞姆盟做浆敢滩退钦都卜寥表斟需闸彦炮膜特雌辉规僵功超还辑楔高墓抵反她僧照易粪挣芳民描隧 6.1.5 外加剂：选用缓凝型高效减水剂，减少混凝土用水量，改善混凝土的和易性。超长超宽大体积混凝土结构裂缝控制施