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 the Durability of Inert Grout in Simultaneous Grouting
郝道明1
作者信息
- 1. 四川兴蜀公路建设发展有限责任公司 成都 610041
- 折叠
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.
Abstract
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 indi-cate that:①The durability of inert slurry stone bodies gradually deteriorates with the increase of slur-ry stone age,with maximum volume shrinkage and strength attenuation rates of 22%and 20.9%,re-spectively,at 28 days.②Water-cement ratio,powder-ash ratio,and expansive agent ratio have signifi-cant 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Key words
synchronous grouting/indoor experiments/durability/volume shrinkage rate/strength attenuation rate引用本文复制引用
出版年
2024
NETL
NSTL
万方数据