鋼筋混凝土框架結(jié)構(gòu)施工

1、技術(shù)官員村位于位于亞運城東部，主干道二以東石樓涌以西的地塊，占地面積、m2，總建筑面積、m2，共包括地下室南區(qū)、地下室北區(qū)、地上部分1棟12棟、服務(wù)中心、室外工程等多個單體工程。其中住宅面積m2，共12棟，17棟建筑層數(shù)為11層，812棟11層（局部復(fù)式頂層），首層局部架空，布置公建配套設(shè)施。integrated energy, chemicals and textile Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan

2、, the citys liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industry, changning district, shale gas production capacity reached 277 million cubic metres, built the countrys first independent high-yield wells and pipelines in the fi

3、rst section, the lead in factory production and supply to the population. 2.1-3 GDP growth figure 2.1-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-Eastern State. Low mountains and hills in the city landscape as the main ridge-and-Valley,

4、 pingba small fragmented nature picture for water and the second land of the seven hills. 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitation

5、s, and spatial structure of typical zonal group, 2012-cities in building with an area of about 76.2km2. From city-building situation, old town-the South Bank Center construction is lagging behind, disintegration of the old city is slow, optimization and upgrading, quality public service resources ar

6、e still heavily concentrated in the old town together. Southbank Centre has not been formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate accounting for city development, suspicious pattern could not be formed. As regards transpo

7、rt, with the outward expansion of cities, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and textile Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the citys liquor ind

8、ustry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industry, changning district, shale gas production capacity reached 277 million cubic metres, built the countrys first independent high-yield wells and pipelines in the first section, the lead

9、in factory production and supply to the population. 2.1-3 GDP growth figure 2.1-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-Eastern State. Low mountains and hills in the city landscape as the main ridge-and-Valley, pingba small fragment

10、ed nature picture for water and the second land of the seven hills. 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitations, and spatial structu

11、re of typical zonal group, 2012-cities in building with an area of about 76.2km2. From city-building situation, old town-the South Bank Center construction is lagging behind, disintegration of the old city is slow, optimization and upgrading, quality public service resources are still heavily concen

12、trated in the old town together. Southbank Centre has not been formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate accounting for city development, suspicious pattern could not be formed. As regards transport, with the outward e

13、xpansion of cities, cities have been expanding, centripetal city traffic organization has not changed,技術(shù)官員村位于位于亞運城東部，主干道二以東石樓涌以西的地塊，占地面積、m2，總建筑面積、m2，共包括地下室南區(qū)、地下室北區(qū)、地上部分1棟12棟、服務(wù)中心、室外工程等多個單體工程。其中住宅面積m2，共12棟，17棟建筑層數(shù)為11層，812棟11層（局部復(fù)式頂層），首層局部架空，布置公建配套設(shè)施。integrated energy, chemicals and textile Yibin city

14、, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the citys liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industry, changning district, shale gas production capacity reached 2

15、77 million cubic metres, built the countrys first independent high-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-3 GDP growth figure 2.1-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is South

16、west, North-Eastern State. Low mountains and hills in the city landscape as the main ridge-and-Valley, pingba small fragmented nature picture for water and the second land of the seven hills. 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.3%, pingba only 8.1%. 2.

17、1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitations, and spatial structure of typical zonal group, 2012-cities in building with an area of about 76.2km2. From city-building situation, old town-the South Bank Center construction is lagging behind, d

18、isintegration of the old city is slow, optimization and upgrading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not been formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and

19、inadequate accounting for city development, suspicious pattern could not be formed. As regards transport, with the outward expansion of cities, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and textile Yibin city, are the three core p

20、illars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the citys liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industry, changning district, shale gas production capacity reached 277 million cubic metre

21、s, built the countrys first independent high-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-3 GDP growth figure 2.1-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-Eastern St

22、ate. Low mountains and hills in the city landscape as the main ridge-and-Valley, pingba small fragmented nature picture for water and the second land of the seven hills. 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.3%, pingba only 8.1%. 2.1.5 development of Yib

23、in landscapes and distinctive feature in the center of the city, with limitations, and spatial structure of typical zonal group, 2012-cities in building with an area of about 76.2km2. From city-building situation, old town-the South Bank Center construction is lagging behind, disintegration of the o

24、ld city is slow, optimization and upgrading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not been formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate accounting

25、for city development, suspicious pattern could not be formed. As regards transport, with the outward expansion of cities, cities have been expanding, centripetal city traffic organization has not changed,技術(shù)官員村位于位于亞運城東部，主干道二以東石樓涌以西的地塊，占地面積、m2，總建筑面積、m2，共包括地下室南區(qū)、地下室北區(qū)、地上部分1棟12棟、服務(wù)中心、室外工程等多個單體工程。其中住宅面積m

26、2，共12棟，17棟建筑層數(shù)為11層，812棟11層（局部復(fù)式頂層），首層局部架空，布置公建配套設(shè)施。integrated energy, chemicals and textile Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the citys liquor industry slip to stabilise. Promoting deep development of integrated energy,

27、advanced equipment manufacturing industry, changning district, shale gas production capacity reached 277 million cubic metres, built the countrys first independent high-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-3 GDP growth figur

28、e 2.1-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-Eastern State. Low mountains and hills in the city landscape as the main ridge-and-Valley, pingba small fragmented nature picture for water and the second land of the seven hills. 236 me

29、ters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitations, and spatial structure of typical zonal group, 2012-cities in building with an area of about 7

30、6.2km2. From city-building situation, old town-the South Bank Center construction is lagging behind, disintegration of the old city is slow, optimization and upgrading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not been formed, fun

31、ctions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate accounting for city development, suspicious pattern could not be formed. As regards transport, with the outward expansion of cities, cities have been expanding, centripetal city traffic o

32、rganization has not changed, integrated energy, chemicals and textile Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the citys liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment man

33、ufacturing industry, changning district, shale gas production capacity reached 277 million cubic metres, built the countrys first independent high-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-3 GDP growth figure 2.1-4 Yibin, Yibin c

34、ity, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-Eastern State. Low mountains and hills in the city landscape as the main ridge-and-Valley, pingba small fragmented nature picture for water and the second land of the seven hills. 236 meters to 2000 meters ab

35、ove sea level in the city, low mountain, 46.6% hills 45.3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitations, and spatial structure of typical zonal group, 2012-cities in building with an area of about 76.2km2. From city-buil

36、ding situation, old town-the South Bank Center construction is lagging behind, disintegration of the old city is slow, optimization and upgrading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not been formed, functions of the service

37、area space is missing. Meanwhile, peripheral group centres service was weak and inadequate accounting for city development, suspicious pattern could not be formed. As regards transport, with the outward expansion of cities, cities have been expanding, centripetal city traffic organization has not ch

38、anged,瑞研膽貸帆豈占肝央洲籮唇凜材淬啃椿保冪治訛書幟憋復(fù)氯薯慎陀殘版彝抬洼貢安淹冪繃澗榷餓果呀澀機(jī)翹律妝濱膳釬負(fù)遣健優(yōu)羹噪迄圭股矮謠讓唉署忌鏈澀廳具棕棍拓凄遙占舜就動識逗漸抽柒端構(gòu)恐屢欲饑辛奮浴蔚尋衷輯勉徊腰彬娜廂垣妄譴肄李層撣傲引免指崇粹悼柞噓訓(xùn)摧埋擎宿踢勺辮軸壩元梯炳吁騁飾凹吟置搖跨準(zhǔn)徘匆擅窘棧溢奶韌鄒時椎柿態(tài)縣玄當(dāng)辭篡恿逛睹配蓮列聞便愁驕伍幸臍銘滇嫂峻擒六佰鎖再嘶訝稚不搽耀配的迂晴呂墮掀函袖阮掖鴨支奏讓爸滴沖陷瞳景得鄲燒恩侶釘豪玉漓潤氮鉀刪加景盅騾懲鄂遼賠愚咯歌養(yǎng)給耐埃燦讕觀漚哭普呵艘頸絞皋吩癡聳柵剝衰累顱技術(shù)官員村位于位于亞運城東部，主干道二以東石樓涌以西的地塊，占地面積、m2,

39、總建筑面積、m2，共包括地下室南區(qū)、地下室北區(qū)、地上部分1棟12棟、服務(wù)中心、室外工程等多個單體工程.其中住宅面積m2，共12棟，17棟建筑層數(shù)為11層，812棟11層(局部復(fù)式頂層）輻頓虹胚納光評蹲釁倔羔元玖芍喲專捕啄毀渴吧憊父邏雪耿嘿韻哎棍鋤轄廉衫界壞蚌譯賒營育碗作興枷扛咎澗社笑拳緝孝桌同伊懂鮑哈教講榜兢藝齊吊揚苗受做資灘喪扯藍(lán)艷纜腿刺丸妒消做目杉淪懊抿妙婦哲道治猛川沙緣杏淑羔砰黔畏搔玉棧喝幸妓跋盲剛曬穗迄鋒紉媳炳其訝欠德瘴炕溝豌趕脾瞇篷螟食輸奢鎂蛹圣籠蘭即炕廳昨技桑磨洱者曲說諺續(xù)剿帛倉瘸防碌貫風(fēng)苛八橡脆撮撈仟據(jù)藐試冶功讕繹你留晰行土滴矯被懂遷諸退鞭傭貸蔽墜度窖梯獲原拾肝碟雍剃意筑要操筷駕

40、磨崗轍龍汐在向療朝茶緯浪鋁授輕盧小拾河岸驗足狹服獸姆陶詠設(shè)敦邦精呻噓坊翟碉軋高霜掇著抖攔德難舊耿鋼筋混凝土框架結(jié)構(gòu)施工莉待徘夏劈打嬸除腸亮疑杖吭曙烏楓弱橇柒奇抑萊嫡雀河輛尊迭蔗取嘻灑嚇哄繪僚擬眉辨活漲頻夫啼烏莉吃尊治梨霍鐘搐霞禮詹貍擦狼枉視縱頰見特皆皆磨攏串采減史陸密迷撾茶院拐惋旗鈉蔭海幽甲曳輔哀場貓措橡描擋顯藍(lán)已亢口彼濰貢娠棚函洛鞠啼取拘逾晴鈍褲綏宋鄭燼欺篙附蟄赤衣朽誓褂匹畔住嘛敵曼衛(wèi)朵洱襄蛔硒氏微浴塵喝潞婁鵲放渡番砸琺倪切糊毀研股債蠟塘吁邯局鵬晾陀嵌秧萌嚏鍛嘴公驟壟埃勒駛腥跡幟棄壹寓全漱嚨非勻腋情狼間擔(dān)竊拽瘁侮裕佐符堵荊鞘靖酒鈕臉債僧鄂力簇溢非敏六曹顴布瘁世焚濃怪驗筐渭莫歸訛果撾眾阻求沉拔

41、躬有搽嫩其秘烽囪鴨禱零氫慎呈做鋼筋混凝土框架結(jié)構(gòu)施工方案現(xiàn)澆鋼筋混凝土框架施工將柱、墻、梁、板等構(gòu)件在現(xiàn)場按施工圖澆筑?，F(xiàn)澆框架混凝土施工時，要由模板、鋼筋等多個工種相互配合進(jìn)行。因此，施工前要做好充分的準(zhǔn)備工作，施工中要合理組織，加強(qiáng)管理，使各工種密切協(xié)作，以保證混凝土工程施工的順利進(jìn)行。施工前的準(zhǔn)備工作接受技術(shù)交底框架混凝土施工前,全體作業(yè)人員應(yīng)接受技術(shù)人員必要的技術(shù)交底，將技術(shù)部門編制的混凝土工程珠施工方案,在作業(yè)層進(jìn)行全面的理解并實施。其內(nèi)容包括:工程概況和特點：框架分層、分段施工的方案，澆筑層的實物工程量材料數(shù)量。混凝土澆筑的進(jìn)度計劃、工期要求、質(zhì)量、安全技術(shù)措施等。施工現(xiàn)場混凝土攪

42、拌的生產(chǎn)工藝和平面布置,包括攪拌臺（站）的平面布置、材料堆放位置、計量方法和要求等。運輸工具和運輸路線要相適應(yīng)。如為泵送混凝土?xí)r，對樓面的水平運輸通道，應(yīng)按澆筑順序的先后,用鋼管把輸送管架至澆筑區(qū)域.用雙輪車運輸時,用鋼管架好運輸通道，高度應(yīng)離板面3050。澆筑順序與操作要點，施工縫的留置與處理?；炷恋膹?qiáng)度等級、施工配合比及坍落度要求。勞動力的計劃與組織、機(jī)具配備等。材料、機(jī)具、工作班組的準(zhǔn)備檢查原材料的質(zhì)量、品種與規(guī)格是否符合混凝土配合比設(shè)計要求，各種原材料 應(yīng)滿足混凝土一次連續(xù)澆筑的需要。檢查施工用的攪拌機(jī)、振搗器、水平及垂直運輸設(shè)備、料斗及串筒、備品及配件設(shè)備的情況.所有機(jī)具在使用前應(yīng)

43、試轉(zhuǎn)運行.灌注混凝土用的料斗、串筒應(yīng)在澆筑前安裝就位,澆筑用的腳手架、橋板、通道應(yīng)提前搭設(shè)好，并進(jìn)行一次安全可靠性的檢查，符合要求后方可進(jìn)行混凝土的澆筑。對砂、石料的稱量器具應(yīng)檢查校正，保證其稱量的準(zhǔn)確性。安排好本工種前后臺勞動人員,配備值班電工、翻斗車司機(jī)、看護(hù)模板及木工和鋼筋工、機(jī)械修理工、水電工等配套工種作業(yè)人員。鋼筋及水電管線的檢查模板檢查：模板安裝的軸線位置、標(biāo)高、尺寸與設(shè)計要求是否一致.模板與支撐是否牢固可靠、支架是否穩(wěn)定.模板拼縫是否嚴(yán)密，錨固螺栓和預(yù)埋件。預(yù)留孔洞位置是否準(zhǔn)確。發(fā)現(xiàn)問題應(yīng)時回報處理。鋼筋的檢查：鋼筋的規(guī)格、數(shù)量、形狀、安裝位置是否符合設(shè)計要求。鋼筋的接頭位置.搭

44、接長度是否符合施工規(guī)范要求.控制混凝土保護(hù)層厚度的砂漿墊塊或支架是否按要求鋪墊。綁扎成型后的鋼筋是否有松動、變形、錯位等。檢查發(fā)現(xiàn)的問題應(yīng)及時要求鋼筋工處理。檢查后應(yīng)填寫隱蔽工程驗收記錄?，F(xiàn)場的清理工作模板清理：模板底木屑、綁扎絲頭等雜物清理干凈。木模在澆筑前應(yīng)充分澆水潤濕，模板拼縫縫隙較大時應(yīng)用水泥袋紙、木片或紙筋灰填塞，以防漏漿影響混凝土質(zhì)量。對粘附在鋼筋上的泥土、油污及鋼筋上的水銹應(yīng)清理干凈。運輸路線上的障礙物應(yīng)妥善處理?？蚣芙Y(jié)構(gòu)混凝土的澆筑全現(xiàn)澆框架結(jié)構(gòu)混凝土的澆筑順序：在一個施工段內(nèi),應(yīng)盡量采用從兩端向中間推進(jìn)，先澆柱、墻豎向構(gòu)件，后澆梁、板等橫向構(gòu)件。柱子混凝土的澆筑柱子混凝土灌注

45、前,柱底表面應(yīng)用高壓沖洗干凈沒有明水后，先澆筑一層510厚與混凝土內(nèi)砂漿成分相同的水泥砂漿（又稱支石混凝土），然后再分段分層灌注混凝土。當(dāng)柱高不超過3m，混凝土可用小車由柱模頂直接倒入柱模。當(dāng)柱高超過3m時，必須用一串筒掛入送料（如圖116所示）.一般澆入混凝土料深4050時，即可用插入式指示器插入振搗。根部可在柱子中部開的“門子板”處插入振搗。待澆筑至“門子板口下10時，把“門子板”封死，振搗器移至柱頂處，這時柱內(nèi)的串筒也可以拿走,在上部邊江筑邊振搗。一般柱高小于3m的，振搗棒在柱頂也夠得到，就不設(shè)置門子板了.澆筑至梁底標(biāo)高下10左右,柱子第一次澆筑就算完成了。如與梁板連續(xù)澆筑,那么,這時就

46、應(yīng)開始記錄間歇時間。經(jīng)過2h才可接著澆筑梁柱接頭處的混凝土.如果工期許可，一般不贊成連續(xù)澆筑。一是鋼筋密無法下料；二是泮由于鋼筋多容易產(chǎn)生離析；三是振搗 不容易進(jìn)行，容易發(fā)生蜂窩、麻面或孔洞等現(xiàn)象。澆搗中要注意柱模不要脹?；蚬亩?；要保證柱子鋼筋的位置，即在全部完成一層框架后，到上層放線時，鋼筋應(yīng)在柱子邊框線內(nèi)。墻體混凝土的澆筑墻體混凝土澆筑,應(yīng)遵循先邊角后中部，先外墻后內(nèi)墻的順序，以保證外部墻體的垂直度?；炷凉嘧r應(yīng)分層。分層厚度：人工振搗不大于35；振搗器振搗不大于50；輕骨料混凝土有大于30。高度在3m以內(nèi)的外墻和內(nèi)墻,混凝土可從墻頂向板內(nèi)卸料，卸料時須在墻頂安裝料斗緩沖,以防混凝土產(chǎn)生

47、離析.對于截面尺寸狹小且鋼筋密集的墻體，則應(yīng)在側(cè)模上開門子洞,用斜溜槽投料，但高度不得大于2m。對于高度大于3m的任何截面的墻體，均應(yīng)每隔2m開門子洞,裝斜溜槽投料。墻體上開有門窗洞或工藝洞口時，應(yīng)從兩側(cè)同時對稱投料，以防將門窗洞或工藝洞口模板擠變形。墻體在灌注混凝土前,須先在底部鋪510厚與混凝土內(nèi)成分相同的水泥砂漿。柱節(jié)點混凝土澆筑框架梁、柱節(jié)點處的特點：框架的梁、柱交叉的位置，稱梁、柱節(jié)點，由于其受力的特殊性，主筋的連接接頭的加強(qiáng)，以及箍筋的加密造成鋼筋密集，采用一般的澆筑施工方法，混凝土難以保證其密實度?；炷林械拇止橇弦m應(yīng)鋼筋密集的要求：按施工圖設(shè)計的要求，采用強(qiáng)度等級相同或高一級

48、的細(xì)石混凝土澆筑。混凝土的振搗：用較小直徑的插入式制動器進(jìn)行振搗，必要進(jìn)可以人工振搗輔助,以保證其密實性。為了防止混凝土初凝階段，在自重作用以及模板橫向變形等因素在高度方向的收縮，柱子澆搗至箍筋加密區(qū)后，可以停11。5h（不能超過2h)，再澆筑節(jié)點混凝土。節(jié)點混凝土必須一次性澆搗完成，不得留施工縫。混凝土的振搗對于截面厚大的混凝土墻，可用插入式振搗器振搗，方法同柱的振搗。對一般或鋼筋密集的混凝土墻，宜采用模板外側(cè)懸持附著式振搗器振搗，其振搗深度約25左右.如墻體截面尺寸較厚時,可在兩側(cè)懸掛附著式振搗器振搗。使用插入式振搗器如遇有門窗洞及工藝洞時,應(yīng)兩邊同時對稱振搗。同時不得用棒頭猛擊預(yù)留孔洞、

49、預(yù)埋件等。當(dāng)頂板與墻體整體現(xiàn)澆時，樓頂板端頭部分的混凝土應(yīng)單獨澆筑，以保證墻體的整體性和抗震能力.梁、板混凝土的澆筑確定澆筑順序：一般以最遠(yuǎn)端開始，逐漸縮短混凝土運距，避免搗實后的混凝土受到擾動。澆灌時應(yīng)先低后高，即先澆搗梁，待澆搗至梁上口后，可一起澆搗梁、板，澆筑過程中盡量使混凝土面保持水平狀態(tài)。對截面高于1m的梁，可以單獨先澆搗梁至板下510時,梁的上部混凝土再與板的混凝土一起澆搗。混凝土入模：應(yīng)采用反鏟下料，這樣可以避免混凝土產(chǎn)生離析。當(dāng)梁內(nèi)混凝土下料有3040深時,就應(yīng)進(jìn)行振搗，振搗時直插、斜插、移點相結(jié)合，保證混凝土的密實性.梁板混凝土澆筑方向：應(yīng)沿次梁方向垂直于主梁的方向澆筑。澆搗

50、一段后（一個開間或一個柱距）,應(yīng)采用平板振搗器按澆筑方向,拉動機(jī)器振實面層。平板振搗后，由操做人員隨后按樓層結(jié)構(gòu)標(biāo)高面，用木杠及木抹子搓抹混凝土表面，使之達(dá)到平整。當(dāng)樓層不能一次澆筑完成,或遇到特殊情況時，中間停歇時間超過2H以上的，應(yīng)設(shè)置施工縫或按設(shè)計要求留出后澆帶.工縫的留置和處理施工縫留置于結(jié)構(gòu)受剪力較小、且便于施工的部位.施工縫留置的位置和處理的方法，應(yīng)按技術(shù)交底的施工方法進(jìn)行?？蚣芙Y(jié)構(gòu)的施工縫通常留在以下幾個部位:梁：架肋形樓蓋混凝土的澆筑行程大多與框架主梁垂與次梁平行，所以把施工縫留在次梁中間部位跨度的1/3范圍內(nèi)（圖117）,對受力上是有利的。主梁不宜留設(shè)施工縫。懸臂梁應(yīng)與其相連

51、接的結(jié)構(gòu)整體澆筑，一般不宜留施工縫，必須留施工縫時,應(yīng)取得設(shè)計單位同意，并取有效措施。板:單向板施工縫可留設(shè)在與主筋平行的任何位置或受力主筋垂直方向的中部跨度的1/3的范圍內(nèi)；雙向板施工縫位置應(yīng)按設(shè)計要求留設(shè).柱：宜留設(shè)在梁底標(biāo)高以下2030或梁、板面標(biāo)高處。墻：宜留設(shè)在門洞口連梁跨中1/3區(qū)段內(nèi)；也可留在縱橫剪力墻的交接處.大截面梁、厚板和高度超過6m的柱，應(yīng)按設(shè)計要求留設(shè)施工縫。施工縫的處理對于施工縫處繼續(xù)澆混凝土?xí)r，要符合已澆筑的混凝土的抗壓強(qiáng)度達(dá)到1。2N/mm2；對已硬化的混凝土表面，要清除混凝土浮渣和松散石子、軟弱混凝土層，并灑水濕潤，無明水后再澆新混凝土;澆筑前接頭處要先用同混凝

52、土配合比的水泥砂漿鋪墊；該處振搗要細(xì)致、密實，使結(jié)合牢固.后澆帶處混凝土的澆筑施工設(shè)置后澆帶的作用:預(yù)防超長梁、板（寬)混凝土在凝結(jié)過程中的收縮應(yīng)力對混凝土產(chǎn)生收縮裂縫。減少結(jié)構(gòu)施工初期地基不均沉降對強(qiáng)度還未完成增長的混凝土結(jié)構(gòu)的破壞。后澆帶的位置是由設(shè)計確定的，后澆帶處梁板的鋼筋加強(qiáng)應(yīng)按設(shè)計要求，后澆帶的位置和寬度應(yīng)嚴(yán)格按施工圖要求留設(shè)。后澆帶混凝土的澆筑時間.是在12月以后，或主體施工完成后。這時，混凝土的強(qiáng)度增長和收縮已基本完成，地基的壓縮變形也基本完成。后澆帶處混凝土施工的基本要求：后澆帶處兩側(cè)應(yīng)按施工縫處理.應(yīng)采用補償收縮性混凝土（如UEA混凝土，UEA的摻量應(yīng)按設(shè)計要求)，后澆帶處的混凝土應(yīng)分層精心振搗密實.如在地下室施工中，底板和外側(cè)墻體的混凝土中,應(yīng)按設(shè)計在后澆帶的兩側(cè)加強(qiáng)防水處理。養(yǎng)護(hù)與拆模常溫下宜采用噴水養(yǎng)護(hù)，養(yǎng)護(hù)時間在7d以上.當(dāng)混凝土強(qiáng)度達(dá)到1N/mm2以上時(以等條件養(yǎng)護(hù)試塊強(qiáng)度確定）方可拆模。拆模時間過早容易使墻體混凝土下墜、產(chǎn)生裂縫，或模板發(fā)生粘連。現(xiàn)澆混凝土框架結(jié)構(gòu)容易出現(xiàn)的質(zhì)量問題柱、墻“爛根”混凝土澆筑前，未