摘要
由于大体积混凝土结构复杂,容易产生裂缝,不仅会影响结构的外观质量,还会降低结构的承载力、耐久性和抗渗性等,对地铁车站的安全运营造成负面影响。本文对地铁车站大体积混凝土结构裂缝控制进行研究,通过优化混凝土配合比,提升混凝土性能,严格选择模板,控制混凝土浇筑厚度和温度,改进混凝土浇筑策略,规范振捣与压面操作,提高施工质量,采取科学的保湿与保温养护措施,防止地铁车站大体积混凝土结构产生裂缝。工程实践结果表明:使用上述控制方法,地铁车站大体积混凝土结构产生的裂缝宽度均控制在0.2 mm以下,符合施工要求。
Due to the complex structure of mass concrete,cracks are prone to occur,which not only affects the visual quality of the structure but also reduces its load-bearing capacity,durability,and impermeability,thereby adversely impacting the safe operation of subway stations.Therefore,this paper conducts research on crack control in mass concrete structures of subway stations.By optimizing the concrete mix proportion to enhance concrete performance,strictly selecting formwork,controlling the pouring thickness and temperature of concrete,improving concrete pouring strategies,standardizing vibration and surface leveling operations to enhance construction quality,and adopting scientific moisture retention and thermal insulation measures,the occurrence of cracks in mass concrete structures of subway stations is prevented.Engineering application results indicate that with the application of the aforementioned control methods,the crack widths in the mass concrete structures of subway stations are all controlled below 0.2 mm,meeting the construction requirements.
出处
《混凝土世界》
2025年第2期67-70,共4页
China Concrete
