探傷室大體積混凝土施工專項(xiàng)方案

1、第1頁共17頁目錄1編制依據(jù)...............................................................................................................................................32工程概述.........................................................

2、......................................................................................33材料要求................................................................................................................................

3、...............33.1混凝土材料要求.......................................................................................................................33.2WGCMA外加劑性能.............................................................

4、................................................33.3混凝土配合比...........................................................................................................................44施工準(zhǔn)備.................................

5、..............................................................................................................45人員和機(jī)械配置.....................................................................................................

6、..............................55.1人員配置...................................................................................................................................55.2機(jī)械及周轉(zhuǎn)材料配置......................................

7、.........................................................................56超厚超高墻體混凝土施工...................................................................................................................66.1混凝土供應(yīng)量.........

8、..................................................................................................................66.2落灰點(diǎn)布置及泵車站位............................................................................................

9、...............66.3澆灌速度...................................................................................................................................76.4振搗............................................................

10、...............................................................................87大體積混凝土施工要點(diǎn).......................................................................................................................88控制溫度裂縫條件

11、的計(jì)算...................................................................................................................98.1混凝土的彈性模量計(jì)算........................................................................................

12、...................98.2混凝土的絕熱溫升計(jì)算...........................................................................................................98.3混凝土收縮相對(duì)變形值的當(dāng)量溫度計(jì)算...........................................................

13、..................108.4溫差計(jì)算.................................................................................................................................118.5溫度應(yīng)力計(jì)算.....................................................

14、....................................................................128.6混凝土防裂性能驗(yàn)算.............................................................................................................139保溫法溫度控制計(jì)算.................

15、........................................................................................................1310裂縫控制措施..........................................................................................................

16、...........................1410.1水泥用量控制.........................................................................................................................1410.2養(yǎng)護(hù)....................................................

17、.....................................................................................1410.3防風(fēng)...............................................................................................................................

18、..........1510.4測(cè)溫.........................................................................................................................................15第3頁共17頁基坑圍護(hù)方案剖面計(jì)算書12Mev探傷室大體積混凝土施工專項(xiàng)方案探傷室大體積混凝土施工專項(xiàng)方案1編制依據(jù)（1）《大

19、體積混凝土施工規(guī)范》GB504962009；（2）《混凝土結(jié)構(gòu)工程施工質(zhì)量驗(yàn)收規(guī)范》GB502042002；（3）《建筑施工計(jì)算手冊(cè)》（江正榮編著）中國建筑工業(yè)出版社2001.72工程概述本工程照射室結(jié)構(gòu)占地面積840m2。墻體厚度在2.1m~3.4m，頂板厚度為1.1m；混凝土等級(jí)C30。按照施工部署，在照射室結(jié)構(gòu)部分分五次施工：第一次施工至0.35m標(biāo)高，混凝土澆筑量850m3；第二次施工至9.000m標(biāo)高，混凝土量約2400m3；

20、第三次施工至14.66m標(biāo)高（即牛腿面上300mm高），混凝土澆筑量1600m3；第四次施工14.66m標(biāo)高以上墻體及1100mm厚頂板，混凝土澆筑量1600m3；第五次施工屋面上900mm高女兒墻。墻體單次澆筑高度最大為8.65m。3材料要求3.1混凝土材料要求混凝土采用普通硅酸鹽水泥，砂石的含泥量不超過1%，水灰比不大于0.55，混凝土密實(shí)性（干容重）不小于23.5KNm3，內(nèi)摻入水泥用量10%的WGCMA外加劑?；炷撂涠纫鬄?/p>

21、15030mm。水泥：選用普通P.O42.5級(jí)（圖紙注明）；砂：選用中砂；碎石：選用5~31.5mm的級(jí)配碎石；要求攪拌站采用水洗，降低石子的含泥量。粉煤灰：選用Ⅱ級(jí)礦粉：選用S95；外加劑：減水劑和WGCMA外加劑。3.2WGCMA外加劑性能（1）在與水泥水化過程中生成的針棒狀產(chǎn)物，能有效的填充在砼的空隙中，受到鋼筋及鄰位的約束，而產(chǎn)生0.2~0.8MPa預(yù)壓應(yīng)力，在砼不同的齡期有不同的抗裂礦相生成，使砼的膨脹增長(zhǎng)曲線與砼強(qiáng)度曲線相協(xié)