海底隧道C50衬砌混凝土抗裂技术研究与应用  

Research and Application of Crack Resistance Technology of C50 Lining Concrete in Undersea Tunnel

作　　者：孟庆余 王旭 霍飞 谢彪 王育江 MENG Qingyu;WANG Xu;HUO Fei;XIE Biao;WANG Yujiang(China Railway Design Construction Group Co.,Ltd.,Tianjin 300308,China;State Key Laboratory of High Performance Civil Engineering Materials,Nanjing,Jiangsu 211103,China;School of Materials Science and Engineering,Southeast University,Nanjing,Jiangsu 211103,China)

机构地区：[1]中国铁路设计集团有限公司,天津300308 [2]高性能土工工程材料国家重点实验室,江苏南京211103 [3]东南大学材料科学与工程学院,江苏南京211103

出　　处：《施工技术（中英文）》2023年第22期92-96,110,共6页Construction Technology

基　　金：中国国家铁路集团有限公司科技研究开发计划:汕头湾高水压高侵蚀性环境及活动断层密集分布区高速铁路海底隧道关键技术研究(K2020G033)。

摘　　要：海底隧道衬砌结构混凝土强度等级要求高,通常不低于C50,施工难度大,与传统的隧道衬砌工程相比在混凝土性能方面存在较大差异。结合某海底隧道工程,为解决海底隧道高强衬砌结构混凝土开裂问题,基于开裂风险计算模型进行评估设计,以混凝土不开裂为前提,优化原材料及配合比设计,并结合一次性浇筑长度、入模温度、拆模养护等施工工艺措施,最终形成了海底隧道C50衬砌混凝土裂缝控制技术,可有效避免早期收缩开裂。The concrete strength requirement of undersea tunnel lining structure is high,usually not less than C50,and the construction is difficult.Compared with the traditional tunnel lining engineering,there are great differences in the concrete performance.Combined with an undersea tunnel project,in order to solve the problem of concrete cracking of high-strength lining structure of undersea tunnel,the evaluation design was carried out based on the cracking risk calculation model,and the design of raw materials and mix ratio was optimized on the premise of no cracking of concrete.Combined with the construction process measures such as one-time pouring length,mold entry temperature and mold removal and maintenance,the key technology scheme of concrete crack control of C50 undersea tunnel lining was finally formed,which can effectively avoid early shrinkage cracking.

关 键 词：隧道工程 高强混凝土 衬砌 裂缝 控制 施工技术 

分 类 号：U455[建筑科学—桥梁与隧道工程] TU528[交通运输工程—道路与铁道工程]