超长环形大体积防微振地基混凝土的研究与工程应用  

RESEARCH AND ENGINEERING APPLICATION OF ULTRA-LONG ANNULAR MASS FOUNDATION CONCRETE PREVENTING MICRO-VIBRATION

作　　者：杨柳 金鹭云 杨家琦 冯鹏[3] 任锦龙 张健 YANG Liu;JIN Lu-yun;YANG Jia-qi;FENG Peng;REN Jin-long;ZHANG Jian(BCEG Advanced Construction Materials Co.,Ltd.,100015,Beijing,China;School of Mechanics and Civil Engineering,China University of Mining and Technology-Beijing,100083,Beijing,China;Tsinghua University,100084,Beijing,China;Beijing Construction Engineering Group Co.,Ltd.,100055,Beijing,China;Beijing International Construction Group Co.,Ltd.,100054,Beijing,China)

机构地区：[1]北京建工新型建材有限责任公司,北京100015 [2]中国矿业大学(北京)力学与建筑工程学院,北京100083 [3]清华大学,北京100084 [4]北京建工集团有限责任公司,北京100055 [5]北京国际建设集团有限公司,北京100054

出　　处：《建筑技术》2021年第9期1028-1032,共5页Architecture Technology

摘　　要：为满足超长环形大体积地基混凝土的防微振技术要求,分析混凝土裂缝对结构振动特性的影响,配制防微振混凝土并计算防微振混凝土最大浇筑尺寸。基于绝热温升指标的配合比正交设计确定其基准参数为:水胶比0.66、胶材总量250 kg/m^(3)、掺合料掺量66%。从混凝土强度和收缩方面优化基准配合比,确定配合比为m(水泥):m(粉煤灰):m(矿粉):m(砂):m(石)=1:1.4:0.5:8.75:10.7,水胶比为0.57。大体积换填混凝土的最长尺寸不超过20 m时,其各项指标均满足工程需求。In order to meet the technical requirements for preventing micro-vibration of the ultra-long annular mass foundation concrete,the influence of concrete cracks on structural vibration characteristics was analyzed,the concrete preventing micro-vibration was prepared,and the maximum pouring size was calculated.Based on the orthogonal design of the mixing ratio of the adiabatic temperature rise index,the datum parameters were determined as follows:the water binder ratio is 0.66,the total amount of cementitious materials was 250 kg/m^(3),and the proportion of admixture was 66%.The datum mixing ratio was optimized from the aspect of concrete strength and shrinkage,the mixing ratio was determined as:m(cement):m(fly ash):m(mineral powder):m(sand):m(stone)=1:1.4:0.5:8.75:10.7,and the water binder ratio was 0.57.When the longest size of mass replacement concrete did not exceed 20 m,all indexes met the engineering requirements.

关 键 词：防微振混凝土 振动特性 配合比设计 

分 类 号：TU74[建筑科学—建筑技术科学]