长沙地区冬季地铁车站抗裂混凝土配合比优化研究

Research on Optimization of Mix Ratio of Anti-Cracking Concrete in Metro Station of Changsha Area in Winter

本文依托长沙地铁四号线汉王陵公园站,从配合比角度对混凝土抗裂性能进行了探索。通过验证,提出的混凝土配合比工作性能和力学性能均满足相关标准规范要求,同时根据相应的指标,提出有利于提高抗裂性能的施工措施,如适当增加减水剂中的缓凝组分使凝结时间略延长和跳仓法施工等。

Based on Hanwangling Park Station of Changsha Metro Line 4, this paper explores crack resistance of concrete from the perspective of mix ratio. Through verification, the performance and mechanical properties of the proposed concrete mix ratio meet the requirements of relevant standards and specifications. According to corresponding indicators, this paper puts forward the construction measures to improve the crack resistance, such as appropriately increasing the retarding components in water reducing agent to slightly extend the coagulation time, and jumping warehouse construction, and so on.