摘要
针对大跨斜拉桥主塔大体积混凝土温度裂缝控制难题,结合联石湾特大桥工程实践,从主塔结构特征与环境影响因素的系统分析入手,揭示了温度裂缝的形成机理。通过创新应用低热胶凝材料配比优化技术、智能温控监测网络布设及分区差异化养护工艺,成功将混凝土内部峰值温度控制在68.3℃以内,内外温差降至23.7℃。工程实践验证了该技术体系兼具工程可行性与经济合理性。
Aiming at the difficult problem of controlling temperature cracks in the mass concrete of the main tower of a long-span cable-stayed bridge,this study,combined with the engineering practice of the Lianshiwan Extra-Large Bridge,starts with a systematic analysis of the structural characteristics of the main tower and environmental influencing factors,and reveals the formation mechanism of temperature cracks.Through the innovative application of the optimization technology for the mixture ratio of low-heat cementitious materials,the layout of the intelligent temperature control monitoring network,and the partitioned differential curing process,the peak internal temperature of the concrete has been successfully controlled within 68.3℃,and the temperature difference between the inside and outside has been reduced to 23.7℃.The engineering practice has verified that this technical system has both engineering feasibility and economic rationality.
作者
吴楠
WU Nan(Poly Changda Engineering Co.Ltd.,Guangzhou 511431,China)
出处
《工程建设与设计》
2025年第16期177-179,共3页
Construction & Design for Engineering
关键词
大跨斜拉桥
大体积混凝土
温度控制
联石湾特大桥
long-span cable-stayed bridge
mass concrete
temperature control
Lianshiwan Extra-Large Bridge
