明挖隧道工程大体积混凝土防裂抗渗性能研究  

Research on anti-cracking and anti-seepage performance of mass concrete in open-cut tunnel engineering

作　　者：王德民 朱宇 张蔚斌 朱国军 牛瑞 舒震林 张港 WANG Demin;ZHU Yu;ZHANG Weibin;ZHU Guojun;NIU Rui;SHU Zhenlin;ZHANG Gang(Wuhan Sanyuan Special Building Materials Co.,Ltd.,Wuhan 430083,China;Suzhou Traffic Investment Construction Management Co.,Ltd.,Suzhou 215008,China;China Railway Tunnel Group Co.,Ltd.,Guangzhou 511458,China)

机构地区：[1]武汉三源特种建材有限责任公司,湖北武汉430083 [2]苏州交投建设管理有限公司,江苏苏州215008 [3]中国中铁隧道局集团有限公司,广东广州511458

出　　处：《混凝土与水泥制品》2024年第6期83-86,93,共5页China Concrete and Cement Products

摘　　要：为了研究采用SY-COM高性能纤维防裂抗渗复合材料(以下简称SY-COM复合材料)所配制的混凝土的防裂抗渗效果,对其力学、抗渗、抗裂等性能进行了测试,并依托某明挖隧道工程,监测了掺SY-COM复合材料大体积混凝土的内部温度和微应变随时间的变化规律。结果表明:与基准组相比,掺SY-COM复合材料混凝土的抗压、劈裂抗拉和抗折强度均有所提高,抗渗等级由P8提高至P12;掺SY-COM复合材料大体积混凝土的早期温降收缩量较小,早期开裂风险较低,防裂抗渗效果较好。In order to study the anti-cracking and anti-seepage effect of concrete prepared with SY-COM high-performance fiber and anti-cracking and anti-seepage composite material(SY-COM composite material),the mechanical,anti-seepage,anti-cracking and other properties were tested.Based on a certain open-cut tunnel engineering,the internal temperature and microstrain of mass concrete mixed with SY-COM composite material were monitored over time.The results show that compared with the benchmark group,the compressive,splitting tensile,and flexural strength of concrete mixed with SY-COM composite material are improved,and the impermeability level is increased from P8 to P12.The early temperature drop shrinkage of mass concrete mixed with SY-COM composite material is relatively small,the risk of early cracking is low,and the anti-cracking and anti-seepage effect is good.

关 键 词：明挖隧道工程 大体积混凝土 防裂抗渗复合材料 温度 微应变 

分 类 号：U454[建筑科学—桥梁与隧道工程]