地铁车站大体积混凝土温控抗裂防渗性能研究  

Research on temperature-controlled anti-cracking and anti-seepage property of mass concrete in subway stations

作　　者：王德民 谷亚军 郭耀雄 柏严松 梁磊涛 朱国军 李治祥 WANG Demin;GU Yajun;GUO Yaoxiong;BAI Yansong;LIANG Leitao;ZHU Guojun;LI Zhixiang(Wuhan Sanyuan Special Building Materials Co.,Ltd.,Wuhan 430083,China;Suzhou Rail Transit Group Co.,Ltd.,Suzhou 215004,China;China Railway 12th Bureau Group Co.,Ltd.,Taiyuan 030024,China)

机构地区：[1]武汉三源特种建材有限责任公司,湖北武汉430083 [2]苏州市轨道交通集团有限公司,江苏苏州215004 [3]中铁十二局集团有限公司,山西太原030024

出　　处：《混凝土与水泥制品》2024年第5期86-89,93,共5页China Concrete and Cement Products

摘　　要：以苏州某超长地铁车站大体积混凝土工程为依托,研究了温控型钙镁复合膨胀剂对大体积混凝土抗裂防渗性能的影响,分析了大体积混凝土结构不同部位内部温度及应变随时间的变化规律。结果表明:掺入膨胀剂后,大体积混凝土不同部位的抗裂防渗能力大小为基础底板>基础顶板>负一层外墙>负二层外墙;基础顶板温度修正后的应变值大小为上表面>下表面>中心;膨胀剂具有调控水泥水化放热速率和微膨胀补偿收缩的双重作用,可有效提高超长地铁车站大体积混凝土的抗裂防渗性能。Based on the mass concrete project of a super long subway station in Suzhou,the influence of temperature-controlled calcium-magnesium composite expansion agent on anti-cracking and anti-seepage property of mass concrete was studied,and the variation rules of internal temperature and strain with time in different parts of mass concrete structure were analyzed.The results show that after adding the expansion agent,the ability of anti-cracking and anti-seepage of different parts of the mass concrete is foundation slab>foundation roof>negative first-layer external wall>negative second-layer external wall.The strain value after temperature correction of the foundation roof is the upper surface>bottom surface>center.The expansion agent has the dual role of regulating the rate of cement hydration heat release and compensating for micro expansion shrinkage,and it can effectively improve the anti-cracking and anti-seepage property of the mass concrete in super long subway station.

关 键 词：超长地铁车站 大体积混凝土 温控型钙镁复合膨胀剂 抗裂防渗性能 

分 类 号：TU528.55[建筑科学—建筑技术科学]