【作者】 王强； 孙威； 葛超； 夏菲； 张健； 高翔； 郝中华；

【Author】 WANG Qiang , SUN Wei, GE Chao , XIA Fei , ZHANG Jian , GAO Xiang , HAO Zhong-hua (School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China)

【机构】 沈阳建筑大学土木工程学院；

【摘要】 某工程2号塔楼筏板基础最大厚度达11m,给现场混凝土温度裂缝控制带来严峻的挑战。利用有限元软件对该筏板基础原施工方案下的混凝土水化热温度发展情况进行数值分析。结果显示,按原方案浇筑混凝土会产生过大的内表温差,不利于裂缝控制。为此,对原施工方案加以改进,提出两种有利于温度控制的技术措施,并对其效果做进一步的考察。结果表明,所提出的改进措施可有效降低混凝土的内表温差,从而使温度裂缝得到有效控制。本文的研究结论对于该筏板基础以及同类工程的混凝土浇筑施工具有一定的指导意义。更多还原

【Abstract】 An eleven meters thick raft-foundation of a high-rise building will be built,which will bring a huge challenge on temperature crack control. A numerical analysis was hold on the development of hydration heat of concrete raft foundation construction as planned. Results show that it will creat large temperature difference between interior and surface which against temperature control. Therefore, to improve original construction plan, two technical measures for temprature control were proposed, and their effectiveness were proved further. The proposed measures could decrease temperature difference between interior and surface, which make tempreature cracks were controlled well. The research results in the paper will be as the basis to conduct the raft-foundation construction on site.更多还原