摘要
为研制一种防膨胀软岩注浆材料以满足膨胀性软岩巷道注浆加固的需求。通过室内试验,研究注浆材料的密度、析水率、凝结时间、流动度、结石体强度等主要性能参数。通过现场试验,研究注浆材料对膨胀性软岩巷道围岩的注浆加固性能。研究结果表明:当注浆材料的水灰比为0.5∶1,添加剂比率为5‰时,注浆材料的主要性能参数最优;该注浆材料能有效提高破碎膨胀性软岩的强度,改善膨胀性软岩巷道围岩的特性,防止软岩巷道围岩在注浆时发生吸水膨胀变形,是一种较好的防软岩膨胀注浆材料。
A type of anti-swelling grouting material has been manufactured in order to meet the demand for the grouting reinforcement of the underground roadway in swelling soft rock. The main parameters of performance of the grouting material,such as the density,the bleeding ration,the setting time,the fluidity and the consolidating strength were studied in the laboratory tests. Meanwhile the reinforcement performance of the grouting material was researched in an in-suit experiment. The results show that the main parameters of performance of the grouting material are optimal when the water-cement ratio is 0.5：1 and the ratio of the additive is 5‰. The grouting material is confirmed to improve effectively the property of the surrounding rock and enhance the strength of the broken and swelling soft rock. Meanwhile the grouting material also prevents the swelling deformations of the soft surrounding rock during the grouting process.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2017年第2期457-465,共9页
Chinese Journal of Rock Mechanics and Engineering
基金
国家重点研发计划专项资助项目(2016YFC0600901)
国家自然科学基金面上项目(51374214)
国家自然科学基金重点项目(51134005)~~
关键词
岩石力学
软岩
防膨胀
注浆材料
加固性能
rock mechanics
soft rock
anti-swelling
grouting material
reinforcement performance
