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大模板施工是我国近几年出现的一种新工艺,它有力地促进了建筑施工工业化,特别是在高层民用建筑施工中,将成为一种重要的施工方式。所以,如何保证大模板冬季正常施工,就成为一个重要的问题。在北京市“前三门”工程冬施过程中,北京市基本建设工程指挥部组织有关单位,于76年底到77年初对大模板现浇混凝土的养护问题进行了实验研究。为了保证工程进度,采用边施工边实验及现场施工与室内实验相结合的办法,采取了蒸汽热模法、液化石油气红外线法、蓄热法及掺外加剂等养护方法,共完成了二栋十层(502及609工程)一栋十二层
Large formwork construction is a new process that has emerged in China in recent years. It has effectively promoted the industrialization of building construction, especially in the construction of high-rise civil buildings, and will become an important construction method. Therefore, how to ensure the normal construction of the large formwork in winter has become an important issue. During the winter construction process of the “first three projects” in Beijing, the Beijing Capital Construction Project Headquarters organized relevant units to conduct experimental research on the maintenance of large formwork cast-in-place concrete from the end of 76 to the beginning of the year. In order to guarantee the progress of the project, the method of combining the side-by-side construction experiment with the on-site construction and the indoor experiment was adopted, and the steam heating method, the LPG infrared method, the thermal storage method and the admixture of admixtures and other conservation methods were adopted, and a total of two buildings were completed. Ten floors (502 and 609 works) One twelve floors