天津高银 117大厦多腔体异形钢管混凝土巨型柱 C70大体积 自密实混凝 土单次浇筑体量大,水泥水化放热量巨大 ,造 成混凝土绝热温升高 、里表温差大 ,容易导致混凝土温度应力过大而发生开裂 ,影响巨型柱施工质量及力学性能。依托天津高银 117大厦多腔体异形钢管混凝土巨型柱施工实际,通过模型试验监测分析巨型柱内部混凝土温度场分布规律 ,包括前 3d及 28d 的温度变化 、里表温差 、表外温差 、降温速率 、绝热温升及降温系数 ,为实际施工 中混凝土的热工计算 、施工及养护措施的制定 、低 水化热混凝土的效果验证 、混凝土温度应力及开裂指数的研究提供科学有效的数据,保证了实际施工质量。 关键词:天津高银 117大厦;多腔体异形钢管混凝土巨型柱;C70大体积 自密实混凝土;混凝土温度场 中 图分类 号 :TU528.O1 文 献标志 码 :A 文章 编号 :1002—3550(2015)10—0151—07 Experimentalresearch on thetemperaturefield ofC70 mass self——compacting concrete ofspecial—·shaped multi—cavityconcrete—filledsteel—tubularmegacolumnofTianjinGoldinFinance117Building AIXinying ,HOU Yufie ,yuDihua ,YAN Zhen。,YE胁∞ ,FENG Yuan (1.GeneralConstructionCompanyofCCTEB GroupCo.,Ltd.,Wuhan430064,China; 2.GoldinProperties(Tianjin)LimitedCompany,Tianjin300384,China) Abstract~BecauseofthelargeamountofC70massself——compactingconcreteofspecial——shapedmulti——cavityconcrete——filledsteel—— tubular megacolumnofTianjinGoldinFinance117Building,hydrationheatcausedbycementisintense,whichresultinthatadiabatic tem perature rise and temperaturedifferencebetween surfaceand innerofconcreteofconcrete islarge.Finally,itcan easily lead tO con— cretecrackinginducedby excessivetemperature stressand bring adverse impacton construction qualityand mechanicalproperty of megacolumn.BasedOntheconstructionofspecial—shapedmulti—cavityconcrete—filledsteel—tubularmegacolumnofTianjinGold— inFinance117Building.concretetemperaturefkldinsidemegacolumnismonitoredandanalyzedby modelexperiment.Thestudyin— cludestemperaturevariationofverticalmeasuringpointsafier3 and28days,temperaturedifferencebetweensurfaceandinnerofcon— crete,temperaturedifferencebetweensurfaceandextern alofconcrete,rateoftemperaturefall,adiabatictemperatureriseandcoeficient oftemperaturedrop.Theresearchresultscanprovidescientificandeffectivedataforthermalcalculation,enactmentofconstructionand maintenancemeasures,effectverificationoflow hydrationheatconcrete,studyoftemperaturestressandcrackingindex,alsocanensure theconstructionquality foractualconstruction. Keywords:TianjinGoldinFinance117Building;special—shapedmulti—cavityconcrete—filledsteel—tubular megacolumn;C70 massself—compactingconcrete;concretetemperaturefield
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