不同注浆材料对同步注浆惰性浆液耐久性的影响研究  

Research on the Influence of Different Grouting Materials on theDurability of Inert Grout in Simultaneous Grouting

作　　者：郝道明 HAO Daoming(Sichuan Xingshu Highway Construction Development Co.,Ltd.,Chengdu 610041,China)

机构地区：[1]四川兴蜀公路建设发展有限责任公司,成都610041

出　　处：《交通科技》2024年第4期98-102,共5页Transportation Science & Technology

摘　　要：为有效提升盾构隧道同步注浆惰性浆液的耐久性,文中采用室内试验的方法,分析不同水胶比、粉灰比、胶砂比,以及膨水比对惰性浆液体积收缩率和强度衰减率的影响规律,确定浆液耐久性的控制性影响因素。结果表明,①惰性浆液结石体耐久性随浆液结石体龄期的增长而逐渐变差,28 d浆液结石体体积收缩率和强度衰减率最大分别为22%和20.9%。②水胶比、粉灰比、膨水比对惰性浆液的耐久性影响较大,因此,考虑到惰性浆液耐久性对盾构隧道后期运维的影响,应适时调整浆液配合比。To effectively enhance the durability of synchronous grouting slurry,indoor testing methods were adopted to analyze the influence of different water-cement ratios,powder-ash ratios,cement-sand ratios,and expansive agent ratios on the volume shrinkage and strength attenuation rates of inert slurry,and to determine the controlling factors affecting slurry durability.The research findings indicate that:①The durability of inert slurry stone bodies gradually deteriorates with the increase of slurry stone age,with maximum volume shrinkage and strength attenuation rates of 22%and 20.9%,respectively,at 28 days.②Water-cement ratio,powder-ash ratio,and expansive agent ratio have significant impacts on the durability of inert slurry,therefore,considering the effect of inert slurry durability on the later operation of shield tunnels,it is necessary to adjust the slurry mix proportion in a timely manner.

关 键 词：同步注浆 室内试验 耐久性 体积收缩率 强度衰减率 

分 类 号：U455[建筑科学—桥梁与隧道工程]